CN114105201A - Preparation and application method of high-efficiency nontoxic heavy poly sodium tungstate liquid - Google Patents
Preparation and application method of high-efficiency nontoxic heavy poly sodium tungstate liquid Download PDFInfo
- Publication number
- CN114105201A CN114105201A CN202111183930.1A CN202111183930A CN114105201A CN 114105201 A CN114105201 A CN 114105201A CN 202111183930 A CN202111183930 A CN 202111183930A CN 114105201 A CN114105201 A CN 114105201A
- Authority
- CN
- China
- Prior art keywords
- heavy liquid
- sodium
- preparation
- density
- application method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G41/00—Compounds of tungsten
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/44—Application of particular media therefor
- B03B5/442—Application of particular media therefor composition of heavy media
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/90—Other properties not specified above
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention relates to a preparation and application method of high-efficiency nontoxic heavy poly sodium tungstate liquid, which comprises the steps of adding sodium hydroxide and tungstic acid into water; controlling the reaction temperature to be 85-100 ℃; adding acid to adjust the pH value of the solution to 1-4; concentrating the reaction solution to density of 1.10-1.35g/cm3Ending the reaction; filtering the reaction solution, adding ethanol into the filtrate, standing, settling, and drying to obtain a solid sodium tungstate product; dissolving the sodium polytungstate product in water to obtain a solution with a density in the range of 1.0-3.1g/cm3The heavy liquid of (4); carrying out ore dressing by adjusting the density of the heavy liquid; and (5) recovering heavy liquid. The preparation and application method of the heavy liquid of sodium tungstate is simple in process and safe to operate; the density of the heavy liquid of sodium polytungstate is easy to adjust in the application range, the chemical property is stable, the transparency is high, and the heavy liquid is harmless to the environment and human body, and is a good substitute of organic toxic heavy liquid.
Description
Technical Field
The invention belongs to the technical field of heavy liquid preparation, particularly relates to a method for preparing nontoxic heavy liquid, and particularly relates to a method for preparing efficient nontoxic sodium polytungstate heavy liquid and an application method thereof.
Background
The common heavy liquid is divided into organic heavy liquid and inorganic heavy liquid. Common heavy inorganic liquids are nitrates or halides of mercury, silver, thallium, tin, antimony. Such as Dulien liquid (aqueous solution of mercuric iodide and potassium iodide at a ratio of 1.24: 1, density of 3.19 g/cm)3) The heavy liquid belongs to salts with low melting temperature and mixtures thereof, has the defect that the temperature of the heavy liquid must be increased when in use, and most of the heavy liquid is easy to react with water and minerals and extremely toxic. Common heavy organic liquids are halogenated hydrocarbons, such as diiodomethane (density 3.32 g/cm)3) Tetrabromoethane (density of 2.97 g/cm)3) Tribromofluoromethane (density 2.75 g/cm)3) And the like, such compounds are volatile and toxic.
The ideal heavy liquid is required to have the advantages of minimum volatility, good transparency, stable chemical property, proper viscosity, and no toxicity or odor as far as possible. At present, the non-toxic heavy liquid in the known heavy liquids comprises cerium silicotungstate, iron metatungstate and the like, and the heavy liquids belong to the heavy liquid of soluble salt aqueous solution, wherein the cerium silicotungstate is used as the heavy liquid, dichloroethanol is used as a solvent for heating, and the highest density of the iron metatungstate heavy liquid only reaches 2.80g/cm3. In order to meet the requirements of markets and related industries on the nontoxic heavy liquid, the invention researches the preparation and application methods of the nontoxic heavy liquid of sodium polytungstate.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation method and an application method of high-efficiency nontoxic sodium polytungstate heavy liquid, which can be used for heavy liquid beneficiation. The heavy liquid of sodium polytungstate prepared by the method is a novel nontoxic heavy liquid, can be dissolved at room temperature by taking water as a solvent, has the density of 3.1g/cm3, and meets the requirements on the toxicity, the use conditions and the density of the heavy liquid.
