CN120136039A - A continuous purification method of hydrogen peroxide and hydrogen peroxide produced therefrom - Google Patents
A continuous purification method of hydrogen peroxide and hydrogen peroxide produced therefrom Download PDFInfo
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
- C01B15/01—Hydrogen peroxide
- C01B15/013—Separation; Purification; Concentration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D61/58—Multistep processes
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Abstract
The invention discloses a continuous purification method of hydrogen peroxide and hydrogen peroxide prepared by the method, which are characterized in that the concentration of industrial-grade hydrogen peroxide is regulated, the feeding temperature of a system is controlled, the treated hydrogen peroxide sequentially flows through a plurality of organic matter treatment units which are arranged in series, each treatment unit comprises an ultrasonic treatment device and a membrane filtration device which are sequentially communicated, in each treatment unit, the hydrogen peroxide sequentially undergoes ultrasonic oscillation treatment and membrane filtration treatment, the residence time of the hydrogen peroxide in a rear-stage ultrasonic treatment device is controlled to be longer than that in a front-stage ultrasonic treatment device, the pore diameter of a filter core of the rear-stage membrane filtration device is controlled to be smaller than that of the filter core of the front-stage membrane filtration device, and the method does not need to additionally pass through a resin tower in the organic matter removal stage, so that the hydrogen peroxide entering the rear-stage anion-cation resin tower has higher purity, the service life of the rear-stage resin tower is prolonged, and the organic matter content in the prepared hydrogen peroxide can be reduced to below 10 ppb.
Description
The invention is a divisional application of Chinese invention patent application with application date 2023, 2-month and 23, application number 2023101612502 and name of "a purification method of hydrogen peroxide".
Technical Field
The invention relates to the technical field of hydrogen peroxide purification, in particular to a continuous purification method of hydrogen peroxide and hydrogen peroxide prepared by the method.
Background
Hydrogen peroxide is also called hydrogen peroxide, is blue viscous liquid, is dissolved in water, alcohol and diethyl ether, is insoluble in benzene and petroleum ether, and is colorless transparent liquid, and is an important inorganic chemical product, and widely applied to the fields of chemical industry, medicine, electronics, food, textile, papermaking, light industry, military industry, environmental protection and the like. The hydrogen peroxide of industrial products contains more organic impurities, so that the requirements of the electronic industry or the food industry cannot be met, and the organic impurities in the hydrogen peroxide need to be removed.
At present, a plurality of resin towers are connected in series to purify industrial hydrogen peroxide by using a resin adsorption method and resin ion exchange, and specifically, an organic (TOC) resin adsorption tower, a cation exchange resin tower and an anion exchange resin tower which are connected in series in sequence are arranged. However, since the organic substances (TOC) content in industrial-grade hydrogen peroxide is generally high, and the ion impurities are also high, when the above-mentioned resin adsorption and anion-cation exchange methods are adopted, the load is high, the energy consumption is high, the resin filler in the resin tower needs to be frequently replaced or regenerated, the cost is too high, and the strong oxidizing property, heat sensitivity and instability of hydrogen peroxide limit the application of various conventional purification means.
Aiming at the problems, a purification method for removing organic matters in hydrogen peroxide at low temperature is disclosed in Chinese patent CN112723316A, and mainly comprises a cooling stage and a filtering stage which are sequentially carried out, wherein the cooling stage is used for cooling industrial grade hydrogen peroxide to 0-8 ℃ and preferably 4-8 ℃, and the filtering stage is used for filtering the cooled hydrogen peroxide by adopting a membrane filter to remove TOC. However, in the patent document, the organic matter (TOC) content in the hydrogen peroxide treated by the purification method is still as high as tens of ppm, and the high standard requirement of the semiconductor grade ultra-high purity hydrogen peroxide is difficult to meet.
