CN107758693A - A kind of method that cuprous cyanide is prepared using high cyanide containing wastewater - Google Patents
A kind of method that cuprous cyanide is prepared using high cyanide containing wastewater Download PDFInfo
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- CN107758693A CN107758693A CN201710937665.9A CN201710937665A CN107758693A CN 107758693 A CN107758693 A CN 107758693A CN 201710937665 A CN201710937665 A CN 201710937665A CN 107758693 A CN107758693 A CN 107758693A
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- cyanide
- prepared
- containing wastewater
- cuprous cyanide
- cuprous
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/08—Simple or complex cyanides of metals
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- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a kind of method that cuprous cyanide is prepared using high cyanide containing wastewater, preparation process are as follows：Prepare Cu+；CuCN synthetic reactions；Adjust PH；Soaked, washed, filtered, be dehydrated with the concentrated sulfuric acid.The present invention uses and prepares Cu+ by reducing process first, it is added in high cyanide containing wastewater and forms cuprous cyanide precipitation, then adjust pH value filtrate cyanogen content by inorganic acid constantly to reduce, eventually passes through a series of chemical process, cuprous cyanide purity improves constantly, and purity is up to 98.92%.
Description
Technical field
The invention belongs to cuprous cyanide preparation field, more particularly to one kind to prepare cuprous cyanide using high cyanide containing wastewater
Method.
Background technology
At present to high cyanide containing wastewater, typically carry out removing cyanogen wastewater treatment using chlor-alkali or ferrous sulfate method, but
Not only be these methods without the cyanogen root in effective recycling waste water, and introduce and largely remove cyanogen medicine, introduce new
Pollution, processing cost are high.
The content of the invention
The technical problems to be solved by the invention are to provide the utilization high concentration that a kind of technique is simple, organic efficiency is high and contain cyanogen
The method that waste water prepares cuprous cyanide.
In order to solve the above technical problems, the present invention provides a kind of side that cuprous cyanide is prepared using high cyanide containing wastewater
Method, preparation process are as follows：
（1）Cu+ is prepared with sulphite reduction copper-bath；
（2）A certain amount of cyanide wastewater (determining its cyanogen content, copper content, and copper sulphate dosage needed for calculating) is taken to add by sulfuric acid
In prepared by copper solution reduces Cu+ solution, stirring carries out CuCN synthetic reactions.
（3）Waste liquid is continuously added in solution, and pH value constantly rises, and pH value is in alkalescence after reaction, so with waste liquid
Adding the pH value of solution can constantly rise, and now precipitation is hard, tight, be unfavorable for slurries in production and pump out, and amount containing cyanogen is higher in filtrate,
Product only content is relatively low,
（4）As being adjusted to acidity with sulfuric acid in the reaction, solution releases a large amount of bubbles, and carbonate decomposition, products obtained therefrom is loose, CuCN
Content is up to 88%-92% or so.Filtrate amount containing cyanogen substantially reduces,
（5）Product is further soaked with the concentrated sulfuric acid, washed, filtered, is dehydrated, cuprous cyanide purity more than 98%.
Further, step（1）The sulphite includes sodium sulfite, potassium sulfite.
Further, step（2）Reaction time is 0.5-1.5h.
Further, step（3）PH value is 9-13.
Further, step（3）Product content is 60-75%.
Further, step（5）Dewatering type is the physics dewatering such as concentration, centrifugation, dry.
The present invention is added to formation cuprous cyanide in high cyanide containing wastewater and sunk using Cu+ is prepared by reducing process first
Form sediment, then adjust pH value filtrate cyanogen content by inorganic acid constantly to reduce, eventually pass through a series of chemical process, cyaniding is sub-
Copper purity improves constantly.
Embodiment
The present invention is described in further details below in conjunction with embodiment.
Embodiment 1：
A kind of method that cuprous cyanide is prepared using high cyanide containing wastewater,
The high cyanide containing wastewater sample mainly contains CN-, [Cu (CN) 3] 2-, [Fe (CN) 6] 2-,
Preparation process is as follows：
（1）Cu+ is prepared with sulphite reduction copper-bath, its reaction equation is as follows：
2Cu2+ + SO32- + 2OH- = 2Cu+ + 4SO2- + H2O
（2）A certain amount of cyanide wastewater (determining its cyanogen content, copper content, and copper sulphate dosage needed for calculating) is taken to add by sulfuric acid
In prepared by copper solution reduces Cu+ solution, stirring carries out CuCN synthetic reactions, reaction time 1.5h, while obtains micro
Cu2（Fe(CN)6）Precipitation.
（3）Waste liquid is continuously added in solution, and pH value constantly rises, and pH value is in alkalescence after reaction, so with waste liquid
Adding the pH value of solution can constantly rise, and pH value is 10 after reaction, and now precipitation is hard, tight, be unfavorable for slurries in production and pump out, filter
Amount containing cyanogen is higher in liquid, and product is 75% only containing CuCN,
（4）As being adjusted to acidity with sulfuric acid in the reaction, solution releases a large amount of bubbles, and carbonate decomposition, products obtained therefrom is loose, CuCN
Content is up to 92% or so.Filtrate amount containing cyanogen substantially reduces,
（5）Product is further soaked with the concentrated sulfuric acid, washed, filtered, is dehydrated, cuprous cyanide purity 98.92%.
Embodiment 2：
The high cyanide containing wastewater sample mainly contains CN-, [Cu (CN) 3] 2-, [Fe (CN) 6] 2-,
Preparation process is as follows：
（1）Cu+ is prepared with sulphite reduction copper-bath, its reaction equation is as follows：
2Cu2+ + SO32- + 2OH- = 2Cu+ + 4SO2- + H2O
（2）A certain amount of cyanide wastewater (determining its cyanogen content, copper content, and copper sulphate dosage needed for calculating) is taken to add by sulfuric acid
In prepared by copper solution reduces Cu+ solution, stirring carries out CuCN synthetic reactions, reaction time 0.5h, while obtains micro
Cu2（Fe(CN)6）Precipitation.
（3）Waste liquid is continuously added in solution, and pH value constantly rises, and pH value is in alkalescence after reaction, so with waste liquid
Adding the pH value of solution can constantly rise, and pH value is 12 after reaction, and now precipitation is hard, tight, be unfavorable for slurries in production and pump out, filter
Amount containing cyanogen is higher in liquid, and product is 60% only containing CuCN,
（4）As being adjusted to acidity with sulfuric acid in the reaction, solution releases a large amount of bubbles, and carbonate decomposition, products obtained therefrom is loose, CuCN
Content is up to 88% or so.Filtrate amount containing cyanogen substantially reduces,
（5）Product is further soaked with the concentrated sulfuric acid, washed, filtered, is dehydrated, cuprous cyanide purity more than 98.08%.
The present invention is added to formation cuprous cyanide in high cyanide containing wastewater and sunk using Cu+ is prepared by reducing process first
Form sediment, then adjust pH value filtrate cyanogen content by inorganic acid constantly to reduce, eventually pass through a series of chemical process, cyaniding is sub-
Copper purity improves constantly.
The foregoing is only the present invention better embodiment, protection scope of the present invention not using above-mentioned embodiment as
Limit, as long as equivalent modification that those of ordinary skill in the art are made according to disclosed content or change, should all include power
In protection domain described in sharp claim.
Claims (6)
- A kind of 1. method that cuprous cyanide is prepared using high cyanide containing wastewater, it is characterised in that preparation process is as follows：（1）Cu+ is prepared with sulphite reduction copper-bath；（2）A certain amount of cyanide wastewater (determining its cyanogen content, copper content, and copper sulphate dosage needed for calculating) is taken to add by sulfuric acid In prepared by copper solution reduces Cu+ solution, stirring carries out CuCN synthetic reactions；（3）Waste liquid is continuously added in solution, and pH value constantly rises, and pH value is in alkalescence after reaction；（4）Acidity is adjusted to sulfuric acid in the reaction, solution releases a large amount of bubbles, and carbonate decomposition, products obtained therefrom is loose, and CuCN contains Up to 88%-92% or so, filtrate amount containing cyanogen substantially reduces amount；（5）CuCN is further soaked with the concentrated sulfuric acid, washed, filtered, is dehydrated, cuprous cyanide purity more than 98%.
- A kind of 2. method that cuprous cyanide is prepared using high cyanide containing wastewater according to claim 1, it is characterised in that step Suddenly（1）The sulphite includes sodium sulfite, potassium sulfite.
- A kind of 3. method that cuprous cyanide is prepared using high cyanide containing wastewater according to claim 1, it is characterised in that step Suddenly（2）Reaction time is 0.5-1.5h.
- A kind of 4. method that cuprous cyanide is prepared using high cyanide containing wastewater according to claim 1, it is characterised in that step Suddenly（3）PH value is 9-13.
- A kind of 5. method that cuprous cyanide is prepared using high cyanide containing wastewater according to claim 1, it is characterised in that step Suddenly（3）Product content is 60-75%.
- A kind of 6. method that cuprous cyanide is prepared using high cyanide containing wastewater according to claim 1, it is characterised in that step Suddenly（5）Dewatering type is physics dewatering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710937665.9A CN107758693A (en) | 2017-09-30 | 2017-09-30 | A kind of method that cuprous cyanide is prepared using high cyanide containing wastewater |
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| CN201710937665.9A CN107758693A (en) | 2017-09-30 | 2017-09-30 | A kind of method that cuprous cyanide is prepared using high cyanide containing wastewater |
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| CN107758693A true CN107758693A (en) | 2018-03-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112358090A (en) * | 2020-11-18 | 2021-02-12 | 云南黄金矿业集团股份有限公司 | Harmless treatment method for gold smelting cyanide-and heavy metal-containing wastewater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066636A (en) * | 1992-06-27 | 1992-12-02 | 郑铁峰 | The preparation method of cuprous cyanide |
| CN101100328A (en) * | 2006-07-05 | 2008-01-09 | 山东双凤股份有限公司 | Comprehensive treatment method for cuprous cyanide technique waste water |
| CN104211088A (en) * | 2014-09-10 | 2014-12-17 | 杭州青化社化工有限公司 | Preparation method of cuprous cyanide |
-
2017
- 2017-09-30 CN CN201710937665.9A patent/CN107758693A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066636A (en) * | 1992-06-27 | 1992-12-02 | 郑铁峰 | The preparation method of cuprous cyanide |
| CN101100328A (en) * | 2006-07-05 | 2008-01-09 | 山东双凤股份有限公司 | Comprehensive treatment method for cuprous cyanide technique waste water |
| CN104211088A (en) * | 2014-09-10 | 2014-12-17 | 杭州青化社化工有限公司 | Preparation method of cuprous cyanide |
Non-Patent Citations (1)
| Title |
|---|
| 张小玲等: "制备氰化亚铜治理高浓度含氰废水", 《福建分析测试》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112358090A (en) * | 2020-11-18 | 2021-02-12 | 云南黄金矿业集团股份有限公司 | Harmless treatment method for gold smelting cyanide-and heavy metal-containing wastewater |
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Application publication date: 20180306 |