GB858485A - Improvements in or relating to the manufacture of ketene - Google Patents
Improvements in or relating to the manufacture of keteneInfo
- Publication number
- GB858485A GB858485A GB2370658A GB2370658A GB858485A GB 858485 A GB858485 A GB 858485A GB 2370658 A GB2370658 A GB 2370658A GB 2370658 A GB2370658 A GB 2370658A GB 858485 A GB858485 A GB 858485A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ketene
- tube
- acetone
- vessel
- relating
- 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
- C07C45/88—Preparation of ketenes or dimeric ketenes from ketones
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Ketene is prepared by the thermal decomposition of acetone in a pyrolysis vessel the inner surface of which is composed of a steel having the composition of from 14 to 18% chromium, a maximum of 0,12% carbon and the balance substantially entirely iron. The vessel may be made of "Sandvik" (Registered Trade Mark) 2c-34, in the form of a straight, serpentine, or coiled tube. In a preferred method, acetone is continuously passed in vapour form through such an elongated tube at about 700-800 DEG C. at a mass velocity of about 10,000 to 40,000 lbs./sq. in./hr. with a contact time of about 0,01 to 0,1 sec.; there is a pressure differential between the inlet and outlet of the tube of up to about 15 p.s.i. Examples of this method are given. Specifications 655,101, 662,356 and 668,268 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2370658A GB858485A (en) | 1958-07-23 | 1958-07-23 | Improvements in or relating to the manufacture of ketene |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2370658A GB858485A (en) | 1958-07-23 | 1958-07-23 | Improvements in or relating to the manufacture of ketene |
Publications (1)
Publication Number | Publication Date |
---|---|
GB858485A true GB858485A (en) | 1961-01-11 |
Family
ID=10199971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2370658A Expired GB858485A (en) | 1958-07-23 | 1958-07-23 | Improvements in or relating to the manufacture of ketene |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB858485A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1244159B (en) * | 1964-12-05 | 1967-07-13 | Eastman Kodak Co | Process and device for the production of ketenes by pyrolysis of compounds which can be cleaved to form ketenes |
-
1958
- 1958-07-23 GB GB2370658A patent/GB858485A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1244159B (en) * | 1964-12-05 | 1967-07-13 | Eastman Kodak Co | Process and device for the production of ketenes by pyrolysis of compounds which can be cleaved to form ketenes |
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