The purpose of the invention is realized by the following technical scheme:
a preparation and application method of high-efficiency nontoxic heavy poly sodium tungstate liquid comprises the following steps:
A. adding sodium hydroxide and tungstic acid to water;
B. controlling the reaction temperature;
C. adding acid with a certain concentration to adjust the pH value of the solution to 1-4, and continuing to react;
D. concentrating the reaction liquid to a certain density, and finishing the reaction;
E. filtering the reaction solution, adding alcohol into the filtrate, standing for settling, and drying to obtain a solid sodium tungstate product;
F. dissolving the poly sodium tungstate product in water to obtain heavy liquid with different density ranges;
G. adding various ores with different densities into the heavy liquid, and performing ore dressing by adjusting the density of the heavy liquid;
H. and (5) recycling the heavy liquid.
Further, in the step A, the volume of the water is 45-100mL, the mass of the sodium hydroxide is 2.72-3.0g, and the mass of the tungstic acid is 8.0-8.5 g.
Further, step B, the reaction temperature is kept between 85 and 100 ℃ by controlling the reaction temperature rising rate.
Further, in the step C, the acid is dilute nitric acid, dilute sulfuric acid or dilute hydrochloric acid, and the concentration of the acid is 1.30-1.38 mol/L.
Further, step D, concentrating the reaction solution to a density of 1.10-1.35g/cm3。
Further, step E, the alcohol is methanol, ethanol or ethylene glycol.
Further, in step F, the density of the heavy liquid ranges from 1.0 to 3.1g/cm3The pH value is 4-6, and the use temperature is-5-50 ℃.
Further, step G, the ore is apatite, grape stone, amethyst, pink crystal, and obsidian.
Further, in the step H, the heavy liquid can be recycled by evaporating water to obtain a sodium polytungstate product again.
Compared with the prior art, the invention has the beneficial effects that:
the preparation method of the heavy liquid of sodium polytungstate has simple process and safe operation; the density of the heavy liquid of sodium polytungstate is easy to adjust in the application range, the chemical property is stable, the transparency is high, and the heavy liquid is harmless to the environment and human body, and is a good substitute of organic toxic heavy liquid.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow diagram of ore separation.
Detailed Description
The invention is further illustrated by the following examples:
the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
The preparation and application method of the heavy liquid of sodium polytungstate comprises three steps of synthesis of sodium polytungstate hydrate, preparation of the heavy liquid of sodium polytungstate and application of the heavy liquid. Wherein the preparation of the sodium polytungstate hydrate comprises the following steps: dissolving reaction raw materials into a certain amount of distilled water; controlling the reaction temperature; adjusting the pH value of the reaction; concentrating the reaction solution to a certain density; treating the reaction solution and drying the product; the preparation of the heavy liquid of the sodium polytungstate takes water as a solvent, solid sodium polytungstate is dissolved in the water to prepare a heavy liquid of water solution, and the heavy liquid with different densities is prepared for mineral separation. The pH value of the heavy liquid is 4-6, the density range of the heavy liquid can be 1.0-3.1g/cm3, and the using temperature is-5-50 ℃. The solubility of sodium polytungstate hydrate and the density of sodium polytungstate heavy liquid are influenced by the initial reaction concentration, the reaction pH value, the reaction temperature and the reaction concentration density. The application steps of the heavy liquid are as follows: and (3) putting a plurality of ores with different densities into heavy liquid with a certain density at the same time, and floating or sinking the ores according to the different densities. The experiment was repeated with varying heavy liquid density.
