JPS54125636A - Preparation of 6-chloro-3-toluiding-4-sulfonic acid - Google Patents
Preparation of 6-chloro-3-toluiding-4-sulfonic acidInfo
- Publication number
- JPS54125636A JPS54125636A JP3099078A JP3099078A JPS54125636A JP S54125636 A JPS54125636 A JP S54125636A JP 3099078 A JP3099078 A JP 3099078A JP 3099078 A JP3099078 A JP 3099078A JP S54125636 A JPS54125636 A JP S54125636A
- Authority
- JP
- Japan
- Prior art keywords
- toluidine
- hydrochloride
- sulfate
- give
- chlorinated
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain the title compound which is a base for red soluble pigments lake red C efficiently, by chlorinating and baking available m-toluidine according to a simple and unpolluting means.
CONSTITUTION: Sulfate or hydrochloride of m-toluidine is finely dispersed in a solvent, e.g. o-dichlorobenzene, inert to chlorine, or m-toluidine is converted into sulfate or hydrochloride. The mixture is chlorinated by chlorine gas to give a nuclear chlorinated m-toluidine sulfate or hydrochloride, and a necessary amount of suefuric acid is added to bake the reaction mixture. Alternatively, the nuclear chlorination product is isolated and baked by addition of a necessary amount of sulfuric acid in the presence or absence of an inert solvent to give the desired substance.
EFFECT: Very advantageous in equipment and process.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3099078A JPS54125636A (en) | 1978-03-20 | 1978-03-20 | Preparation of 6-chloro-3-toluiding-4-sulfonic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3099078A JPS54125636A (en) | 1978-03-20 | 1978-03-20 | Preparation of 6-chloro-3-toluiding-4-sulfonic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54125636A true JPS54125636A (en) | 1979-09-29 |
JPS5630345B2 JPS5630345B2 (en) | 1981-07-14 |
Family
ID=12319045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3099078A Granted JPS54125636A (en) | 1978-03-20 | 1978-03-20 | Preparation of 6-chloro-3-toluiding-4-sulfonic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54125636A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0077537A2 (en) * | 1981-10-17 | 1983-04-27 | Hoechst Aktiengesellschaft | Process for preparing 6-chloro-3-toluidino-4-sulphonic acid |
CN110483339A (en) * | 2019-07-30 | 2019-11-22 | 浙江工业大学 | A method of CLT acid is prepared by raw material of meta-aminotoluene |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS505337A (en) * | 1973-04-18 | 1975-01-21 | ||
JPS5265245A (en) * | 1975-11-26 | 1977-05-30 | Dainichi Seika Kogyo Kk | Preparation of 6_chloro-3-toludine-4-sulfonic acid |
-
1978
- 1978-03-20 JP JP3099078A patent/JPS54125636A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS505337A (en) * | 1973-04-18 | 1975-01-21 | ||
JPS5265245A (en) * | 1975-11-26 | 1977-05-30 | Dainichi Seika Kogyo Kk | Preparation of 6_chloro-3-toludine-4-sulfonic acid |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0077537A2 (en) * | 1981-10-17 | 1983-04-27 | Hoechst Aktiengesellschaft | Process for preparing 6-chloro-3-toluidino-4-sulphonic acid |
CN110483339A (en) * | 2019-07-30 | 2019-11-22 | 浙江工业大学 | A method of CLT acid is prepared by raw material of meta-aminotoluene |
CN110483339B (en) * | 2019-07-30 | 2022-01-25 | 浙江工业大学 | Method for preparing CLT acid by using m-toluidine as raw material |
Also Published As
Publication number | Publication date |
---|---|
JPS5630345B2 (en) | 1981-07-14 |
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