GB739635A - Preparation of alkali metal thiocyanates - Google Patents
Preparation of alkali metal thiocyanatesInfo
- Publication number
- GB739635A GB739635A GB451554A GB451554A GB739635A GB 739635 A GB739635 A GB 739635A GB 451554 A GB451554 A GB 451554A GB 451554 A GB451554 A GB 451554A GB 739635 A GB739635 A GB 739635A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali metal
- sulphur
- thiocyanate
- boiling point
- thiocyanates
- 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
- C01C3/20—Thiocyanic acid; Salts thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Alkali metal thiocyanates are produced by reacting sulphur with alkali metal cyanide at 100-110 DEG C. in an aqueous solution of the alkali metal thiocyanate of such concentration as to have a boiling point of at least 110 DEG C. A 50 per cent solution of the thiocyanate containing a dispersing agent, e.g. sodium alkylated naphthalene sulphonate, is heated to 100-110 DEG C. and successive additions of cyanide and sulphur are made thereto, with stirring. The sulphur should always be in excess. Water should be added to maintain the original thiocyanate concentration. The resulting mixture may be diluted with water and filtered to remove excess sulphur. When anhydrous potassium or lithium thiocyanates are being prepared the filtered liquor is evaporated to a boiling point 135-145 DEG C. and cooled to room temperature to crystallize the salt. When anhydrous sodium thiocyanate is being prepared the filtered liquor is evaporated to a boiling point 140-150 DEG C. and cooled to above 30 DEG C., e.g. 50-60 DEG C. to crystallize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB451554A GB739635A (en) | 1954-02-16 | 1954-02-16 | Preparation of alkali metal thiocyanates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB451554A GB739635A (en) | 1954-02-16 | 1954-02-16 | Preparation of alkali metal thiocyanates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB739635A true GB739635A (en) | 1955-11-02 |
Family
ID=9778666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB451554A Expired GB739635A (en) | 1954-02-16 | 1954-02-16 | Preparation of alkali metal thiocyanates |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB739635A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3714331A (en) * | 1969-10-08 | 1973-01-30 | Degussa | Process for the production of alkali thiocyanates |
| US4626423A (en) * | 1985-04-20 | 1986-12-02 | Degussa Aktiengesellschaft | Process for the production of alkalithiocyanate |
-
1954
- 1954-02-16 GB GB451554A patent/GB739635A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3714331A (en) * | 1969-10-08 | 1973-01-30 | Degussa | Process for the production of alkali thiocyanates |
| US4626423A (en) * | 1985-04-20 | 1986-12-02 | Degussa Aktiengesellschaft | Process for the production of alkalithiocyanate |
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