GB1137292A - Method of preparing isocyanic acid and stabilizing the same - Google Patents
Method of preparing isocyanic acid and stabilizing the sameInfo
- Publication number
- GB1137292A GB1137292A GB52466A GB52466A GB1137292A GB 1137292 A GB1137292 A GB 1137292A GB 52466 A GB52466 A GB 52466A GB 52466 A GB52466 A GB 52466A GB 1137292 A GB1137292 A GB 1137292A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isocyanic acid
- carbamoyl chloride
- jan
- sufficient
- lewis base
- 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
1,137,292. Isocyanic acid. STAUFFER CHEMICAL CO. 5 Jan., 1966 [18 Jan, 1965], No. 524/66. Heading C1A. Stabilized isocyanic acid is produced by contacting carbamoyl chloride with a Lewis base, the basicity of which is sufficient to abstract hydrogen chloride from the carbamoyl chloride, but not sufficient to cause trimerization of the so-formed isocyanic acid. The weak Lewis base may be an ether (e.g. diethylether), a polyether (e.g. a dialkoxyalkane such as 1,2-dimethyoxethane), a polymeric ether (e.g. a polyoxyethylene resin), a thioether (e.g. as a dialkylsulphide such as diemthyl-sulphide, diethylsulphide or di-n-propyl sulphide) and substituted amides (e.g. an N,N-dialkyl amide such as N,N-dimethylacetamide). The carbamoyl chloride may be generated just before use by reacting phosgene with ammonia in a heated reaction zone and collecting the carbamoyl chloride in a water cooled receiver.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US42628565A | 1965-01-18 | 1965-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1137292A true GB1137292A (en) | 1968-12-18 |
Family
ID=23690148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB52466A Expired GB1137292A (en) | 1965-01-18 | 1966-01-05 | Method of preparing isocyanic acid and stabilizing the same |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE675130A (en) |
| DE (1) | DE1245343B (en) |
| FR (1) | FR1463667A (en) |
| GB (1) | GB1137292A (en) |
| IL (1) | IL24876A (en) |
| NL (1) | NL144239B (en) |
| SE (1) | SE317656B (en) |
-
1965
- 1965-12-27 IL IL2487665A patent/IL24876A/en unknown
-
1966
- 1966-01-05 GB GB52466A patent/GB1137292A/en not_active Expired
- 1966-01-12 DE DEST24853A patent/DE1245343B/en active Pending
- 1966-01-14 BE BE675130D patent/BE675130A/xx not_active Expired
- 1966-01-17 SE SE58466A patent/SE317656B/xx unknown
- 1966-01-17 FR FR46084A patent/FR1463667A/en not_active Expired
- 1966-01-17 NL NL6600575A patent/NL144239B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IL24876A (en) | 1969-06-25 |
| FR1463667A (en) | 1966-12-23 |
| NL6600575A (en) | 1966-07-19 |
| BE675130A (en) | 1966-07-14 |
| SE317656B (en) | 1969-11-24 |
| NL144239B (en) | 1974-12-16 |
| DE1245343B (en) | 1967-07-27 |
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