CN116410819A - Residual oil refining method for refined clay - Google Patents
Residual oil refining method for refined clay Download PDFInfo
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- CN116410819A CN116410819A CN202111648233.9A CN202111648233A CN116410819A CN 116410819 A CN116410819 A CN 116410819A CN 202111648233 A CN202111648233 A CN 202111648233A CN 116410819 A CN116410819 A CN 116410819A
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- Prior art keywords
- clay
- washing
- refining
- refined
- petroleum ether
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- 239000004927 clay Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000007670 refining Methods 0.000 title claims abstract description 40
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 87
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000005406 washing Methods 0.000 claims abstract description 70
- 239000007788 liquid Substances 0.000 claims abstract description 50
- 239000003208 petroleum Substances 0.000 claims abstract description 43
- 239000008157 edible vegetable oil Substances 0.000 claims abstract description 29
- 238000000926 separation method Methods 0.000 claims abstract description 28
- 239000003921 oil Substances 0.000 claims abstract description 20
- 239000010779 crude oil Substances 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims description 17
- 238000003860 storage Methods 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 238000004061 bleaching Methods 0.000 claims description 6
- 238000002386 leaching Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 235000021588 free fatty acids Nutrition 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 230000004584 weight gain Effects 0.000 description 2
- 235000019786 weight gain Nutrition 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000007630 basic procedure Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000011369 optimal treatment Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B3/00—Refining fats or fatty oils
- C11B3/10—Refining fats or fatty oils by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Microbiology (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Fats And Perfumes (AREA)
Abstract
A method for refining residual oil of refined clay belongs to the technical field of edible oil extraction. The method is characterized by comprising the following steps of: adding food-grade sodium hydroxide into refined clay generated in the decoloring process of edible oil refining; washing refined clay mixed with sodium hydroxide by using petroleum ether, and then carrying out solid-liquid separation; concentrating the liquid subjected to solid-liquid separation at the temperature of 75-85 ℃ under normal pressure to recover petroleum ether, and obtaining concentrated solution after concentration to obtain crude oil. The sodium hydroxide is added in the washing process of the refined clay, so that not only can the washing rate of residual oil in the refined clay be improved, but also part of clay activity can be recovered by the clay.
Description
Technical Field
A method for refining residual oil of refined clay belongs to the technical field of edible oil extraction.
Background
Refining refers to a series of processes for treating raw edible oil during the production of edible oil. Crude edible oil is extracted from oil by pressing or leaching. The crude edible oil contains some impurities such as peptized impurities, free fatty acids, pigments, malodorous substances, etc. These impurities affect the edibility and stability of the edible oil, such as free fatty acids can make the edible oil more prone to rancidity, while malodorous substances can affect the flavor and smoke point of the edible oil, which is detrimental to use. Therefore, impurities in the crude edible oil are required to be removed cleanly by refining, so that the quality and the value of the edible oil are improved, the edible oil meets the national standard, and the edible oil can be sold on the market. This is the main role of edible oil refining in the production process of edible oil. The refining process of the edible oil mainly comprises four operation working sections of degumming, deacidification, decolorization and deodorization, and each working section removes corresponding impurities. After deodorization is completed, impurities of the edible oil are removed completely, and the refining process of the edible oil is finished.
The decoloring is to remove pigment and partial particulate impurities in the oil by utilizing the adsorptivity of the clay, but the clay also adsorbs and takes away partial edible oil, and the oil content of the refined clay can reach 20% -30%. There is currently a lack of a specific method for recovering this portion of the edible oil while recovering the clay portion of activity.
Disclosure of Invention
The invention aims to solve the technical problems that: overcomes the defects of the prior art and provides a residual oil refining method of refined clay which can recover edible oil and recover the activity of clay part.
The technical scheme adopted for solving the technical problems is as follows: the residual oil refining method of the refined clay is characterized by comprising the following steps of:
1) Adding food-grade sodium hydroxide into refined clay generated in the decoloring process of edible oil refining, and uniformly mixing, wherein the adding amount of the sodium hydroxide is 0.03% -1% of the mass of the refined clay;
2) Washing the refined clay mixed with sodium hydroxide in the step 1) by using petroleum ether; washing, then carrying out solid-liquid separation, and drying the solid separated from the solid to recover petroleum ether to obtain the revived clay; the specific process for washing and refining the clay by using the petroleum ether in the step 2) comprises the following steps: washing the refined clay for 2-20 times by adopting a countercurrent washing mode, namely: washing the refining clay washed for the nth time of the next batch by using part or all of the petroleum ether washed for the (n+1) th time except the fresh petroleum ether used for the last time;
3) And (3) concentrating the liquid subjected to solid-liquid separation in the step (2) at the normal pressure of 75-85 ℃ to recover petroleum ether, and obtaining concentrated solution after concentration to obtain crude oil.
