GB795424A - Improvements in or relating to sodium cyanide - Google Patents
Improvements in or relating to sodium cyanideInfo
- Publication number
- GB795424A GB795424A GB2230656A GB2230656A GB795424A GB 795424 A GB795424 A GB 795424A GB 2230656 A GB2230656 A GB 2230656A GB 2230656 A GB2230656 A GB 2230656A GB 795424 A GB795424 A GB 795424A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cyanide
- sodium
- sodium cyanide
- sodium hydroxide
- evaporator
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/08—Simple or complex cyanides of metals
- C01C3/10—Simple alkali metal cyanides
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Crystalline sodium cyanide is obtained by the evaporation of an aqueous solution of sodium cyanide below atmospheric pressure, while maintaining in the solution between 0.2 per cent and 3 per cent of sodium hydroxide to prevent the liberation of free hydrogen cyanide. The temperature employed is preferably between 56 DEG C. and 70 DEG C. A cyclic process is described, in which the sodium cyanide is obtained by neutralizing sodium hydroxide solution with hydrogen cyanide. After partial evaporation the sodium cyanide crystals are filtered off and the filtrate is returned partly to the evaporator and partly to the neutralization step so that the concentration of the sodium hydroxide in the evaporator is kept within the permissible limits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2230656A GB795424A (en) | 1956-07-18 | 1956-07-18 | Improvements in or relating to sodium cyanide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2230656A GB795424A (en) | 1956-07-18 | 1956-07-18 | Improvements in or relating to sodium cyanide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB795424A true GB795424A (en) | 1958-05-21 |
Family
ID=10177253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2230656A Expired GB795424A (en) | 1956-07-18 | 1956-07-18 | Improvements in or relating to sodium cyanide |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB795424A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8894961B2 (en) | 2009-05-22 | 2014-11-25 | E I Du Pont De Nemours And Company | Sodium cyanide process |
| CN107750234A (en) * | 2015-06-18 | 2018-03-02 | Epc工程与技术有限公司 | The method for preparing Cymag |
-
1956
- 1956-07-18 GB GB2230656A patent/GB795424A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8894961B2 (en) | 2009-05-22 | 2014-11-25 | E I Du Pont De Nemours And Company | Sodium cyanide process |
| CN107750234A (en) * | 2015-06-18 | 2018-03-02 | Epc工程与技术有限公司 | The method for preparing Cymag |
| CN107750234B (en) * | 2015-06-18 | 2021-12-24 | 赛普有限公司 | Process for the preparation of sodium cyanide |
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