The method comprises the following specific steps:
A. adding 2.72-3.0g of sodium hydroxide and 8.0-8.5g of tungstic acid into 45-100mL of water;
B. controlling the experimental reaction temperature to be 85-100 ℃;
C. the experimental temperature is in the range of 85-100 ℃, and dilute nitric acid with the concentration of 1.30-1.38mol/L is added to adjust the pH value of the solution to 1-4;
D. concentrating the reaction solution to a density of 1.10-1.35g/cm3Ending the reaction;
E. filtering the reaction solution, adding ethanol into the filtrate, standing, settling, and drying to obtain a solid sodium tungstate product;
F. the sodium polytungstate product is dissolved in water to obtain the product with the density ranging from 1.0 to 3.1g/cm3The heavy liquid of (4);
G. and adding various ores with different densities into the heavy liquid, and performing ore dressing by adjusting the density of the heavy liquid.
H. And (4) recovering the heavy liquid after beneficiation by evaporating water.
Example 1
The various raw material addition amounts and control variable conditions are as in number 1 of table 1. The specific operation steps are as follows: distilled water, sodium hydroxide and tungstic acid (2.86 g of sodium hydroxide, 85mL of water, 8.5g of tungstic acid) were added to a three-necked flask equipped with a stirrer, and heated using an electric heating mantle. ControlThe reaction temperature is 85-100 ℃, 50mL of dilute nitric acid (the concentration is 1.30-1.38mol/L) is dripped into the bottle until the pH value of the reaction solution is 1-2. The reaction was continued, and the density of the reaction solution was concentrated to 1.35g/cm3When the reaction is completed, the reaction is terminated. Filtering the reaction solution, adding ethanol into the filtrate, standing and settling to obtain a product, and drying in an oven at 80 ℃. The resulting product was dissolved in water for density testing.
The preparation steps of the other experimental heavy sodium tungstate liquids are as described above, and the reaction conditions numbered 1, 2 and 3 in table 1 are adopted, so that the obtained heavy sodium tungstate liquids have higher density.
TABLE 1
| Numbering | water/mL | Dilute nitric acid/mL | pH | Concentration density/g.cm-3 |
| 1 | 85 | 50 | 1-2 | 1.35 |
| 2 | 85 | 45 | 2-3 | 1.35 |
| 3 | 85 | 43 | 3-4 | 1.35 |
| 4 | 85 | 38 | 5-6 | 1.35 |
| 5 | 85 | 29.4 | 7-8 | 1.35 |
Example 2
The various raw material addition amounts and control variable conditions are as in number 1 of table 2. The specific operation steps are as follows: distilled water, sodium hydroxide and tungstic acid (2.86 g of sodium hydroxide, 100mL of water, 8.5g of tungstic acid) were added to a three-necked flask equipped with a stirrer, and heated using an electric heating mantle. Controlling the reaction temperature at 85-100 ℃, and dripping 43mL of dilute nitric acid (the concentration is 1.30-1.38mol/L) into the bottle until the pH value of the reaction solution is 3-4. The reaction was continued, and the density of the reaction solution was concentrated to 1.25g/cm3When the reaction is completed, the reaction is terminated. Filtering the reaction solution, adding ethanol into the filtrate, standing and settling to obtain a product, and drying in an oven at 80 ℃. The resulting product was dissolved in water for density testing.
The preparation steps of the heavy liquid of sodium polytungstate for other experiments are as described above, and the reaction conditions numbered as 1, 2, 3 and 4 in the table 2 are adopted, so that the obtained heavy liquid of sodium polytungstate has higher density.