The sodium hydroxide is added in the washing process of the refined clay, so that not only can the washing rate of residual oil in the refined clay be improved, but also part of clay activity can be recovered by the clay. The clay can be used for impurity adsorption treatment of lubricating oil, waste acid and the like.
Preferably, the addition amount of the sodium hydroxide in the step 1) is 0.3-0.4% of the mass of the refined clay. The preferred amount to be added is such that the optimal treatment effect of the present invention is achieved.
Preferably, the bleaching clay in the step 2) is washed 17-18 times. The method is easiest and quick to carry out by using the existing leacher when washing 17-18 times, and the energy efficiency ratio can be optimized.
Preferably, the countercurrent washing described in step 2) is carried out using a countercurrent leacher.
The counter-current washing described in step 2) is performed using a powder leaching device. Preferably the leaching apparatus described in CN 20161135495. X or CN201610908988.0 designed by the inventors of the present invention. The leaching equipment described in cn20161135495. X or CN201610908988.0 can better complete the washing of the powdery clay without granulating the clay.
The liquid separated from the solid and the liquid in the step 3) is firstly stored in a storage tank, the refined clay in the step 2) is firstly fed into the storage tank for full mixing before being washed, and then the washing in the step 2) is carried out after the solid and the liquid are separated. The excessive amount of the refining clay can make the washing liquid reach the maximum dissolution rate. The washing times can be reduced, and the energy consumption is reduced.
Compared with the prior art, the residual oil refining method of the refined clay has the following beneficial effects: the sodium hydroxide is added in the washing process of the refined clay, so that not only can the washing rate of residual oil in the refined clay be improved, but also part of clay activity can be recovered by the clay. The clay can be used for impurity adsorption treatment of lubricating oil, waste acid and the like. The refined clay is first stored in the washing liquid tank before being washed. The excessive amount of the refining clay can make the washing liquid reach the maximum dissolution rate. The washing times can be reduced, and the energy consumption is reduced.
Detailed Description
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and the terms "comprising" and "having" and any variation thereof are intended to cover a non-exclusive inclusion, e.g., a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
Example 1
1) Adding food-grade sodium hydroxide into refined clay generated in the decoloring process of edible oil refining, and uniformly mixing, wherein the adding amount of the sodium hydroxide is 0.3% of the mass of the refined clay;
2) Washing the refined clay mixed with sodium hydroxide by using petroleum ether; washing, then carrying out solid-liquid separation, and drying the solid separated from the solid to recover petroleum ether to obtain the revived clay; the liquid of solid-liquid separation is firstly stored in a storage tank, and the refined clay is firstly fully mixed in the storage tank before washing, and then is subjected to solid-liquid separation and washing; the specific process for washing and refining the carclazyte by using the petroleum ether comprises the following steps: washing the refined clay for 17 times by using a countercurrent leacher, wherein each washing is to wash the refined clay washed for the nth time of the next batch by using part or all of petroleum ether washed for the (n+1) th time except fresh petroleum ether washed for the last time;
3) Concentrating the liquid subjected to solid-liquid separation at the temperature of 75-85 ℃ under normal pressure to recover petroleum ether, and obtaining concentrated solution after concentration to obtain crude oil.
Example 2
1) Adding food-grade sodium hydroxide into refined clay generated in the decoloring process of edible oil refining, and uniformly mixing, wherein the adding amount of the sodium hydroxide is 0.4% of the mass of the refined clay;
2) Washing the refined clay mixed with sodium hydroxide by using petroleum ether; washing, then carrying out solid-liquid separation, and drying the solid separated from the solid to recover petroleum ether to obtain the revived clay; the liquid of solid-liquid separation is firstly stored in a storage tank, and the refined clay is firstly fully mixed in the storage tank before washing, and then is subjected to solid-liquid separation and washing; the specific process for washing and refining the carclazyte by using the petroleum ether comprises the following steps: washing the refined clay for 18 times by using a countercurrent leacher, wherein each washing is to wash the refined clay washed for the nth time of the next batch by using part or all of petroleum ether washed for the (n+1) th time except fresh petroleum ether washed for the last time;
3) Concentrating the liquid subjected to solid-liquid separation at the temperature of 75-85 ℃ under normal pressure to recover petroleum ether, and obtaining concentrated solution after concentration to obtain crude oil.
