CN115072781A - Ammonium tetramolybdate and preparation process thereof - Google Patents
Ammonium tetramolybdate and preparation process thereof Download PDFInfo
- Publication number
- CN115072781A CN115072781A CN202210493266.9A CN202210493266A CN115072781A CN 115072781 A CN115072781 A CN 115072781A CN 202210493266 A CN202210493266 A CN 202210493266A CN 115072781 A CN115072781 A CN 115072781A
- Authority
- CN
- China
- Prior art keywords
- ammonium
- slurry
- ammonium tetramolybdate
- tetramolybdate
- size mixing
- 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.)
- Pending
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 56
- 238000002156 mixing Methods 0.000 claims abstract description 42
- 239000000243 solution Substances 0.000 claims abstract description 25
- 239000011259 mixed solution Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 14
- 235000015393 sodium molybdate Nutrition 0.000 claims abstract description 12
- 239000011684 sodium molybdate Substances 0.000 claims abstract description 12
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 10
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical class [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 9
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 9
- 239000012452 mother liquor Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical group [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 10
- 150000003863 ammonium salts Chemical class 0.000 abstract description 6
- 229910021529 ammonia Inorganic materials 0.000 abstract description 5
- 238000003916 acid precipitation Methods 0.000 abstract description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 9
- 239000011733 molybdenum Substances 0.000 description 8
- 229910052750 molybdenum Inorganic materials 0.000 description 8
- 239000000047 product Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 4
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 3
- 235000018660 ammonium molybdate Nutrition 0.000 description 3
- 239000011609 ammonium molybdate Substances 0.000 description 3
- 229940010552 ammonium molybdate Drugs 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 2
- 238000005342 ion exchange 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
- AUNAPVYQLLNFOI-UHFFFAOYSA-L [Pb++].[Pb++].[Pb++].[O-]S([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Mo]([O-])(=O)=O Chemical compound [Pb++].[Pb++].[Pb++].[O-]S([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Mo]([O-])(=O)=O AUNAPVYQLLNFOI-UHFFFAOYSA-L 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005078 molybdenum compound Substances 0.000 description 1
- 150000002752 molybdenum compounds Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
-
- 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 the technical field of ammonium tetramolybdate, and provides a preparation process of ammonium tetramolybdate, which comprises the following steps: s1, adding an ammonium source into the sodium molybdate solution to obtain a mixed solution; s2, heating the mixed solution obtained in the step S1, and then adding concentrated nitric acid for reaction to obtain rough ammonium tetramolybdate slurry; s3, draining the rough ammonium tetramolybdate slurry obtained in the step S2, mixing the rough ammonium tetramolybdate slurry with a saturated ammonium chloride solution to obtain a size mixing slurry, carrying out size mixing washing to obtain a treated slurry and a size mixing mother liquor, and returning the size mixing mother liquor to the step S1 to serve as an ammonium source; s4, after the treated slurry obtained in the step S3 is pumped to be dry, the slurry is washed by brine-free water to obtain ammonium tetramolybdate; the preparation process provided by the invention is simple in process and simple to operate, ammonia or ammonium salt is directly added into a sodium molybdate solution, ammonium tetramolybdate is prepared by an acid precipitation one-step method, crude ammonium tetramolybdate is obtained, and then ammonium salt is adopted for washing, so that a pure ammonium tetramolybdate product is obtained.
Description
Technical Field
The invention relates to the technical field of ammonium tetramolybdate, and particularly relates to ammonium tetramolybdate and a preparation process thereof.
Background
Ammonium tetramolybdate (Ammoinum Tetramolybdate) is an important intermediate product of molybdenum deep processing products and has wide application. Different ammonium molybdate products can be used as catalysts for petroleum industry and artificial wool, trace element fertilizers, fabric fire retardants, flame retardants, raw materials for manufacturing ceramic pigments, pigments (molybdenum red, dyeing assistants) and other molybdenum compounds, and can be used for manufacturing molybdenum strips, molybdenum wires, molybdenum sheets, molybdenum powder and the like in metallurgical industry.