TABLE 2
| Numbering | water/mL | Dilute nitric acid/mL | pH | Concentration density/g.cm-3 |
| 1 | 100 | 43 | 3-4 | 1.25 |
| 2 | 85 | 43 | 3-4 | 1.25 |
| 3 | 64 | 43 | 3-4 | 1.25 |
| 4 | 45 | 43 | 3-4 | 1.25 |
| 5 | 22 | 43 | 3-4 | 1.25 |
Example 3
The various raw material addition amounts and control variable conditions are as in number 1 of table 3. The specific operation steps are as follows: distilled water, sodium hydroxide and tungstic acid (2.86 g of sodium hydroxide, 85mL of water, 8.5g of tungstic acid) were added to a three-necked flask equipped with a stirrer, and heated using an electric heating mantle. Controlling the reaction temperature at 85-100 ℃, and dripping 43mL of dilute nitric acid (the concentration is 1.30-1.38mol/L) into the bottle until the pH value of the reaction solution is 3-4. The reaction was continued, and the density of the reaction solution was concentrated to 1.15g/cm3When the reaction is completed, the reaction is terminated. Filtering the reaction solution, adding ethanol into the filtrate, standing and settling to obtain a product, and drying in an oven at 80 ℃. The resulting product was dissolved in water for density testing.
The preparation steps of the heavy liquid of sodium polytungstate for other experiments are as described above, and the reaction conditions numbered as 1, 2, 3, 4 and 5 in the table 3 are adopted, so that the obtained heavy liquid of sodium polytungstate has higher density.
TABLE 3
| Numbering | water/mL | Dilute nitric acid/mL | pH | Concentration density/g.cm-3 |
| 1 | 85 | 43 | 3-4 | 1.10 |
| 2 | 85 | 43 | 3-4 | 1.20 |
| 3 | 85 | 43 | 3-4 | 1.25 |
| 4 | 85 | 43 | 3-4 | 1.30 |
| 5 | 85 | 43 | 3-4 | 1.35 |
| 6 | 85 | 43 | 3-4 | 1.45 |
| 7 | 85 | 43 | 3-4 | 1.55 |
Example 4
An example of the use of the heavy liquid of sodium polytungstate is shown in table 4 and fig. 1. The specific operation steps are as follows: dissolving sodium polytungstate hydrate in water to make its density reach 3.1g/cm3(solubility of sodium polytungstate is 6g/mL water). Five ores with different densities (the densities of the five ore types are shown in the table 4) are added into the beaker, and the density of the heavy liquid reaches 3.1g/cm3The apatite settles at the bottom of the liquid in the beaker, and other four ores float upwards; adding distilled water into the beaker to dilute the heavy liquid, and reducing the density of the heavy liquid to 2.77g/cm3The apatite and the grape stone are settled at the bottom of the liquid in the beaker, and the other three kinds of ores float on the surface of the liquid; distilled water is continuously added into the beaker for dilution, and the density of the heavy liquid is reduced to 2.65g/cm3The apatite, the grape stone and the amethyst are settled at the bottom of the liquid in the beaker, and the other two kinds of ores float on the liquid surface; distilled water is continuously added into the beaker for dilution, and the density of the heavy liquid is reduced to 2.58g/cm3Apatite, grape stone, amethyst and pink crystal are settled at the bottom of the beaker liquid, and obsidian floats on the surface of the liquid; distilled water is continuously added into the beaker for dilution, and the density of the heavy liquid is reduced to 2.30g/cm3The apatite, grape stone, amethyst, pink crystal and obsidian are all settled at the bottom of the beaker liquid.
TABLE 4
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A preparation and application method of high-efficiency nontoxic heavy poly sodium tungstate liquid is characterized by comprising the following steps:
A. adding sodium hydroxide and tungstic acid to water;
B. controlling the reaction temperature;
C. adding acid with a certain concentration to adjust the pH value of the solution to 1-4, and continuing to react;
D. concentrating the reaction liquid to a certain density, and finishing the reaction;
E. filtering the reaction solution, adding alcohol into the filtrate, standing for settling, and drying to obtain a solid sodium tungstate product;
F. dissolving the poly sodium tungstate product in water to obtain heavy liquid with different density ranges;
G. adding various ores with different densities into the heavy liquid, and performing ore dressing by adjusting the density of the heavy liquid;
H. and (5) recycling the heavy liquid.
2. The preparation and application method of the high-efficiency nontoxic heavy liquid of sodium polytungstate according to claim 1, characterized in that: step A, the volume of the water is 45-100mL, the mass of the sodium hydroxide is 2.72-3.0g, and the mass of the tungstic acid is 8.0-8.5 g.
