GB359559A - Improvements in the manufacture and production of alkali metal cyanates - Google Patents
Improvements in the manufacture and production of alkali metal cyanatesInfo
- Publication number
- GB359559A GB359559A GB2248130A GB2248130A GB359559A GB 359559 A GB359559 A GB 359559A GB 2248130 A GB2248130 A GB 2248130A GB 2248130 A GB2248130 A GB 2248130A GB 359559 A GB359559 A GB 359559A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonia
- reaction
- alkali metal
- carbon dioxide
- water
- 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
- C01C3/14—Cyanic or isocyanic 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 cyanates are obtained by heating alkali metal carbonates with ammonia and carbon dioxide or a compound resulting from the combination of ammonia and carbon dioxide without the splitting off of water, such as ammonium carbamate or carbonate, under conditions in which urea is capable of being formed. Preferably the reaction is carried out under a pressure of at least 50 atmospheres at temperatures up to 400 DEG C. The crude or purified cyanate may be heated to temperatures above 400 DEG C., for example 900 DEG C., with reducing gases such as hydrogen or may be treated as described in Specification 307,778, [Class 1 (ii), Inorganic compounds, other than &c.], to produce cyanides. The water set free during the cyanate producing reaction may be removed from the pressure vessel by allowing a part of the vapours to escape during the reaction and replacing them by fresh ammonia and carbon dioxide. At the end of the reaction water and unconverted ammonium carbonate are removed by heating under normal or reduced pressure. The ammonia may be introduced in the liquid form. Examples are given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2248130A GB359559A (en) | 1930-07-25 | 1930-07-25 | Improvements in the manufacture and production of alkali metal cyanates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2248130A GB359559A (en) | 1930-07-25 | 1930-07-25 | Improvements in the manufacture and production of alkali metal cyanates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB359559A true GB359559A (en) | 1931-10-26 |
Family
ID=10180087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2248130A Expired GB359559A (en) | 1930-07-25 | 1930-07-25 | Improvements in the manufacture and production of alkali metal cyanates |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB359559A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2690957A (en) * | 1950-11-21 | 1954-10-05 | Olin Mathieson | Process for making alkali metal cyanates or alkali metal thiocyanates |
| US2690956A (en) * | 1950-11-21 | 1954-10-05 | Olin Mathieson | Process of making sodium cyanate |
| US2699418A (en) * | 1950-12-01 | 1955-01-11 | Olin Mathieson | Process of applying lithium cyanate to mites |
| US2766100A (en) * | 1952-06-06 | 1956-10-09 | Olin Mathieson | Method for separating sodium cyanate from sodium cyanate-sodium carbonate mixture |
| CN116813353A (en) * | 2023-05-30 | 2023-09-29 | 安徽工业大学 | Silicon nitride-based composite powder and preparation method and sintering method thereof |
-
1930
- 1930-07-25 GB GB2248130A patent/GB359559A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2690957A (en) * | 1950-11-21 | 1954-10-05 | Olin Mathieson | Process for making alkali metal cyanates or alkali metal thiocyanates |
| US2690956A (en) * | 1950-11-21 | 1954-10-05 | Olin Mathieson | Process of making sodium cyanate |
| US2699418A (en) * | 1950-12-01 | 1955-01-11 | Olin Mathieson | Process of applying lithium cyanate to mites |
| US2766100A (en) * | 1952-06-06 | 1956-10-09 | Olin Mathieson | Method for separating sodium cyanate from sodium cyanate-sodium carbonate mixture |
| CN116813353A (en) * | 2023-05-30 | 2023-09-29 | 安徽工业大学 | Silicon nitride-based composite powder and preparation method and sintering method thereof |
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