Disclosure of Invention
The invention aims to overcome one or more defects of the prior art and provide an improved continuous purification method of hydrogen peroxide, which can ensure that the hydrogen peroxide entering a subsequent anion and cation resin removal tower has higher purity without additionally passing through a resin tower in the stage of removing organic matters (TOC), thereby prolonging the service life of the subsequent resin tower, and the content of the organic matters (TOC) in the hydrogen peroxide after treatment is lower than 10ppb.
In order to achieve the aim, the technical scheme adopted by the invention is that the purification method of hydrogen peroxide takes industrial grade hydrogen peroxide as a raw material, and the purification method comprises the following steps:
The mass percentage concentration of the industrial grade hydrogen peroxide is regulated to 30-40%, the feeding temperature of the system is controlled to be 0-5 ℃, and then the treated hydrogen peroxide sequentially flows through n organic matter treatment units which are arranged in series, wherein n is more than or equal to 2;
Each organic matter treatment unit independently comprises an ultrasonic treatment device and a membrane filtration device which are communicated in sequence, wherein in each organic matter treatment unit, hydrogen peroxide is subjected to oscillation treatment by the ultrasonic treatment device and filtration treatment by the membrane filtration device in sequence;
Controlling the residence time of hydrogen peroxide in the ultrasonic treatment device contained in the organic matter treatment unit at the subsequent stage to be longer than the residence time of hydrogen peroxide in the ultrasonic treatment device contained in the organic matter treatment unit at the previous stage;
and controlling the aperture of the filter element of the membrane filter device contained in the organic matter treatment unit at the later stage to be smaller than that of the filter element of the membrane filter device contained in the organic matter treatment unit at the previous stage.
According to some preferred aspects of the invention, n is 3, 4 or 5.
According to some preferred aspects of the invention, the operating frequency of the ultrasonic treatment device is 25-40kHz.
According to some preferred aspects of the present invention, the residence time of hydrogen peroxide in the ultrasonic treatment apparatus included in the organic matter treatment unit of the subsequent stage is controlled to be 1.2 to 3 times the residence time in the ultrasonic treatment apparatus included in the organic matter treatment unit of the previous stage.
In some embodiments of the present invention, the residence time of hydrogen peroxide in the ultrasonic treatment apparatus included in the organic matter treatment unit of the subsequent stage is controlled to be 1.2 to 1.5 times the residence time in the ultrasonic treatment apparatus included in the organic matter treatment unit of the previous stage.
In some embodiments of the present invention, the residence time of hydrogen peroxide in the ultrasonic treatment apparatus included in the organic matter treatment unit of the subsequent stage is controlled to be 1.5 to 2.0 times the residence time in the ultrasonic treatment apparatus included in the organic matter treatment unit of the previous stage.
In some embodiments of the present invention, the residence time of hydrogen peroxide in the ultrasonic treatment apparatus included in the organic matter treatment unit of the subsequent stage is controlled to be 2.0 to 3.0 times the residence time in the ultrasonic treatment apparatus included in the organic matter treatment unit of the previous stage.
According to some preferred aspects of the present invention, the pore diameter of the filter element of the membrane filtration device included in the organic matter treatment unit of the subsequent stage is controlled to be 0.05 to 0.8 times the pore diameter of the filter element of the membrane filtration device included in the organic matter treatment unit of the previous stage.
In some embodiments of the present invention, the pore size of the filter element of the membrane filtration device included in the organic matter treatment unit of the subsequent stage is controlled to be 0.05 to 0.15 times the pore size of the filter element of the membrane filtration device included in the organic matter treatment unit of the previous stage.
In some embodiments of the present invention, the pore size of the filter element of the membrane filtration device included in the organic matter treatment unit of the subsequent stage is controlled to be 0.2 to 0.35 times the pore size of the filter element of the membrane filtration device included in the organic matter treatment unit of the previous stage.
In some embodiments of the present invention, the pore size of the filter element of the membrane filtration device included in the organic matter treatment unit of the subsequent stage is controlled to be 0.35 to 0.55 times the pore size of the filter element of the membrane filtration device included in the organic matter treatment unit of the previous stage.
