CN1026226C - Preparation method of cuprous cyanide - Google Patents
Preparation method of cuprous cyanide Download PDFInfo
- Publication number
- CN1026226C CN1026226C CN 92105092 CN92105092A CN1026226C CN 1026226 C CN1026226 C CN 1026226C CN 92105092 CN92105092 CN 92105092 CN 92105092 A CN92105092 A CN 92105092A CN 1026226 C CN1026226 C CN 1026226C
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- China
- Prior art keywords
- sodium
- cuprous
- cyanide
- chlor
- cuprous cyanide
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Abstract
The present invention relates to a preparation technology for cuprous cyanide. Metallic copper, crystal copper sulphate and sodium chloride are mixed with water with the right amount, reaction is carried out for 3 to 4 hours at the temperature of 80 to 120 DGE C, univalent copper salts, namely complex solution generated by cuprous chloride and sodium chloride, are prepared, cuprous cyanide precipitates are generated through the reaction of cuprous chloride and sodium cyanide at room temperature, acid washing and water washing are carried out, and purified white monoclinic form cuprous cyanide can be obtained by dryness at the temperature of 110 DGE C. The present invention has the advantages of simple device, short technological flow, easy control, low cost and high quality of products, and is suitable for large-scale industrialization production.
Description
Cuprous cyanide is a kind of important chemical material.At present the traditional method of domestic production cuprous cyanide is to be the main raw material preparation with copper sulfate, S-WAT and sodium cyanide.Foreign patent RU62089, RO67960 have also reported the preparation method of cuprous cyanide, and main raw material is S-WAT, yellow soda ash, copper sulfate and sodium cyanide.Above-mentioned method technical process is long, and the reference mark is many in the actual production, the cost height, and the cuprous cyanide quality product of particularly producing is low and outward appearance is relatively poor.
The purpose of this invention is to provide a kind of technology of new generation cuprous cyanide, prepare the quality height, the cuprous cyanide product that outward appearance is good, and operation is few, and equipment is simple, and is with low cost.
The present invention is mainly by two step synthesis techniques.At first select metallic copper for use, cupric sulfate crystals and sodium-chlor reaction generate cuprous salt, promptly generate the complex solution of cuprous chloride and sodium-chlor, and this complex solution generates cuprous cyanide with the sodium cyanide reaction again.
The present invention selects metallic copper, cupric sulfate crystals and the sodium-chlor of technical grade for use, their weight ratio that feeds intake is 1-1.3: 1-1.3: 2-2.3, adding 10 times of water to the crystalline sulfuric acid weight of copper dissolves copper sulfate and sodium-chlor, heat 80-120 ℃, reacted 3-4 hour, the complex solution that obtains at room temperature reacts with sodium cyanide solution, generate the cuprous cyanide crystalline precipitation, through pickling (dilute hydrochloric acid of pH=2 or dilute sulphuric acid), be washed to neutrality, after the solid-liquid separation under 110 ℃ of temperature drying crystalline, promptly get purified cuprous cyanide.
The present invention is the complex solution and the reaction of sodium cyanide solution that degree Beaume is 10-20Be ' of the cuprous salt of 25-30Be ' with degree Beaume, the cuprous cyanide precipitation that generates is through a pickling (dilute hydrochloric acid of pH=2 or dilute sulphuric acid), wash four times to neutral, drying can obtain to contain the white monoclinic crystal powder of cuprous cyanide more than 99%.
The resulting product of the present invention identifies that by analysis every index all reaches ministerial standard.
Table 1 be product of the present invention with the mass ratio of produced in conventional processes cuprous cyanide.
Production process of the present invention is few, and equipment is simple, and the reference mark is few in the actual production operation, and raw material is easy to get, and is with low cost, and the quality product height is applicable to large-scale industrial production.
Substantial characteristics that the present invention gives prominence to and exploitativeness can be embodied from following embodiment.
Example 1:
In 3000 milliliters beaker, add 1800 ml waters, add 330 gram sodium-chlor again, 100 gram red copper bits and 170 grams contain the copper sulfate of five crystal water, heating, reaction is 4 hours under 110-120 ℃ of temperature, the complex solution (degree Beaume is 25Be ') that the cuprous chloride that obtains and sodium-chlor are generated is that the sodium cyanide solution of 10Be ' (20%) carries out replacement(metathesis)reaction to reacting completely with degree Beaume at room temperature, stir, the cuprous cyanide precipitation that generates is washed once with the dilute sulfuric acid aqueous solution of pH=2, wash four times then with water to neutral, solid-liquid separation, drying crystalline under 110 ℃ of temperature gets cuprous cyanide finished product 100 grams.
