GB472988A - Improvements in or relating to the manufacture of ketene - Google Patents
Improvements in or relating to the manufacture of keteneInfo
- Publication number
- GB472988A GB472988A GB981636A GB981636A GB472988A GB 472988 A GB472988 A GB 472988A GB 981636 A GB981636 A GB 981636A GB 981636 A GB981636 A GB 981636A GB 472988 A GB472988 A GB 472988A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ketene
- vapours
- acetone
- cooled
- vessel
- 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)
- Gas Separation By Absorption (AREA)
Abstract
In the production of ketene by pyrolysis of e.g. acetone, acetic acid, acetic anhydride or acetaldehyde, the pyrolysis vapours are cooled substantially to their dew point and the cooled vapours passed through a condenser in which the condensed ketene-forming compound <PICT:0472988/IV/1> flows in countercurrent to the incoming vapours. Acetone from tanks 1 or 2 is pumped through a copper tube 4 heated to 760--810 DEG C. The issuing vapours are cooled in coil 5 to their dew point, i.e. about 54 DEG C., and pass to vessel 7 surmounted by a water-jacketed reflux condenser 6 and connected to tank 2 by line 14. The condensed acetone is maintained in the vessel 7 at about 56 DEG C. and is withdrawn continuously to a rectifying column 11 from the top of which pure acetone is taken off for re-circulation. High boiling constituents are drawn off at 20. Ketene passes by pipe 18 for example, to an absorption column 8 and absorbers 15.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB981636A GB472988A (en) | 1936-04-02 | 1936-04-02 | Improvements in or relating to the manufacture of ketene |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB981636A GB472988A (en) | 1936-04-02 | 1936-04-02 | Improvements in or relating to the manufacture of ketene |
Publications (1)
Publication Number | Publication Date |
---|---|
GB472988A true GB472988A (en) | 1937-10-04 |
Family
ID=9879327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB981636A Expired GB472988A (en) | 1936-04-02 | 1936-04-02 | Improvements in or relating to the manufacture of ketene |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB472988A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150044122A1 (en) * | 2012-03-28 | 2015-02-12 | Aurotec Gmbh | Pressure-regulated multi-reactor system |
-
1936
- 1936-04-02 GB GB981636A patent/GB472988A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150044122A1 (en) * | 2012-03-28 | 2015-02-12 | Aurotec Gmbh | Pressure-regulated multi-reactor system |
US10913048B2 (en) * | 2012-03-28 | 2021-02-09 | Aurotec Gmbh | Pressure-regulated multi-reactor system |
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