In some embodiments of the present invention, the pore size of the filter element of the membrane filtration device included in the organic matter treatment unit of the subsequent stage is controlled to be 0.55 to 0.8 times the pore size of the filter element of the membrane filtration device included in the organic matter treatment unit of the previous stage.
According to some preferred and specific aspects of the present invention, when n is 3, the treated hydrogen peroxide is sequentially passed through a primary ultrasonic treatment device, a primary membrane filtration device, a secondary ultrasonic treatment device, a secondary membrane filtration device, a tertiary ultrasonic treatment device, and a tertiary membrane filtration device, which are arranged in series.
According to some preferred and specific aspects of the present invention, the residence time of the primary ultrasonic treatment device, the residence time of the secondary ultrasonic treatment device, and the residence time of the tertiary ultrasonic treatment device are controlled to be 5-15min, 15-25min, and 25-35min, respectively.
Further, the residence time of the primary ultrasonic treatment device, the residence time of the secondary ultrasonic treatment device and the residence time of the tertiary ultrasonic treatment device are controlled to be 8-12min, 18-22min and 28-32min respectively.
According to a specific aspect of the invention, the residence time of the primary ultrasonic treatment device, the residence time of the secondary ultrasonic treatment device and the residence time of the tertiary ultrasonic treatment device are controlled to be 10min, 20min and 30min respectively.
According to some preferred and specific aspects of the present invention, the pore size of the filter element of the primary membrane filtration device, the pore size of the filter element of the secondary membrane filtration device, and the pore size of the filter element of the tertiary membrane filtration device are controlled to be 0.04-0.06 μm, 0.005-0.015 μm, and 0.5-10nm, respectively.
According to some specific aspects of the invention, the micro-filtration membrane filter device can be used for short when the aperture of the filter element of the primary membrane filter device is 0.04-0.06 mu m, the ultra-filtration membrane filter device can be used for short when the aperture of the filter element of the secondary membrane filter device is 0.005-0.015 mu m, and the RO reverse osmosis membrane filter device can be used for short when the aperture of the filter element of the tertiary membrane filter device is 0.5-10 nm.
According to some preferred aspects of the invention, the filter element of the membrane filtration device is made of polytetrafluoroethylene.
According to some preferred and specific aspects of the invention, the filtration pressure of the membrane filtration device is 0.5-0.8MPa.
According to some preferred aspects of the invention, the ultrasonic treatment device comprises an ultrasonic generator and a pipe arranged in the ultrasonic generator, the length of the pipe being controlled to control the residence time of hydrogen peroxide in the ultrasonic treatment device.
According to some preferred and specific aspects of the invention, the flow rate of the treated hydrogen peroxide in the organic matter treatment unit is 100-200L/h.
In some embodiments of the invention, the specific process controlling the purification process is performed at an ambient temperature of 25 ℃ or less.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
The method is based on the problems of high energy consumption, complex operation, non-ideal purification effect and the like in the prior art when the organic matters in the hydrogen peroxide are removed, innovatively adopts a method of ultra-low temperature and ultrasonic oscillation and further assisting in membrane filtration to separate the organic matters in the hydrogen peroxide, further combines multistage sequential treatment, controls the stay time of ultrasonic oscillation in each stage and adopts a mode of matching the membrane filtration multistage pore diameters, not only can greatly effectively reduce the content of organic matters impurities in the hydrogen peroxide, can reach ppb level, even lower than 10ppb, so that high-purity hydrogen peroxide with standard quality can be produced on the premise of ensuring continuous and stable production, but also the method does not need to additionally pass through a resin tower, ensures that the hydrogen peroxide entering a subsequent anion-cation removing resin tower has higher purity, and can further improve the service life of a subsequent resin tower.
Drawings
FIG. 1 is a process flow diagram of a method for purifying hydrogen peroxide according to an embodiment of the present invention;
In the reference numerals, 1, a pretreatment device, 2, a first-stage ultrasonic treatment device, 3, a first-stage membrane filtration device, 4, a second-stage ultrasonic treatment device, 5, a second-stage membrane filtration device, 6, a third-stage ultrasonic treatment device, 7, a third-stage membrane filtration device, 8, an ultrasonic generator, 9 and a pipeline.