The current conventional methods for ammonium tetramolybdate are classified into the following two types: 1. taking molybdenum calcine as a raw material, and preparing an ammonium tetramolybdate product through ammonia leaching, impurity removal and acid precipitation; 2. and (3) taking secondary resources as raw materials to obtain a crude sodium molybdate solution, removing impurities from the sodium molybdate solution through ion exchange, preparing an ammonium molybdate solution through ammonium salt resolution transformation, and preparing an ammonium tetramolybdate product through acid precipitation.
Both of the above methods have certain drawbacks.
Aiming at the first method, ammonium tetramolybdate is prepared by ammonia leaching molybdenum roasting through a classical process, under the condition that high-quality and high-grade molybdenum concentrate is less and less, the adaptability of the ammonium tetramolybdate is gradually reduced, the ammonia nitrogen environmental protection risk caused by the ammonia leaching process is larger, and the process is gradually desalted; aiming at the second method, molybdenum secondary resources are used as raw materials, sodium molybdate solution is prepared, impurities are removed through ion exchange, and pure ammonium molybdate solution is obtained through ammonium salt analysis to prepare ammonium tetramolybdate.
Content of application
The invention provides ammonium tetramolybdate and a preparation process thereof, which can effectively solve the problems.
The embodiment of the invention is realized by the following technical scheme:
a preparation process of ammonium tetramolybdate comprises the following steps:
s1, adding an ammonium source into the sodium molybdate solution to obtain a mixed solution;
s2, heating the mixed solution obtained in the step S1, and then adding concentrated nitric acid for reaction to obtain rough ammonium tetramolybdate slurry;
s3, draining the rough ammonium tetramolybdate slurry obtained in the step S2, mixing the rough ammonium tetramolybdate slurry with a saturated ammonium chloride solution to obtain a size mixing slurry, carrying out size mixing washing to obtain a treated slurry and a size mixing mother liquor, and returning the size mixing mother liquor to the step S1 to serve as an ammonium source;
s4, after the treated slurry obtained in the step S3 is pumped to dryness, the slurry is washed by brine-free water to obtain ammonium tetramolybdate.
The ammonium tetramolybdate and the preparation process thereof provided by the invention have the following beneficial effects:
the preparation process provided by the invention is simple in process and simple to operate, ammonia or ammonium salt is directly added into a sodium molybdate solution, ammonium tetramolybdate is prepared by an acid precipitation one-step method, crude ammonium tetramolybdate is obtained, and then ammonium salt is adopted for washing, so that a pure ammonium tetramolybdate product is obtained.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The specific embodiment provides a preparation process of ammonium tetramolybdate, which comprises the following steps:
s1, adding an ammonium source into the sodium molybdate solution to obtain a mixed solution;
s2, heating the mixed solution obtained in the step S1, and then adding concentrated nitric acid for reaction to obtain rough ammonium tetramolybdate slurry;
s3, draining the rough ammonium tetramolybdate slurry obtained in the step S2, mixing the rough ammonium tetramolybdate slurry with a saturated ammonium chloride solution to obtain a size mixing slurry, carrying out size mixing washing to obtain a treated slurry and a size mixing mother liquor, and returning the size mixing mother liquor to the step S1 to serve as an ammonium source;
s4, after the treated slurry obtained in the step S3 is pumped to dryness, the slurry is washed by brine-free water to obtain ammonium tetramolybdate.
In step S1, the ammonium source is ammonia water or a saturated ammonium chloride solution.
In step S1, Mo: NH (NH) 4 ＝1：(0.6-1.5)。
Wherein, in step S1, the concentration of Mo in the mixed liquid is 50-200 g/L.
In step S2, the temperature of the mixture was raised to 90 ℃.
In step S2, the mixed solution is added with concentrated nitric acid, and the pH value is 1-2.
Wherein, in the step S2, the reaction time is 0.5h-1 h.
In step S3, the solid-to-liquid ratio in the slurry mixing liquid is 1: (1-5).
Wherein, in the step S3, the temperature of the size mixing liquid is 90-100 ℃, the pressure is 0-0.1MPa, and the time of size mixing and washing is 0.5-1 h.
