GB472988A - Improvements in or relating to the manufacture of ketene - Google Patents

Improvements in or relating to the manufacture of ketene

Info

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
Application number
GB981636A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to GB981636A priority Critical patent/GB472988A/en
Publication of GB472988A publication Critical patent/GB472988A/en
Expired legal-status Critical Current

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.
GB981636A 1936-04-02 1936-04-02 Improvements in or relating to the manufacture of ketene Expired GB472988A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150044122A1 (en) * 2012-03-28 2015-02-12 Aurotec Gmbh Pressure-regulated multi-reactor system

Cited By (2)

* Cited by examiner, † Cited by third party
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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