Example 3
1) Adding food-grade sodium hydroxide into refined clay generated in the decoloring process of edible oil refining, and uniformly mixing, wherein the adding amount of the sodium hydroxide is 0.4% of the mass of the refined clay;
2) Washing the refined clay mixed with sodium hydroxide by using petroleum ether; washing, then carrying out solid-liquid separation, and drying the solid separated from the solid to recover petroleum ether to obtain the revived clay; the liquid of solid-liquid separation is firstly stored in a storage tank, and the refined clay is firstly fully mixed in the storage tank before washing, and then is subjected to solid-liquid separation and washing; the specific process for washing and refining the carclazyte by using the petroleum ether comprises the following steps: washing the refined clay for 12 times by using a countercurrent leacher, wherein each washing is to wash the refined clay washed for the nth time of the next batch by using part or all of petroleum ether washed for the (n+1) th time except fresh petroleum ether washed for the last time;
3) Concentrating the liquid subjected to solid-liquid separation at the temperature of 75-85 ℃ under normal pressure to recover petroleum ether, and obtaining concentrated solution after concentration to obtain crude oil.
Example 4
1) Adding food-grade sodium hydroxide into refined clay generated in the decoloring process of edible oil refining, and uniformly mixing, wherein the adding amount of the sodium hydroxide is 0.03% of the mass of the refined clay;
2) Washing the refined clay mixed with sodium hydroxide by using petroleum ether; washing, then carrying out solid-liquid separation, and drying the solid separated from the solid to recover petroleum ether to obtain the revived clay; the liquid of solid-liquid separation is firstly stored in a storage tank, and the refined clay is firstly fully mixed in the storage tank before washing, and then is subjected to solid-liquid separation and washing; the specific process for washing and refining the carclazyte by using the petroleum ether comprises the following steps: washing the refined clay for 20 times by using a countercurrent leacher, wherein each washing is to wash the refined clay washed for the nth time of the next batch by using part or all of petroleum ether washed for the (n+1) th time except fresh petroleum ether washed for the last time;
3) Concentrating the liquid subjected to solid-liquid separation at the temperature of 75-85 ℃ under normal pressure to recover petroleum ether, and obtaining concentrated solution after concentration to obtain crude oil.
Example 5
1) Adding food-grade sodium hydroxide into refined clay generated in the decoloring process of edible oil refining, and uniformly mixing, wherein the adding amount of the sodium hydroxide is 1% of the mass of the refined clay;
2) Washing the refined clay mixed with sodium hydroxide by using petroleum ether; washing, then carrying out solid-liquid separation, and drying and recovering petroleum ether from the solid subjected to the solid-liquid separation to obtain revived clay; the liquid of solid-liquid separation is firstly stored in a storage tank, and the refined clay is firstly fully mixed in the storage tank before washing, and then is subjected to solid-liquid separation and washing; the specific process for washing and refining the carclazyte by using the petroleum ether comprises the following steps: washing the refining clay for 2 times, and washing the refining clay washed for 1 st time in the next batch by utilizing all petroleum ether subjected to solid-liquid separation after washing for 2 nd time;
3) Concentrating the liquid subjected to solid-liquid separation at the temperature of 75-85 ℃ under normal pressure to recover petroleum ether, and obtaining concentrated solution after concentration to obtain crude oil.
Example 6
The basic steps and process conditions were the same as in example 1) except that the clay was not first stored prior to washing.
Comparative example 1
The basic procedure and process conditions are the same as in example 1) except that no sodium hydroxide is added in step 1).
The residual oil in the dried activated clay in step 2) of examples and comparative examples was detected. And detecting the adsorptivity of the activated clay. The method for detecting the adsorptivity of the activated clay comprises the steps of adding the activated clay in the same proportion (2 wt%) into the same batch of sampling waste engine oil, stirring at the same speed for 10 minutes, and filtering the weight gain ratio of the dried clay.