Example 1
This example was used to prepare ammonium tetramolybdate and included the following steps:
s1, adding ammonia water into the sodium molybdate solution to obtain a mixed solution, wherein in the mixed solution, the molar ratio of Mo: NH (NH) 4 1: 1, the concentration of Mo in the mixed solution is 150 g/L;
s2, heating the mixed solution obtained in the step S1 to 90 ℃, adding concentrated nitric acid until the pH value is 1.5, and reacting for 0.7 hour to obtain rough ammonium tetramolybdate slurry;
s3, after the rough ammonium tetramolybdate slurry obtained in the step S2 is pumped to be dry, mixing the rough ammonium tetramolybdate slurry with a saturated ammonium chloride solution to obtain a slurry adjusting liquid, wherein the solid-to-liquid ratio in the slurry adjusting liquid is 1: 3, carrying out size mixing washing, wherein the temperature of the size mixing liquid is 95 ℃, the pressure is 0.05MPa, and the time of the size mixing washing is 0.7h, so as to obtain treated slurry and size mixing mother liquid, and returning the size mixing mother liquid to the step S1 to serve as an ammonium source;
s4, after the treated slurry obtained in the step S3 is drained, the slurry is washed by brine-free water to obtain ammonium tetramolybdate A1.
Example 2
This example was used to prepare ammonium tetramolybdate and included the following steps:
s1, adding ammonia water into the sodium molybdate solution to obtain a mixed solution, wherein in the mixed solution, the molar ratio of Mo: NH (NH) 4 1: 0.6, the concentration of Mo in the mixed solution is 50 g/L;
s2, heating the mixed solution obtained in the step S1 to 90 ℃, adding concentrated nitric acid until the pH value is 1, and reacting for 0.5h to obtain rough ammonium tetramolybdate slurry;
s3, after the rough ammonium tetramolybdate slurry obtained in the step S2 is pumped to be dry, mixing the rough ammonium tetramolybdate slurry with a saturated ammonium chloride solution to obtain a slurry adjusting liquid, wherein the solid-to-liquid ratio in the slurry adjusting liquid is 1: 1, carrying out size mixing washing, wherein the temperature of size mixing liquid is 90 ℃, the pressure is 0.01MPa, and the time of size mixing washing is 0.5h, so as to obtain treated slurry and size mixing mother liquid, and returning the size mixing mother liquid to the step S1 to serve as an ammonium source;
s4, after the treated slurry obtained in the step S3 is drained, the slurry is washed by brine-free water to obtain ammonium tetramolybdate A2.
Example 3
This example was used to prepare ammonium tetramolybdate and included the following steps:
s1, adding ammonia water into the sodium molybdate solution to obtain a mixed solution, wherein in the mixed solution, the molar ratio of Mo: NH (NH) 4 1: 1.5, the concentration of Mo in the mixed solution is 200 g/L;
s2, heating the mixed solution obtained in the step S1 to 90 ℃, adding concentrated nitric acid until the pH value is 2, and reacting for 1h to obtain rough ammonium tetramolybdate slurry;
s3, after the rough ammonium tetramolybdate slurry obtained in the step S2 is pumped to be dry, mixing the rough ammonium tetramolybdate slurry with a saturated ammonium chloride solution to obtain a slurry adjusting liquid, wherein the solid-to-liquid ratio in the slurry adjusting liquid is 1: 5, carrying out size mixing washing, wherein the temperature of the size mixing liquid is 100 ℃, the pressure is 0.1MPa, the time of the size mixing washing is 1h, so as to obtain treated slurry and size mixing mother liquid, and returning the size mixing mother liquid to the step S1 to serve as an ammonium source;
s4, after the treated slurry obtained in the step S3 is drained, the slurry is washed by brine-free water to obtain ammonium tetramolybdate A3.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation process of ammonium tetramolybdate is characterized by comprising the following steps:
s1, adding an ammonium source into the sodium molybdate solution to obtain a mixed solution;
s2, heating the mixed solution obtained in the step S1, and then adding concentrated nitric acid for reaction to obtain rough ammonium tetramolybdate slurry;
s3, draining the rough ammonium tetramolybdate slurry obtained in the step S2, mixing the rough ammonium tetramolybdate slurry with a saturated ammonium chloride solution to obtain a size mixing slurry, carrying out size mixing washing to obtain a treated slurry and a size mixing mother liquor, and returning the size mixing mother liquor to the step S1 to serve as an ammonium source;
s4, after the treated slurry obtained in the step S3 is pumped to dryness, the slurry is washed by brine-free water to obtain ammonium tetramolybdate.