3. The preparation and application method of the high-efficiency nontoxic heavy liquid of sodium polytungstate according to claim 1, characterized in that: and step B, controlling the reaction temperature, and keeping the reaction temperature at 85-100 ℃ by controlling the reaction temperature rise rate.
4. The preparation and application method of the high-efficiency nontoxic heavy liquid of sodium polytungstate according to claim 1, characterized in that: and C, the acid is dilute nitric acid, dilute sulfuric acid or dilute hydrochloric acid, the concentration is 1.30-1.38mol/L, and the pH value of the reaction solution is adjusted to 1-4.
5. The high-efficiency nontoxic heavy liquid of poly sodium tungstate as claimed in claim 1The preparation and application method is characterized in that: step D, concentrating the reaction solution to the density of 1.10-1.35g/cm3。
6. The preparation and application method of the high-efficiency nontoxic heavy liquid of sodium polytungstate according to claim 1, characterized in that: and E, the alcohol is methanol, ethanol or ethylene glycol.
7. The preparation and application method of the high-efficiency nontoxic heavy liquid of sodium polytungstate according to claim 1, characterized in that: step F, dissolving the sodium polytungstate product in water to obtain heavy liquid with the density range of 1.0-3.1g/cm3The pH value is 4-6, and the use temperature is-5-50 ℃.
8. The preparation and application method of the high-efficiency nontoxic heavy liquid of sodium polytungstate according to claim 1, characterized in that: and G, the ores are apatite, grape stone, amethyst, pink crystal and obsidian.
9. The preparation and application method of the high-efficiency nontoxic heavy liquid of sodium polytungstate according to claim 1, characterized in that: and H, evaporating the water content of the heavy liquid to obtain a sodium polytungstate product again, and recycling the sodium polytungstate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111183930.1A CN114105201B (en) | 2021-10-11 | 2021-10-11 | A kind of application method of nontoxic sodium polytungstate heavy liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111183930.1A CN114105201B (en) | 2021-10-11 | 2021-10-11 | A kind of application method of nontoxic sodium polytungstate heavy liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114105201A true CN114105201A (en) | 2022-03-01 |
| CN114105201B CN114105201B (en) | 2023-07-07 |
Family
ID=80441687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111183930.1A Active CN114105201B (en) | 2021-10-11 | 2021-10-11 | A kind of application method of nontoxic sodium polytungstate heavy liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114105201B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353879A (en) * | 1981-05-07 | 1982-10-12 | Gte Products Corporation | Tungsten recovery from tungsten ore concentrates by caustic digestion |
| US5178848A (en) * | 1991-06-25 | 1993-01-12 | Bhp-Utah International Corp. | Lithium metatungstate |
| CN102781841A (en) * | 2010-03-05 | 2012-11-14 | 国立大学法人名古屋大学 | The preparation method of ammonium tungstate aqueous solution |
| CN108516588A (en) * | 2018-04-20 | 2018-09-11 | 中南大学 | A method of preparing tungsten product from coarse sodium tungstate |
| CN109019691A (en) * | 2018-10-10 | 2018-12-18 | 江西省修水赣北钨业有限公司 | A kind of preparation process of ammonium paratungstate |
| CN109052477A (en) * | 2018-10-18 | 2018-12-21 | 谭琴 | A kind of sodium tungstate preparation process being used to prepare ammonium paratungstate |
| CN109824087A (en) * | 2019-03-21 | 2019-05-31 | 厦门钨业股份有限公司 | A kind of method and apparatus producing sodium tungstate |
-
2021
- 2021-10-11 CN CN202111183930.1A patent/CN114105201B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353879A (en) * | 1981-05-07 | 1982-10-12 | Gte Products Corporation | Tungsten recovery from tungsten ore concentrates by caustic digestion |