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Comparative example 1 | |
| Residual oil, percent | 0.3 | 0.3 | 0.5 | 0.6 | 0.9 | 0.7 | 3.8 |
| Weight gain ratio, percent | 21 | 22 | 20 | 19 | 17 | 19 | 6 |
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. A method for refining residual oil of refined clay is characterized in that the refining steps are as follows:
1) Adding food-grade sodium hydroxide into refined clay generated in the decoloring process of edible oil refining, and uniformly mixing, wherein the adding amount of the sodium hydroxide is 0.03% -1% of the mass of the refined clay;
2) Washing the refined clay mixed with sodium hydroxide in the step 1) by using petroleum ether; washing, then carrying out solid-liquid separation, and drying the solid separated from the solid to recover petroleum ether to obtain the revived clay; the specific process for washing and refining the clay by using the petroleum ether in the step 2) comprises the following steps: washing the refined clay for 2-20 times by adopting a countercurrent washing mode, namely: washing the refining clay washed for the nth time of the next batch by using part or all of the petroleum ether washed for the (n+1) th time except the fresh petroleum ether used for the last time;
3) And (3) concentrating the liquid subjected to solid-liquid separation in the step (2) at the normal pressure of 75-85 ℃ to recover petroleum ether, and obtaining concentrated solution after concentration to obtain crude oil.
2. The method for refining the residual oil of the bleaching clay according to claim 1, wherein: the addition amount of the sodium hydroxide in the step 1) is 0.3-0.4% of the mass of the refined clay.
3. The method for refining the residual oil of the bleaching clay according to claim 1, wherein: and (3) washing the refined clay in the step (2) for 17-18 times.
4. The method for refining the residual oil of the bleaching clay according to claim 1, wherein: the countercurrent washing described in step 2) is carried out using a countercurrent leacher.
5. The method for refining the residual oil of the bleaching clay according to claim 1, wherein: the counter-current washing described in step 2) is performed using a powder leaching device.
6. The method for refining the residual oil of the bleaching clay according to claim 1, wherein: the liquid separated from the solid and the liquid in the step 3) is firstly stored in a storage tank, the refined clay in the step 2) is firstly fed into the storage tank for full mixing before being washed, and then the washing in the step 2) is carried out after the solid and the liquid are separated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111648233.9A CN116410819A (en) | 2021-12-31 | 2021-12-31 | Residual oil refining method for refined clay |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111648233.9A CN116410819A (en) | 2021-12-31 | 2021-12-31 | Residual oil refining method for refined clay |
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| CN116410819A true CN116410819A (en) | 2023-07-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013168608A1 (en) * | 2012-05-10 | 2013-11-14 | 日清オイリオグループ株式会社 | Method for producing reclaimed white clay, reclaimed white clay, and method for producing refined fat |
| CN104152273A (en) * | 2014-08-15 | 2014-11-19 | 苏州丰倍生物科技有限公司 | Process method for produced high-quality oleic acid with soybean oil refining waste clay |
| CN105713724A (en) * | 2016-03-31 | 2016-06-29 | 中粮（成都）粮油工业有限公司 | Rapeseed oil refining process |
| CN105907479A (en) * | 2016-06-27 | 2016-08-31 | 丰益油脂科技（天津）有限公司 | New technique for refining waste soil and extracting oil |
| CN206138783U (en) * | 2016-10-18 | 2017-05-03 | 淄博中萃生物科技有限公司 | Leach equipment suitable for powder |
| CN106669221A (en) * | 2016-10-18 | 2017-05-17 | 淄博中萃生物科技有限公司 | Leaching equipment applicable to powder and application thereof |
-
2021
- 2021-12-31 CN CN202111648233.9A patent/CN116410819A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013168608A1 (en) * | 2012-05-10 | 2013-11-14 | 日清オイリオグループ株式会社 | Method for producing reclaimed white clay, reclaimed white clay, and method for producing refined fat |
| CN104152273A (en) * | 2014-08-15 | 2014-11-19 | 苏州丰倍生物科技有限公司 | Process method for produced high-quality oleic acid with soybean oil refining waste clay |
| CN105713724A (en) * | 2016-03-31 | 2016-06-29 | 中粮（成都）粮油工业有限公司 | Rapeseed oil refining process |
| CN105907479A (en) * | 2016-06-27 | 2016-08-31 | 丰益油脂科技（天津）有限公司 | New technique for refining waste soil and extracting oil |
| CN206138783U (en) * | 2016-10-18 | 2017-05-03 | 淄博中萃生物科技有限公司 | Leach equipment suitable for powder |
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Non-Patent Citations (2)
| Title |
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