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GB883492A - Process for the manufacture of sorbic acid - Google Patents

Process for the manufacture of sorbic acid

Info

Publication number
GB883492A
GB883492A GB411/59A GB41159A GB883492A GB 883492 A GB883492 A GB 883492A GB 411/59 A GB411/59 A GB 411/59A GB 41159 A GB41159 A GB 41159A GB 883492 A GB883492 A GB 883492A
Authority
GB
United Kingdom
Prior art keywords
sorbic acid
crotonaldehyde
distilling
fatty acid
solvent
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
GB411/59A
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.)
Hoechst AG
Original Assignee
Hoechst AG
Farbwerke Hoechst AG
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 Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Publication of GB883492A publication Critical patent/GB883492A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C57/00—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms
    • C07C57/02—Unsaturated compounds having carboxyl groups bound to acyclic carbon atoms with only carbon-to-carbon double bonds as unsaturation
    • C07C57/03—Monocarboxylic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

Sorbic acid is prepared by reacting ketene with crotonaldehyde at a temperature of at least 20 DEG C. and preferably below 50 DEG C. in the presence of at least one fatty acid salt of cadmium, iron, nickel, mercury, cobalt or zinc, in which the fatty acid component has at least 4 carbon atoms, and at least one inert solvent, which may be excess crotonaldehyde, distilling off the solvent and unreacted crotonaldehyde, and distilling the polymeric product so obtained, which still contains the catalyst, in the presence of at least one inert gas and with the exclusion of oxygen to yield sorbic acid. Distillation temperatures of 125 DEG C.-270 DEG C. may be used for decomposing the polymer, while an alkali metal compound having a distinct alkaline reaction and/or 2%-15% of an inert solvent of higher boiling point than sorbic acid may be added; reduced pressure is preferred, but atmospheric or superatmospheric pressures may be used.
GB411/59A 1958-01-04 1959-01-05 Process for the manufacture of sorbic acid Expired GB883492A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE883492X 1958-01-04

Publications (1)

Publication Number Publication Date
GB883492A true GB883492A (en) 1961-11-29

Family

ID=6832058

Family Applications (1)

Application Number Title Priority Date Filing Date
GB411/59A Expired GB883492A (en) 1958-01-04 1959-01-05 Process for the manufacture of sorbic acid

Country Status (1)

Country Link
GB (1) GB883492A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461158A (en) * 1964-12-01 1969-08-12 Hoechst Ag Process for preparing sorbic acid and its salts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461158A (en) * 1964-12-01 1969-08-12 Hoechst Ag Process for preparing sorbic acid and its salts

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