Example 2:
The water that in the enamel still of 2,000 liters, adds 1.7 tons, add 0.33 ton of sodium cyanide, add 0.14 ton of red copper bits and 0.17 ton of cupric sulfate crystals again, steam heating, reaction is 3 hours under 110-120 ℃ of temperature, the complex compound (degree Beaume is 30Be ') that the cuprous chloride that obtains and sodium-chlor are generated is transferred in the enamel still of another 2,000 liter then, at room temperature drip the sodium cyanide solution that degree Beaume is 12Be ', be stirred to and react completely, the white precipitate that generates is washed once with the dilute sulfuric acid aqueous solution of pH=2, washed four times again to neutral, solid-liquid separation, dry under 110 ℃ of temperature, get 1 ton of cuprous cyanide product.
Table 1:
Yang Zhuan Shanghai, Tianjin Tao Pu
Test event the present invention
Chemical plant, sub-chemical plant
CuCN（%，≥） 99.05 98 98.5
CN
-（%，≥） 28.72 28.4 28.5
Fe（%，≤） 0.005 0.03 0.01
Cl
-（%，≤） 0.01 0.05 0.05
Na
2CO
3（%，≤） 0.08 0.4 0.4
The pure white greyish white Huang of outward appearance is greyish white
Claims (2)
1, a kind of is the method that main raw material prepares cuprous cyanide with copper sulfate and sodium cyanide, it is characterized in that metallic copper, cupric sulfate crystals and the sodium-chlor of technical grade are put together, adding weight is to decuple the water of cupric sulfate crystals with cupric sulfate crystals and sodium-chlor dissolving, heat 80-120 ℃, reacted 3-hour, the complex solution that cuprous chloride that makes and sodium-chlor generate at room temperature generates the cuprous chloride precipitation with the sodium chloride aqueous solution reaction, to precipitate pickling, be washed to neutrality, solid-liquid separation, drying crystalline under 110 ℃ of temperature promptly gets the cuprous cyanide product; The weight ratio of metallic copper, cupric sulfate crystals and sodium-chlor is 1-1.3: 1-1.3: 2-2.3; The complex solution that cuprous chloride and sodium-chlor generate is 5-6: 2-4 with the ratio of the degree Beaume of sodium cyanide solution.
2,, it is characterized in that said pickling is to use diluted hydrochloric acid aqueous solution or the dilute sulfuric acid aqueous solution of pH=2 according to the said method for preparing cuprous cyanide of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105092 CN1026226C (en) | 1992-06-27 | 1992-06-27 | Preparation method of cuprous cyanide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105092 CN1026226C (en) | 1992-06-27 | 1992-06-27 | Preparation method of cuprous cyanide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1066636A CN1066636A (en) | 1992-12-02 |
| CN1026226C true CN1026226C (en) | 1994-10-19 |
Family
ID=4941176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92105092 Expired - Fee Related CN1026226C (en) | 1992-06-27 | 1992-06-27 | Preparation method of cuprous cyanide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1026226C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211088A (en) * | 2014-09-10 | 2014-12-17 | 杭州青化社化工有限公司 | Preparation method of cuprous cyanide |
| CN107758694A (en) * | 2017-09-30 | 2018-03-06 | 杭州青化社化工有限公司 | A kind of high-purity cuprous cyanide environment-friendly type preparation method |
| CN107758693A (en) * | 2017-09-30 | 2018-03-06 | 杭州青化社化工有限公司 | A kind of method that cuprous cyanide is prepared using high cyanide containing wastewater |
| CN111392747A (en) * | 2020-03-24 | 2020-07-10 | 宁波神化特种化学品集成有限公司 | Preparation method of cuprous cyanide |
| CN111392944A (en) * | 2020-03-24 | 2020-07-10 | 宁波神化特种化学品集成有限公司 | Treatment method of cuprous cyanide production wastewater |
-
1992
- 1992-06-27 CN CN 92105092 patent/CN1026226C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1066636A (en) | 1992-12-02 |
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