GB487606A - Improvements in the recovery of pure sodium cyanide - Google Patents
Improvements in the recovery of pure sodium cyanideInfo
- Publication number
- GB487606A GB487606A GB3533436A GB3533436A GB487606A GB 487606 A GB487606 A GB 487606A GB 3533436 A GB3533436 A GB 3533436A GB 3533436 A GB3533436 A GB 3533436A GB 487606 A GB487606 A GB 487606A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sodium cyanide
- ammonia
- solution
- removal
- anhydrous
- 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)
- Removal Of Specific Substances (AREA)
Abstract
Sodium cyanide is recovered from its ammoniacal aqueous solutions by removing the ammonia from the solution whereby sodium cyanide containing water of crystallization separates, and then recovering the solid sodium cyanide from the mother liquor. The ammonia may be expelled by passing an inert gas through the solution (e.g. carbon dioxide-free air) and/or by the application of reduced pressure. The temperature should not exceed 40 DEG C. during the removal. The cooling effect of the removal of the ammonia promotes the crystallization and this effect may be increased by the use of heat-insulating vessels. The NaCN.2H2O may be converted into the anhydrous salt, preferably by treatment with anhydrous or gaseous ammonia which produces a pulp consisting of the anhydrous salt and its saturated ammoniacal aqueous solution which can be separated from each other. The solution may be returned to the process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3533436A GB487606A (en) | 1936-12-24 | 1936-12-24 | Improvements in the recovery of pure sodium cyanide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3533436A GB487606A (en) | 1936-12-24 | 1936-12-24 | Improvements in the recovery of pure sodium cyanide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB487606A true GB487606A (en) | 1938-06-23 |
Family
ID=10376557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3533436A Expired GB487606A (en) | 1936-12-24 | 1936-12-24 | Improvements in the recovery of pure sodium cyanide |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB487606A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3241911A (en) * | 1962-07-13 | 1966-03-22 | Electro Chimie Metal | Process for producing sodium cyanide |
| US3323860A (en) * | 1962-08-02 | 1967-06-06 | Electro Chimie Metal | Anhydrous sodium cyanide and process for preparation of same |
-
1936
- 1936-12-24 GB GB3533436A patent/GB487606A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3241911A (en) * | 1962-07-13 | 1966-03-22 | Electro Chimie Metal | Process for producing sodium cyanide |
| US3323860A (en) * | 1962-08-02 | 1967-06-06 | Electro Chimie Metal | Anhydrous sodium cyanide and process for preparation of same |
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