GB1087163A - Production of ketene - Google Patents
Production of keteneInfo
- Publication number
- GB1087163A GB1087163A GB1126365A GB1126365A GB1087163A GB 1087163 A GB1087163 A GB 1087163A GB 1126365 A GB1126365 A GB 1126365A GB 1126365 A GB1126365 A GB 1126365A GB 1087163 A GB1087163 A GB 1087163A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acetic acid
- ketene
- water
- added
- vapour
- 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
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/87—Preparation of ketenes or dimeric ketenes
- C07C45/89—Preparation of ketenes or dimeric ketenes from carboxylic acids, their anhydrides, esters or halides
Abstract
Ketene is produced by vapour phase catalytic pyrolysis of acetic acid in the presence of 1-15% by weight of the acetic acid vapour of water, introduced into the pyrolysis zone together with the acetic acid. The water may be added prior to or after the vaporization of the acetic acid and may be in liquid or vapour form. Acetic anhydride may also be added to the feed to suppress anhydride formation during the pyrolysis. The reaction is carried out between 625 DEG and 750 DEG C. and at a pressure between atmospheric and 20 p.s.i. A suitable catalyst is methyl phosphate. The vapours are allowed to remain in the reactor for between 0.01 and 5.0 seconds and ammonia may be added to the issuing mixture to neutralize the catalyst and prevent combination of the ketene with the acetic acid or water. The ketene is separated from the mixture by cooling.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US35409064A | 1964-03-23 | 1964-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1087163A true GB1087163A (en) | 1967-10-11 |
Family
ID=23391839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1126365A Expired GB1087163A (en) | 1964-03-23 | 1965-03-17 | Production of ketene |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE661501A (en) |
| DE (1) | DE1250811B (en) |
| GB (1) | GB1087163A (en) |
| NL (1) | NL6503703A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105107222A (en) * | 2015-09-17 | 2015-12-02 | 湖州新奥特医药化工有限公司 | Circulating pyrolysis gas quenching device |
-
0
- DE DENDAT1250811D patent/DE1250811B/en active Pending
-
1965
- 1965-03-17 GB GB1126365A patent/GB1087163A/en not_active Expired
- 1965-03-23 BE BE661501D patent/BE661501A/xx unknown
- 1965-03-23 NL NL6503703A patent/NL6503703A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105107222A (en) * | 2015-09-17 | 2015-12-02 | 湖州新奥特医药化工有限公司 | Circulating pyrolysis gas quenching device |
Also Published As
| Publication number | Publication date |
|---|---|
| BE661501A (en) | 1965-09-23 |
| DE1250811B (en) | 1967-09-28 |
| NL6503703A (en) | 1965-09-24 |
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