2. The process for preparing ammonium tetramolybdate according to claim 1, wherein the ammonium source is ammonia water or a saturated ammonium chloride solution in step S1.
3. The process for preparing ammonium tetramolybdate according to claim 1, wherein in step S1, Mo: NH (NH) 4 ＝1：(0.6-1.5)。
4. The process according to claim 1, wherein in step S1, the concentration of Mo in the mixed solution is 50-200 g/L.
5. The process according to claim 1, wherein the temperature of the mixed solution is raised to 90 ℃ in step S2.
6. The process of claim 1, wherein in step S2, the mixed solution is added with concentrated nitric acid to obtain a pH of 1-2.
7. The process for preparing ammonium tetramolybdate according to claim 1, wherein the reaction time is 0.5h to 1h in step S2.
8. The process for preparing ammonium tetramolybdate according to claim 1, wherein in step S3, the solid-to-liquid ratio in the slurry is 1: (1-5).
9. The process of claim 1, wherein in step S3, the temperature of the slurry is 90-100 ℃, the pressure is 0-0.1MPa, and the time for slurry mixing and washing is 0.5-1 h.
10. Ammonium tetramolybdate produced by the process for the preparation of ammonium tetramolybdate according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210493266.9A CN115072781A (en) | 2022-05-07 | 2022-05-07 | Ammonium tetramolybdate and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210493266.9A CN115072781A (en) | 2022-05-07 | 2022-05-07 | Ammonium tetramolybdate and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115072781A true CN115072781A (en) | 2022-09-20 |
Family
ID=83247894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210493266.9A Pending CN115072781A (en) | 2022-05-07 | 2022-05-07 | Ammonium tetramolybdate and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115072781A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3899284A (en) * | 1973-04-19 | 1975-08-12 | Noranda Mines Ltd | Form of ammonium tetramolybdate and method of preparation |
| DE3445726A1 (en) * | 1984-05-15 | 1985-11-21 | TUNGSRAM Részvénytársaság, Budapest | Process for preparing ammonium polymolybdate having a WO3 content of 0-0.2% |
| CN101792852A (en) * | 2009-11-17 | 2010-08-04 | 灵宝市金源矿业有限责任公司 | Processing for recovering low-grade molybdenum oxide concentrate through wet process |
| WO2016187993A1 (en) * | 2015-05-22 | 2016-12-01 | 北京赛科康仑环保科技有限公司 | Method for recovering and disposing waste scr denitrification catalyst |
| CN107298462A (en) * | 2017-07-03 | 2017-10-27 | 信丰华锐钨钼新材料有限公司 | A kind of method of the high purity molybdate from rough sodium molybdate solution |
| CN111826534A (en) * | 2020-07-16 | 2020-10-27 | 江西铜业股份有限公司 | Method for recovering molybdenum from low-molybdenum ammonia leaching residue |
| CN112174209A (en) * | 2020-09-17 | 2021-01-05 | 成都鼎泰新材料有限责任公司 | Green molybdenum smelting ion exchange process |
| CN112744864A (en) * | 2020-12-30 | 2021-05-04 | 成都虹波钼业有限责任公司 | Production process of 5N-grade high-purity molybdenum trioxide |
-
2022
- 2022-05-07 CN CN202210493266.9A patent/CN115072781A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3899284A (en) * | 1973-04-19 | 1975-08-12 | Noranda Mines Ltd | Form of ammonium tetramolybdate and method of preparation |
| DE3445726A1 (en) * | 1984-05-15 | 1985-11-21 | TUNGSRAM Részvénytársaság, Budapest | Process for preparing ammonium polymolybdate having a WO3 content of 0-0.2% |
| CN101792852A (en) * | 2009-11-17 | 2010-08-04 | 灵宝市金源矿业有限责任公司 | Processing for recovering low-grade molybdenum oxide concentrate through wet process |
