GB481142A - Improvements in or relating to the preparation of an alkali cyanide - Google Patents
Improvements in or relating to the preparation of an alkali cyanideInfo
- Publication number
- GB481142A GB481142A GB5430/37A GB543037A GB481142A GB 481142 A GB481142 A GB 481142A GB 5430/37 A GB5430/37 A GB 5430/37A GB 543037 A GB543037 A GB 543037A GB 481142 A GB481142 A GB 481142A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- water
- liquid
- cyanide
- solution
- 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
Alkali metal, e.g. sodium, cyanides are prepared in a solid form by a cyclic process in which hydrocyanic acid is neutralized with a concentrated aqueous solution of an alkali metal hydroxide, a water-miscible liquid in which alkali metal cyanide is substantially insoluble is added to the neutralized solution in an amount sufficient to precipitate the alkali metal cyanide, the precipitated alkali metal cyanide is separated from the resulting aqueous liquid, solid alkali metal hydroxide is added to the aqueous liquid in an amount sufficient to cause some dehydration of the water-miscible liquid and a separation into two phases, one being a solution of alkali metal hydroxide which is neutralized with additional quantities of hydrocyanic acid and the other being the partially dehydrated water-miscible liquid which is used to precipitate out the thus formed alkali metal cyanide. The water-miscible liquid may be ethyl, isopropyl or tertiary butyl alcohol. The hydrocyanic acid may be employed in the liquid or gaseous form. The precipitation of the alkali metal cyanide may be effected at 40 DEG C. The accumulation of water in the system may be prevented by removing a portion of the solution or by evaporation. The solid cyanide may be dried and briquetted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US481142XA | 1936-03-10 | 1936-03-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB481142A true GB481142A (en) | 1938-03-07 |
Family
ID=21952814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5430/37A Expired GB481142A (en) | 1936-03-10 | 1937-02-23 | Improvements in or relating to the preparation of an alkali cyanide |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB481142A (en) |
| NL (1) | NL48780C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107750234A (en) * | 2015-06-18 | 2018-03-02 | Epc工程与技术有限公司 | The method for preparing Cymag |
-
0
- NL NL48780D patent/NL48780C/xx active
-
1937
- 1937-02-23 GB GB5430/37A patent/GB481142A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| NL48780C (en) |
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