GB885217A - Production of sorbic acid - Google Patents

Production of sorbic acid

Info

Publication number
GB885217A
GB885217A GB3350358A GB3350358A GB885217A GB 885217 A GB885217 A GB 885217A GB 3350358 A GB3350358 A GB 3350358A GB 3350358 A GB3350358 A GB 3350358A GB 885217 A GB885217 A GB 885217A
Authority
GB
United Kingdom
Prior art keywords
sorbic acid
sorbate
acid
crotonaldehyde
ketene
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
GB3350358A
Inventor
Hubert Jowitt
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.)
Distillers Co Yeast Ltd
Distillers Co Ltd
Original Assignee
Distillers Co Yeast Ltd
Distillers Co Ltd
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 Distillers Co Yeast Ltd, Distillers Co Ltd filed Critical Distillers Co Yeast Ltd
Priority to GB3350358A priority Critical patent/GB885217A/en
Publication of GB885217A publication Critical patent/GB885217A/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
    • C07C51/09—Preparation of carboxylic acids or their salts, halides or anhydrides from carboxylic acid esters or lactones

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

Sorbic acid is produced by reacting ketene with crotonaldehyde in the presence of zinc sorbate as catalyst, and hydrolysing the resulting product to sorbic acid. Ketene is preferably reacted with crotonaldehyde at a temperature in the range from 0 DEG C. to 60 DEG C. with 0.1% to 5% by weight of zinc sorbate. The reaction may be carried out in the presence of an inert solvent or gaseous ketene may be stirred with a mixture of liquid crotonaldehyde and zinc sorbate. The product, which is believed to be a lactone, may be hydrolysed to sorbic acid by treating with an aqueous solution of a mineral acid such as sulphuric acid, after removal of any solvent present. The hydrolysis is preferably effected as described in Specification 868,028 by heating with an aqueous solution of an alkali metal hydroxide, such as sodium hydroxide, to separate solid alkali metal sorbate from the resulting mixture and reacting the sorbate with an acid having a dissociation constant greater than sorbic acid to produce sorbic acid.
GB3350358A 1958-10-21 1958-10-21 Production of sorbic acid Expired GB885217A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3350358A GB885217A (en) 1958-10-21 1958-10-21 Production of sorbic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3350358A GB885217A (en) 1958-10-21 1958-10-21 Production of sorbic acid

Publications (1)

Publication Number Publication Date
GB885217A true GB885217A (en) 1961-12-20

Family

ID=10353811

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3350358A Expired GB885217A (en) 1958-10-21 1958-10-21 Production of sorbic acid

Country Status (1)

Country Link
GB (1) GB885217A (en)

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