CN1240762A - Process for preparing copper arsenate - Google Patents
Process for preparing copper arsenate Download PDFInfo
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- CN1240762A CN1240762A CN 99115480 CN99115480A CN1240762A CN 1240762 A CN1240762 A CN 1240762A CN 99115480 CN99115480 CN 99115480 CN 99115480 A CN99115480 A CN 99115480A CN 1240762 A CN1240762 A CN 1240762A
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Abstract
A process for preparing copper arsenate includes feeding water to reactor, steam heating, feeding As2O3 to the reactor, stirring, feeding nitric acid or iodine as catalyst and oxidant to obtain As2O5, reaction of As2O5 with the solution of alkali-metal hydroxide and copper sulfate, filtering, drying and baking. Its advantages are simple equipment and process, low environmental pollution, high utilization rate of raw materials, low cost and high quality of product. Obtained copper arsenate can be directly used to control termite and for preventing wood from being eroded.
Description
The production method of the present invention's step and a kind of cupric arsenate.
The compound of arsenic and arsenic generally all is deleterious, but simultaneously they also are important industrial raw material, how to turn waste into wealth, and what use is made of arsenic and compound thereof are the problems of research both at home and abroad always, especially to some smelteries that need recycle arsenic.Use the arsenical copper chelating agent at present in the world, carry out termite control and wood preservation.By the cupric arsenate product that white arsenic is produced, can directly be used for control termites and wood preservation, the wide industrial purposes is arranged.In the treating processes of arsenic, there is not to find relevant method of producing cupric arsenate by white arsenic at present.
The purpose of this invention is to provide a kind of method of producing cupric arsenate by white arsenic.
Production method of the present invention is as follows:
1. the oxidation of white arsenic
In the recovery of arsenic, what generally obtain earlier is white arsenic, must carry out oxide treatment to white arsenic earlier.In reactor, add entry, start agitator, feed steam heating, sizing mixing in the white arsenic adding reactor, the weight ratio of water and white arsenic is 1: 1～1: 1.2, adds nitric acid or the iodine that weight percent is 1-2% again and makes catalyzer, adds a kind of as oxygenant in nitric acid, hydrogen peroxide, air, the oxygen then, temperature is remained on 50～60 ℃, and oxidization time is 2-3 hour.
2. synthesis procedure
The arsenic powder that generates is injected in the reactor, start agitator, the feeding steam heating heats up, and injects the alkali metal hydrogen oxidizing solution then, as sodium hydroxide or potassium hydroxide, its concentration is the 5-7 grams per liter, add the 15-25% that weight is arsenic powder again, concentration is the copper sulfate of 400～450 grams per liters, and temperature of reaction is 85～95 ℃, generated time is 2-4 hour, and pH value is controlled at 11-13.
3. solid-liquid separation process
After building-up reactions finishes, open the reactor bottom and close door, mixture is put into the vacuum filtration tank, open water ring vacuum pump, carry out solid-liquid separation, a reaction slag part that is generated can be returned use, a part is handled, and closes vacuum pump, sheds the solid materials product.
4. stoving process
Hydrate is carried out drying and packaging, and bake out temperature is controlled at 20-60 ℃.
Utilize present method to produce cupric arsenate, equipment is simple, and technical process is short, and environmental pollution is little, raw material availability height, every index request of quality product accord with Q/TKEH001-93 standard.
Embodiment
In reactor, add entry, start agitator, feed steam heating, sizing mixing in the white arsenic adding reactor, the weight ratio of water and white arsenic is 1: 1, adds total weight percent again and is 1% nitric acid or iodine and make catalyzer, slowly adds a kind of as oxygenant in nitric acid, hydrogen peroxide, air, the oxygen then, temperature is remained on 50～60 ℃, oxidation 2-3 hour.
The arsenic powder that generates is injected in the reactor, start agitator, the feeding steam heating heats up, inject alkali metal hydrogen oxidizing solution sodium hydroxide then, concentration is the 5-7 grams per liter, and adding weight more slowly is 20% of arsenic powder, concentration is the copper sulfate of 400 grams per liters, temperature of reaction is 85～95 ℃, Synthetic 2-4 hour, and pH value is controlled at 11-13.