Detailed Description
As shown in a process flow chart adopted by the hydrogen peroxide purification method in the embodiment of the invention as shown in figure 1, the mass percentage concentration of industrial grade hydrogen peroxide is regulated to 30-40% by a pretreatment device 1, and the feeding temperature of the system is controlled to be 0-5 ℃, and the temperature is lower than the cooling temperature in the conventional operation, in the system of the invention, practice shows that the method can better separate out organic impurities in the hydrogen peroxide, can be more beneficial to the combination of ultrasonic vibration and membrane filtration for removing the organic impurities, then the treated hydrogen peroxide sequentially flows through 3 organic matter treatment units arranged in series, specifically, the treated hydrogen peroxide sequentially flows through a first-stage ultrasonic treatment device 2, a first-stage membrane filtration device 3, a second-stage ultrasonic treatment device 4, a second-stage membrane filtration device 5 and a third-stage ultrasonic treatment device 7 arranged in series at a certain flow rate (preferably 100L/h-200L/h), wherein the residence time of the first-stage ultrasonic treatment device, the residence time of the second-stage ultrasonic treatment device and the third-stage ultrasonic treatment device are controlled to be 5-15min, 15-25min, 25-35min, the residence time of the third-stage ultrasonic treatment device is controlled to be respectively 5.015-0.0.05 mu m of the filter element, the filter element is controlled to be in front of the filter element, the filter element is controlled to be 0.0.0-0.05 mu m of the filter element, the filter element is respectively, and the filter element is arranged in front of the first-stage filtration device is controlled to be 0.0.0.05 m of the filter element, by controlling the difference between the residence time and the pore diameter of the filter element, the organic matter is removed more comprehensively and thoroughly, the purity is greatly improved, and the organic matter content is basically below 10ppb, even below 5 ppb.
Further, the ultrasonic treatment device comprises an ultrasonic generator 8 and a pipeline 9 arranged in the ultrasonic generator 8, the length of the pipeline 9 is controlled to control the residence time of hydrogen peroxide in the ultrasonic treatment device, preferably, the pipeline can be distributed in a serpentine shape, and further, the length change of the pipeline can be controlled in a limited space without additionally expanding the space occupation ratio of the ultrasonic generator.
Furthermore, the membrane filter selected in the filtering stage is a filter membrane of polyvinylidene fluoride (PVDF) with a special membrane material, insoluble matters separated out by cooling in the previous stage can be completely filtered by utilizing the polarity and surface tension of the filter membrane of the material and selecting the filtering precision of the filter membrane, and the ultrasonic auxiliary filtering of the three-stage filter element can effectively reduce the transmittance of organic matters and achieve the aim of nano-scale purification, so that the organic matter content in the treated hydrogen peroxide is greatly reduced. In addition, in some alternative embodiments, the selected filtering membrane can be washed by ultrapure water before use, so that the dissolution of the filtering core can be reduced to the maximum extent, and the filtering is more effective.
The method can meet the strict quality requirement of the ultra-high-purity hydrogen peroxide product, can adapt to the characteristics of hydrogen peroxide, does not cause production potential safety hazards, and has the advantages of short separation time, high efficiency, convenience in operation and the like.
The foregoing will be further described in conjunction with the following specific embodiments, it being understood that these embodiments are provided to illustrate the basic principles, main features and advantages of the present invention, and that the invention is not limited in scope by the following embodiments, which may be further modified according to specific requirements, but in general under the conditions of routine experimentation.
All starting materials, not specifically illustrated in the examples below, may be obtained from commercial sources or prepared by methods conventional in the art.
In the following, unless otherwise specified, "wt%" is stated as a weight percentage concentration.