| WO2016187993A1 (en) * | 2015-05-22 | 2016-12-01 | 北京赛科康仑环保科技有限公司 | Method for recovering and disposing waste scr denitrification catalyst |
| CN107298462A (en) * | 2017-07-03 | 2017-10-27 | 信丰华锐钨钼新材料有限公司 | A kind of method of the high purity molybdate from rough sodium molybdate solution |
| CN111826534A (en) * | 2020-07-16 | 2020-10-27 | 江西铜业股份有限公司 | Method for recovering molybdenum from low-molybdenum ammonia leaching residue |
| CN112174209A (en) * | 2020-09-17 | 2021-01-05 | 成都鼎泰新材料有限责任公司 | Green molybdenum smelting ion exchange process |
| CN112744864A (en) * | 2020-12-30 | 2021-05-04 | 成都虹波钼业有限责任公司 | Production process of 5N-grade high-purity molybdenum trioxide |
Non-Patent Citations (1)
| Title |
|---|
| 邓涛等: "用非晶态钼矿石制备钼酸铵的研究", 《无机盐工业》, no. 04, pages 119 - 120 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109019691B (en) | Preparation process of ammonium paratungstate | |
| CN109881012B (en) | Treatment method for recycling tungsten from tungsten metallurgy dephosphorization residues | |
| CN106916950B (en) | A method of producing low chromium ammonium poly-vanadate | |
| US6733564B1 (en) | Process for recovery of nickel from spent catalyst | |
| CN109385531B (en) | Resource utilization method of vanadium extraction tailings of aluminum-based vanadium-containing waste catalyst | |
| CN114572948A (en) | Method for reducing content of impurity metals in ammonium phosphate as raw material for ferric phosphate production | |
| CN108796612B (en) | Method for preparing calcium sulfate whisker and co-producing ammonium sulfate by phosphogypsum cyclic decomposition | |
| CN1386710A (en) | Process for preparing superfine iron oxide | |
| CN112624074B (en) | Method for producing industrial grade monoammonium phosphate, monopotassium phosphate and fertilizer grade monoammonium phosphate from raffinate | |
| CN115072781A (en) | Ammonium tetramolybdate and preparation process thereof | |
| CN105000539A (en) | Method for producing potassium dihydrogen phosphate and potassium-ammonium dihydrogen phosphate through wet process phosphoric acid | |
| CN1041619C (en) | Process for producing potassium sulfate by plaster stone conversion method | |
| CN109096154A (en) | A kind of H acid production process | |
| CN108129290A (en) | A kind of method of sulfate radical in removal lactic acid | |
| CN114349050B (en) | Method for preparing high-purity molybdic acid from calcium molybdate | |
| CN113979456A (en) | Method for preparing magnesium ammonium sulfate and sulfur-based ammonium phosphate by using industrial monoammonium phosphate slag | |
| CN109336151B (en) | Method for preparing aluminum chloride by using fly ash | |
| CN107021517A (en) | The production method of high pure electronic grade strontium nitrate | |
| US1701265A (en) | Recovery of ammonia from dilute solution | |
| AU2002242946A1 (en) | Process for the recovery of nickel from spent catalyst | |
| CN104628033A (en) | Method for preparing metavanadate | |
| US1892341A (en) | Manufacture of potassium salts from potassium chloride | |
| CN118515250B (en) | Method for producing battery grade lithium dihydrogen phosphate by utilizing lithium sulfate and battery grade lithium dihydrogen phosphate | |
| CN216572998U (en) | Production equipment for producing high-purity sodium thiocyanate by using low-content ammonium thiocyanate | |
| CN115490541B (en) | Method for continuously producing ammonium potassium phosphate |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220920 |
|
| RJ01 | Rejection of invention patent application after publication |