After building-up reactions finishes, open the reactor bottom and close door, mixture is put into the vacuum filtration tank, open water ring vacuum pump, carry out solid-liquid separation, a reaction slag part that is generated can be returned use, a part is handled, and closes vacuum pump, sheds the solid materials product.
Hydrate is carried out drying and packaging, and bake out temperature is controlled at 25-30 ℃.
So just can obtain the cupric arsenate product of quality accord with Q/TKEH001-93 standard.
Claims (3)
1. the production method of a cupric arsenate may further comprise the steps:
1. the oxidation of white arsenic
In reactor, add entry, start agitator, feed steam heating, sizing mixing in the white arsenic adding reactor, the weight ratio of water and white arsenic is 1: 1～1: 1.2, adds nitric acid or the iodine that weight percent is 1-2% again and makes catalyzer, adds oxygenant, temperature is remained on 50～60 ℃, oxidation 2-3 hour;
2. synthesis procedure
The arsenic powder that generates is injected in the reactor, start agitator, the feeding steam heating heats up, implantation concentration is the alkali metal hydrogen oxidizing solution of 5-7 grams per liter, add the 15-25% that weight is arsenic powder again, concentration is the copper sulfate of 400～450 grams per liters, and temperature of reaction is 85～95 ℃, generated time is 2-4 hour, and pH value is controlled at 11-13;
3. solid-liquid separation process
Building-up reactions is opened reactor bottom and is closed door after finishing, and mixture is put into the vacuum filtration tank, opens water ring vacuum pump, carries out solid-liquid separation, closes vacuum pump, draws off the solid materials product;
4. stoving process
Water-containing product is carried out drying and packaging, and bake out temperature is controlled at 20-60 ℃.
2. production method according to claim 1 is characterized in that: described oxygenant is nitric acid, hydrogen peroxide, air or oxygen.
3. production method according to claim 1 is characterized in that: described alkali metal hydrogen oxidizing solution is as sodium hydroxide or potassium hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99115480 CN1240762A (en) | 1999-07-16 | 1999-07-16 | Process for preparing copper arsenate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99115480 CN1240762A (en) | 1999-07-16 | 1999-07-16 | Process for preparing copper arsenate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1240762A true CN1240762A (en) | 2000-01-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99115480 Pending CN1240762A (en) | 1999-07-16 | 1999-07-16 | Process for preparing copper arsenate |
Country Status (1)
| Country | Link |
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| CN (1) | CN1240762A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267720A (en) * | 2010-06-07 | 2011-12-07 | 云南锡业集团（控股）有限责任公司 | Method for synthesizing arsenic acid under oxygen tension |
| CN102534235A (en) * | 2012-02-13 | 2012-07-04 | 株洲冶炼集团股份有限公司 | Method for recovering valued metals from cobalt-nickel residue obtained through antimony trioxide purification in zinc hydrometallurgy |
| CN113957251A (en) * | 2021-09-26 | 2022-01-21 | 济源豫光有色冶金设计研究院有限公司 | Method for harmlessly treating copper soot and recycling various metals by using waste lead storage battery acid |
-
1999
- 1999-07-16 CN CN 99115480 patent/CN1240762A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267720A (en) * | 2010-06-07 | 2011-12-07 | 云南锡业集团（控股）有限责任公司 | Method for synthesizing arsenic acid under oxygen tension |
| CN102534235A (en) * | 2012-02-13 | 2012-07-04 | 株洲冶炼集团股份有限公司 | Method for recovering valued metals from cobalt-nickel residue obtained through antimony trioxide purification in zinc hydrometallurgy |
| CN102534235B (en) * | 2012-02-13 | 2013-08-07 | 株洲冶炼集团股份有限公司 | Method for recovering valued metals from cobalt-nickel residue obtained through antimony trioxide purification in zinc hydrometallurgy |
| CN113957251A (en) * | 2021-09-26 | 2022-01-21 | 济源豫光有色冶金设计研究院有限公司 | Method for harmlessly treating copper soot and recycling various metals by using waste lead storage battery acid |
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