| US5178848A (en) * | 1991-06-25 | 1993-01-12 | Bhp-Utah International Corp. | Lithium metatungstate |
| CN102781841A (en) * | 2010-03-05 | 2012-11-14 | 国立大学法人名古屋大学 | The preparation method of ammonium tungstate aqueous solution |
| CN108516588A (en) * | 2018-04-20 | 2018-09-11 | 中南大学 | A method of preparing tungsten product from coarse sodium tungstate |
| CN109019691A (en) * | 2018-10-10 | 2018-12-18 | 江西省修水赣北钨业有限公司 | A kind of preparation process of ammonium paratungstate |
| CN109052477A (en) * | 2018-10-18 | 2018-12-21 | 谭琴 | A kind of sodium tungstate preparation process being used to prepare ammonium paratungstate |
| CN109824087A (en) * | 2019-03-21 | 2019-05-31 | 厦门钨业股份有限公司 | A kind of method and apparatus producing sodium tungstate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114105201B (en) | 2023-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108311117B (en) | Magnetic biochar material for heavy metal wastewater treatment and preparation method thereof | |
| CN105084511A (en) | Method for degrading organic waste water by activating persulfate through manganese-cobalt composite oxide | |
| CN108355611B (en) | A kind of MOF complex, its synthesis and its application in adsorbing organic dyes in wastewater | |
| CN115106112A (en) | Preparation method of 3D cobalt sulfide cocatalyst and application of cocatalyst in Fenton reaction | |
| CN107262072A (en) | A kind of industrial preparation method of zirconium-loaded nanocomposite resin adsorbent | |
| CN103230802A (en) | Preparation method of composite photocatalyst with visible light response and arsenic removing method | |
| CN114105201A (en) | Preparation and application method of high-efficiency nontoxic heavy poly sodium tungstate liquid | |
| CN108579755A (en) | A kind of wastewater treatment catalyst and its application | |
| CN105396605A (en) | Preparation method of silicate clay/copper/carbon nitride composite material | |
| CN104941667A (en) | Petal-shaped magnetic ferric oxide molybdenum sulfide compound and preparation method thereof | |
| CN108355700A (en) | Polyoxometallate and its compound, preparation method and application | |
| CN108358299A (en) | A kind for the treatment of process of ozone catalytic degradation of dye waste water | |
| CN114349133B (en) | Preparation method of copper sulfide electrode material and application of copper sulfide electrode material in sewage copper extraction | |
| CN108620081A (en) | A kind of hydrogenation catalyst maceration extract and preparation method thereof | |
| CN103509946B (en) | Method for vulcanizing low-grade oxidized nickel ore with microbiological method | |
| CN109012701B (en) | Zinc sulfide copper photocatalyst for treating printing and dyeing wastewater and preparation method thereof | |
| CN111592029A (en) | Preparation method of rod-shaped silver-plated cerium dioxide | |
| CN111792700A (en) | Application and removal method of BiOBr or oxygen vacancy BiOBr in removing algal organic matter | |
| CN111440354A (en) | A kind of preparation method and application of bisphenol A molecularly imprinted composite membrane through hierarchical pore structure | |
| CN115259372A (en) | A kind of material for denitrification by autotrophic denitrification and its preparation method and application | |
| CN109985638A (en) | A method for a layered and bonded spherical zinc sulfide/tin disulfide core-shell heterojunction photocatalyst with visible light response | |
| CN104085872B (en) | A kind of preparation method of rhombus hollow silver phosphotungstate rod | |
| CN114289038A (en) | BiOCl rich in defects0.5I0.5Solid solution photocatalyst and preparation method and application thereof | |
| CN105032401A (en) | Method for rapidly preparing snowflake cerium molybdate through microwave radiation | |
| CN113600205A (en) | A copper-based Cu-Al2O3 catalyst and its application in the treatment of estrogen-containing wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |