GB1271991A - Production and refining of isocyanates - Google Patents
Production and refining of isocyanatesInfo
- Publication number
- GB1271991A GB1271991A GB08545/69A GB1854569A GB1271991A GB 1271991 A GB1271991 A GB 1271991A GB 08545/69 A GB08545/69 A GB 08545/69A GB 1854569 A GB1854569 A GB 1854569A GB 1271991 A GB1271991 A GB 1271991A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reaction zone
- phosgene
- organic
- organic amine
- april
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/10—Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,271,991. Production of isocyanates. E. I. DU PONT DE NEMOURS & CO. 10 April, 1969 [11 April, 1968; 19 April, 1968], No. 18545/69. Heading C2C. A continuous process for the preparation of organic isocyanates comprises (1) continuously introducing an organic amine, at least 5 parts of an inert organic solvent per part by weight of organic amine, and at least 1À25 moles of phosgene per equivalent of organic amine into a constant composition primary reaction zone providing an average liquid residence time of from 20 to 120 minutes at a temperature of at least 105‹ C., (2) continuously removing from said primary reaction zone a gaseous mixture of phosgene and by-product HCl and a liquid reaction mass, (3) continuously contacting, in a secondary reaction zone, said removed liquid reaction mass with at least 0À75 moles of phosgene per equivalent of organic amine fed to said primary reaction zone, said secondary reaction zone providing an average liquid residence time of 5-45 minutes at a temperature of at least 130‹ C. and (4) continuously removing a gaseous mixture of phosgene and by-product hydrogen chloride and a solution of organic isocyanate from said secondary reaction zone.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72063068A | 1968-04-11 | 1968-04-11 | |
US72255968A | 1968-04-19 | 1968-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1271991A true GB1271991A (en) | 1972-04-26 |
Family
ID=27110284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08545/69A Expired GB1271991A (en) | 1968-04-11 | 1969-04-10 | Production and refining of isocyanates |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1271991A (en) |
-
1969
- 1969-04-10 GB GB08545/69A patent/GB1271991A/en not_active Expired
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |