GB404333A - Process for the treatment of the reaction mixtures formed in the preparation of acetic anhydride by the thermal decomposition of acetic acid - Google Patents

Process for the treatment of the reaction mixtures formed in the preparation of acetic anhydride by the thermal decomposition of acetic acid

Info

Publication number
GB404333A
GB404333A GB16586/32A GB1658632A GB404333A GB 404333 A GB404333 A GB 404333A GB 16586/32 A GB16586/32 A GB 16586/32A GB 1658632 A GB1658632 A GB 1658632A GB 404333 A GB404333 A GB 404333A
Authority
GB
United Kingdom
Prior art keywords
acetic acid
thermal decomposition
acetic anhydride
preparation
treatment
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
GB16586/32A
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.)
C F Boehringer & Soehne GmbH
Roche Diagnostics GmbH
Original Assignee
C F Boehringer & Soehne GmbH
Boehringer Mannheim GmbH
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 C F Boehringer & Soehne GmbH, Boehringer Mannheim GmbH filed Critical C F Boehringer & Soehne GmbH
Publication of GB404333A publication Critical patent/GB404333A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/54—Preparation of carboxylic acid anhydrides
    • C07C51/573—Separation; Purification; Stabilisation; Use of additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Acetic anhydride is separated from the vapours produced by the thermal decomposition of acetic acid at ordinary or increased pressure, by passing the vapours under a diminished pressure or vacuum into an organic liquid immiscible with water which is a solvent for acetic anhydride and acetic acid and continuously removing the greater part of the water vapour by means of the vacuum so that the quantity of water in the condensate at any time is small. Suitable solvents are tetrahydronaphthalene and toluene. The reaction vapours may be first cooled to about 200 DEG C.; the pressure employed in the condenser may be 35 m.m. and the temperature of the solvent not above 50 DEG C., for instance 28--30 DEG C. Specifications 279,916 and 298,667, [both in Class 2 (iii), Dyes &c.], are referred to.
GB16586/32A 1931-06-11 1932-06-11 Process for the treatment of the reaction mixtures formed in the preparation of acetic anhydride by the thermal decomposition of acetic acid Expired GB404333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE404333X 1931-06-11

Publications (1)

Publication Number Publication Date
GB404333A true GB404333A (en) 1934-01-11

Family

ID=6421773

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16586/32A Expired GB404333A (en) 1931-06-11 1932-06-11 Process for the treatment of the reaction mixtures formed in the preparation of acetic anhydride by the thermal decomposition of acetic acid

Country Status (1)

Country Link
GB (1) GB404333A (en)

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