Example 1
This example provides a method for purifying hydrogen peroxide using the process flow shown in fig. 1, comprising the following steps, performed sequentially and continuously:
(1) Adjusting the concentration of industrial hydrogen peroxide (50 wt% of Amara chemical Co., ltd.) to about 30wt%, and controlling the feeding temperature of hydrogen peroxide to 2.5+ -1deg.C;
(2) Enabling the hydrogen peroxide treated in the step (1) to sequentially enter a primary ultrasonic treatment device at a flow rate of 100L/h, enabling the hydrogen peroxide flowing out of a pipeline to enter a primary membrane filtration device (a filter element is a MILLI microporous filter membrane with a pore diameter of 0.05 mu m and a filter element material of polyvinylidene fluoride (PVDF)), then enabling the hydrogen peroxide flowing out of the pipeline to enter a secondary ultrasonic treatment device (the filter element is a column type ultrafiltration membrane (with a molecular weight cutoff of 1000D) with a pore diameter of 0.01 mu m and a filter element material of polyvinylidene fluoride (PVDF)) and finally enabling the hydrogen peroxide flowing out of the pipeline to enter a tertiary membrane filtration device (the filter element is a American sea-de Reverse Osmosis (RO) membrane with a pore diameter of 1nm and the filter element material of polyvinylidene fluoride (PVDF)) to obtain hydrogen peroxide with organic matters removed;
The filter pressure is 0.5MPa of the primary membrane filter device, 0.5MPa of the primary membrane filter device and 0.5MPa of the primary membrane filter device, and the residence time of the primary ultrasonic treatment device, the residence time of the secondary ultrasonic treatment device and the residence time of the tertiary ultrasonic treatment device are controlled to be 10min, 20min and 30min respectively;
The working frequency of an ultrasonic generator of the ultrasonic processing device is 25kHz;
controlling the specific process of the purification method to be carried out at the ambient temperature of 20+/-5 ℃;
the content detection results of the purified hydrogen peroxide and organic impurities are shown in table 1.
Example 2
This example provides a method for purifying hydrogen peroxide, which differs substantially from example 1 only in that:
in the step (1), the concentration of industrial hydrogen peroxide (50 wt% of Amersham chemical Co., ltd.) was adjusted to 35wt%;
in the step (2), the hydrogen peroxide treated in the step (1) is sequentially fed into a primary ultrasonic treatment device at a flow rate of 150L/h.
The content detection results of the purified hydrogen peroxide and organic impurities are shown in table 1.
Example 3
This example provides a method for purifying hydrogen peroxide, which differs substantially from example 1 only in that:
in the step (1), the concentration of industrial hydrogen peroxide (50 wt% of Amersham chemical Co., ltd.) was adjusted to 40wt%;
In the step (2), the hydrogen peroxide treated in the step (1) is sequentially fed into a primary ultrasonic treatment device at a flow rate of 200L/h.
The content detection results of the purified hydrogen peroxide and organic impurities are shown in table 1.
Example 4
The present example provides a method for purifying hydrogen peroxide, which is basically the same as that of example 1, except that the residence time of the primary ultrasonic treatment apparatus, the residence time of the secondary ultrasonic treatment apparatus, and the residence time of the tertiary ultrasonic treatment apparatus are controlled to be 10min, 25min, and 35min, respectively.
Comparative example 1
The example provides a method for purifying hydrogen peroxide, which comprises the following steps sequentially and continuously:
(1) Adjusting the concentration of industrial hydrogen peroxide (50 wt% of Amara chemical Co., ltd.) to about 30wt%, and controlling the feeding temperature of hydrogen peroxide to 2.5+ -1deg.C;
(2) The treated hydrogen peroxide sequentially passes through macroporous adsorption resins (A and B series macroporous adsorption resins of Anhui-port Tianxing resin company) at a flow rate of 200L/h to obtain the hydrogen peroxide with the organic matters removed. The detection results of the impurity content of the purified hydrogen peroxide organic matter are shown in table 1.
Comparative example 2
This example provides a method for purifying hydrogen peroxide, which is basically the same as example 1, except that the 3-stage ultrasonic treatment apparatus is omitted and the treated hydrogen peroxide is sequentially passed through the 3-stage membrane filtration apparatus. The detection results of the impurity content of the purified hydrogen peroxide organic matter are shown in table 1.
Comparative example 3
This example provides a method for purifying hydrogen peroxide, which is basically the same as example 1, except that the residence time in the three-stage ultrasonic treatment apparatus is controlled to be the same. The detection results of the impurity content of the purified hydrogen peroxide organic matter are shown in table 1.
TABLE 1 impurity levels of organic matter in Hydrogen peroxide after removal of organic matter of examples 1-4 and comparative examples 1-3
From the above, it is clear that, compared with example 1, comparative examples 1 to 3 have significantly reduced organic matter removal, and although comparative example 1 has relatively good organic matter removal effect, it uses conventional macroporous adsorption resin, which determines that the frequency of resin desorption regeneration is high, so that the cost is high, and comparative example 2 has the worst organic matter removal effect, which shows that the ultrasonic treatment plays an important role in the method of the present invention, and comparative example 3 has the same residence time in different ultrasonic treatment devices, which changes with the cooperation of different membrane filtration devices, so that the organic matter removal is difficult to maximize, and the content of organic matters in the final hydrogen peroxide is still high. The method adopts ultralow temperature and ultrasonic oscillation and further assists membrane filtration to separate organic matters in the hydrogen peroxide, further combines multistage sequential treatment, controls the stay time of ultrasonic oscillation in each stage and adopts a mode of matching the pore diameters of the membrane filtration stages, thereby realizing high-efficiency removal of the organic matters in the hydrogen peroxide, and enabling the content of the organic matters to be basically below 10ppb, even below 5 ppb.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
Claims (10)
1. A continuous purification method of hydrogen peroxide, characterized in that the purification method comprises:
The mass percentage concentration of the industrial grade hydrogen peroxide is regulated to 30-40% by a pretreatment device, the feeding temperature of the system is controlled to be 0-5 ℃, and then the treated hydrogen peroxide sequentially flows through n organic matter treatment units which are arranged in series, wherein n is more than or equal to 3;
Each organic matter treatment unit independently comprises an ultrasonic treatment device and a membrane filtration device which are communicated in sequence, wherein in each organic matter treatment unit, hydrogen peroxide sequentially undergoes oscillation treatment by the ultrasonic treatment device and filtration treatment by the membrane filtration device, and the content of organic matters in the purified hydrogen peroxide is below 10 ppb;
The method comprises the steps of controlling the residence time of hydrogen peroxide in an ultrasonic treatment device contained in an organic matter treatment unit at the later stage to be longer than the residence time of hydrogen peroxide in the ultrasonic treatment device contained in the organic matter treatment unit at the previous stage, and controlling the aperture of a filter element of a membrane filtration device contained in the organic matter treatment unit at the later stage to be smaller than the aperture of a filter element of the membrane filtration device contained in the organic matter treatment unit at the previous stage.
2. The continuous purification method of hydrogen peroxide according to claim 1, wherein the residence time of hydrogen peroxide in the ultrasonic treatment apparatus comprised in the organic matter treatment unit of the subsequent stage is controlled to be 1.2 to 3 times, further 1.2 to 1.5 times, the residence time in the ultrasonic treatment apparatus comprised in the organic matter treatment unit of the previous stage;
the aperture of the filter element of the membrane filtration device contained in the organic matter treatment unit at the subsequent stage is controlled to be 0.05-0.8 times, and further 0.05-0.15 times of the aperture of the filter element of the membrane filtration device contained in the organic matter treatment unit at the previous stage.
3. The continuous purification method of hydrogen peroxide according to claim 1, wherein the residence time of hydrogen peroxide in the ultrasonic treatment apparatus comprised in the organic matter treatment unit of the subsequent stage is controlled to be 1.5 to 2.0 times, or 2.0 to 3.0 times, the residence time in the ultrasonic treatment apparatus comprised in the organic matter treatment unit of the previous stage, and/or,
The aperture of the filter element of the membrane filtration device contained in the organic matter treatment unit at the subsequent stage is controlled to be 0.2-0.35 times, or 0.35-0.55 times, or 0.55-0.8 times of that of the filter element of the membrane filtration device contained in the organic matter treatment unit at the previous stage.
