JPS5566539A - Preparation of m-phenoxybenzoic acid - Google Patents
Preparation of m-phenoxybenzoic acidInfo
- Publication number
- JPS5566539A JPS5566539A JP13972278A JP13972278A JPS5566539A JP S5566539 A JPS5566539 A JP S5566539A JP 13972278 A JP13972278 A JP 13972278A JP 13972278 A JP13972278 A JP 13972278A JP S5566539 A JPS5566539 A JP S5566539A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- bromoacetate
- cobalt
- oxygen
- water
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
PURPOSE: To obtain the title compound useful as an intermediate of pyrethroid insecticides industrially advantageously, by catalytic oxidation of metaphenoxytoluene in a specific solvent in the presence of cobalt bromoacetate as a catalyst, and by recycling the catalyst and solvent in the reaction process.
CONSTITUTION: m-Phenoxytoluene is oxidized with oxygen or a gas comprising oxygen e.g. air, in a solution of cobalt bromoacetate in a lower fatty acid. The reaction liquid thus obtained is cooled at 60°C or below, and the deposited crystals of m-phenoxybenzoic acid are separated. The remaining mother liquor is distilled by adding an organic solvent capable of forming an azeotropic mixture with water, preferably benzene, to have 4% of water or less, and recycled in the oxidation step mentioned above. This catalyst has advantages of rapid oxidation of said raw material without a reaction initiator and a co-catalyst, and of repeated use in a simple treatment.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13972278A JPS5566539A (en) | 1978-11-13 | 1978-11-13 | Preparation of m-phenoxybenzoic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13972278A JPS5566539A (en) | 1978-11-13 | 1978-11-13 | Preparation of m-phenoxybenzoic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5566539A true JPS5566539A (en) | 1980-05-20 |
Family
ID=15251871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13972278A Pending JPS5566539A (en) | 1978-11-13 | 1978-11-13 | Preparation of m-phenoxybenzoic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5566539A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0034413A1 (en) * | 1980-02-12 | 1981-08-26 | Imperial Chemical Industries Plc | Process for the preparation of diphenylether carboxylic acids |
JPH0443232U (en) * | 1990-08-09 | 1992-04-13 |
-
1978
- 1978-11-13 JP JP13972278A patent/JPS5566539A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0034413A1 (en) * | 1980-02-12 | 1981-08-26 | Imperial Chemical Industries Plc | Process for the preparation of diphenylether carboxylic acids |
JPH0443232U (en) * | 1990-08-09 | 1992-04-13 |
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