GB823233A - Production of sorbic acid - Google Patents
Production of sorbic acidInfo
- Publication number
- GB823233A GB823233A GB7298/56A GB729856A GB823233A GB 823233 A GB823233 A GB 823233A GB 7298/56 A GB7298/56 A GB 7298/56A GB 729856 A GB729856 A GB 729856A GB 823233 A GB823233 A GB 823233A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- oxidation
- dialkoxyhexanoic
- compound
- tetraalkoxyhexane
- 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
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
- C07C51/377—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (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 eliminating the elements of an alkanol from a 3,5-dialkoxyhexanoic acid, each molecule of the compound undergoing this dealcoholation forming two molecules of alkanol and a molecule of sorbic acid. The dealcoholation is preferably effected by heating the said dialkoxy acid in the presence of a strong base, such as sodium, potassium, lithium, calcium or barium hydroxides, the alcohol produced being distilled off during or after the reaction. The 3,5-dialkoxyhexanoic acid may be obtained by hydrolysing 1,1,3,5-tetra-alkoxyhexane to produce a 3,5-dialkoxyhexanal, for example by reacting the tetraalkoxyhexane batchwise or continuously with water in the presence of an acid, followed by oxidation of the 3,5-dialkoxyhexanal, for example using air or other oxygen-containing gas in the presence of a multivalent metal, e.g. cobalt or manganese, or a compound of such a metal, and preferably in the presence of an oxidation resistant solvent, such as acetic or formic acid. Alternatively, the 1,1,3,5-tetraalkoxyhexane may be hydrolysed and oxidized simultaneously to produce the 3,5-dialkoxyhexanoic acid by passing an oxygen-containing gas through a solution of the tetra-alkoxyhexane in an oxidation-resistant solvent, e.g. acetic acid, containing a minor amount of water and an oxidation catalyst, such as a manganese or cobalt compound. If desired, an oxidation promoter, such as acetaldehyde, may be added to the reaction mixture.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US823233XA | 1955-03-08 | 1955-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB823233A true GB823233A (en) | 1959-11-11 |
Family
ID=22170481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7298/56A Expired GB823233A (en) | 1955-03-08 | 1956-03-08 | Production of sorbic acid |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB823233A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1203760B (en) * | 1961-05-09 | 1965-10-28 | Stamicarbon | Process for the production of sorbic acid alkyl esters |
-
1956
- 1956-03-08 GB GB7298/56A patent/GB823233A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1203760B (en) * | 1961-05-09 | 1965-10-28 | Stamicarbon | Process for the production of sorbic acid alkyl esters |
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