4. A continuous purification method of hydrogen peroxide according to any one of claims 1-3, wherein the ultrasonic treatment device comprises an ultrasonic generator and a pipe provided in the ultrasonic generator, the length of the pipe being controlled to control the residence time of hydrogen peroxide in the ultrasonic treatment device.
5. The method for continuous purification of hydrogen peroxide according to claim 4, wherein the pipes are distributed in a serpentine shape and/or the ultrasonic treatment device has an operating frequency of 25-40kHz.
6. The method for continuously purifying hydrogen peroxide according to claim 1, wherein n is 3,4 or 5, and/or the flow rate of the treated hydrogen peroxide in the organic matter treatment unit is 100 to 200L/h.
7. The continuous purification method of hydrogen peroxide according to claim 1, wherein when n is 3, the treated hydrogen peroxide is sequentially passed through a primary ultrasonic treatment device, a primary membrane filtration device, a secondary ultrasonic treatment device, a secondary membrane filtration device, a tertiary ultrasonic treatment device, and a tertiary membrane filtration device, which are arranged in series.
8. The continuous purification method of hydrogen peroxide according to claim 7, wherein the residence time of the primary ultrasonic treatment device, the residence time of the secondary ultrasonic treatment device, and the residence time of the tertiary ultrasonic treatment device are controlled to be 5 to 15min, 15 to 25min, and 25 to 35min, respectively, and further wherein the residence time of the primary ultrasonic treatment device, the residence time of the secondary ultrasonic treatment device, and the residence time of the tertiary ultrasonic treatment device are controlled to be 8 to 12min, 18 to 22min, and 28 to 32min, respectively;
The primary membrane filter device is a microfiltration membrane filter device with the filter element aperture of 0.04-0.06 mu m, the secondary membrane filter device is an ultrafiltration membrane filter device with the filter element aperture of 0.005-0.015 mu m, and the tertiary membrane filter device is an RO reverse osmosis membrane filter device with the filter element aperture of 0.5-10 nm.
9. The method for continuously purifying hydrogen peroxide according to claim 1, wherein the content of organic matters in the purified hydrogen peroxide is less than 5ppb, and/or the specific process of the continuous purifying method is controlled to be carried out at an ambient temperature of 25 ℃ or less, and/or the filtration pressure of the membrane filtration device is 0.5-0.8MPa, and/or the material of the filter element of the membrane filtration device is polyvinylidene fluoride.
10. Hydrogen peroxide produced by a continuous purification process of hydrogen peroxide according to any one of claims 1-9, which hydrogen peroxide can be used in the pharmaceutical, electronic, food, textile or paper industry.
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| JP2004067402A (en) * | 2002-08-01 | 2004-03-04 | Asahi Denka Kogyo Kk | Hydrogen peroxide water purification method |
| CN102556976A (en) * | 2010-12-08 | 2012-07-11 | 上海华谊微电子材料有限公司 | Method for continuous production of ultrapure hydrogen peroxide |
| CN106673383A (en) * | 2016-12-30 | 2017-05-17 | 北京普利科林环境科技有限公司 | Method for strengthening dehydration of petrochemical residual sludge based on physical and chemical combined pretreatment |
| CN112723316A (en) * | 2021-01-04 | 2021-04-30 | 联仕(昆山)化学材料有限公司 | Purification method for removing TOC in hydrogen peroxide at low temperature |
| CN114590781A (en) * | 2022-02-25 | 2022-06-07 | 江苏捷创新材料有限责任公司 | Preparation method of electronic grade hydrogen peroxide |
| CN114956406A (en) * | 2022-05-24 | 2022-08-30 | 山西晋川合成材料股份有限公司 | High-salt high-concentration wastewater treatment method based on ultrasonic advanced oxidation |
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