JPS5612339A - Purification of trimethoxybenzoic acid - Google Patents
Purification of trimethoxybenzoic acidInfo
- Publication number
- JPS5612339A JPS5612339A JP8893279A JP8893279A JPS5612339A JP S5612339 A JPS5612339 A JP S5612339A JP 8893279 A JP8893279 A JP 8893279A JP 8893279 A JP8893279 A JP 8893279A JP S5612339 A JPS5612339 A JP S5612339A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- activated carbon
- cooled
- high yield
- 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.)
- Granted
Links
Abstract
PURPOSE: Trimethoxybenzoic acid, which is useful as a medicine or intermediate of agricultural chemical, is heat treated in the presence of water, mineral acid and activated carbon and cooled, after the insoluble part is removed, to produce crystals of purified product with industrial advantage.
CONSTITUTION: Titled compound (especially 3,4,5-trimethoxybenzoic acid) containing tar, isomers and methyl esters as impurities is heat treated in the presence of water, a mineral acid, preferably hydrochloric acid, and activated carbon. The treatment with activated carbon be effected in any stage, at the same time as the heat treatment or before or after it. After the insoluble part is separated, the solution is cooled to form the crystals of title compound in high yield. The present method can remove the tar and simultaneously hydrolyze the esters to free acid, thus giving high-purity product in high yield. Further, since an organic solvent is unnecessary, the operations are simple and safe.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8893279A JPS5612339A (en) | 1979-07-12 | 1979-07-12 | Purification of trimethoxybenzoic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8893279A JPS5612339A (en) | 1979-07-12 | 1979-07-12 | Purification of trimethoxybenzoic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5612339A true JPS5612339A (en) | 1981-02-06 |
JPS621378B2 JPS621378B2 (en) | 1987-01-13 |
Family
ID=13956661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8893279A Granted JPS5612339A (en) | 1979-07-12 | 1979-07-12 | Purification of trimethoxybenzoic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5612339A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102584573A (en) * | 2012-01-11 | 2012-07-18 | 杭州职业技术学院 | Synthesis method of methoxyfenozide key intermediate-substituted methyl benzoyl chloride |
-
1979
- 1979-07-12 JP JP8893279A patent/JPS5612339A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102584573A (en) * | 2012-01-11 | 2012-07-18 | 杭州职业技术学院 | Synthesis method of methoxyfenozide key intermediate-substituted methyl benzoyl chloride |
Also Published As
Publication number | Publication date |
---|---|
JPS621378B2 (en) | 1987-01-13 |
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