JPS54125636A - Preparation of 6-chloro-3-toluiding-4-sulfonic acid - Google Patents

Preparation of 6-chloro-3-toluiding-4-sulfonic acid

Info

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
Application number
JP3099078A
Other languages
Japanese (ja)
Other versions
JPS5630345B2 (en
Inventor
Kazuo Noguchi
Tetsuo Fukuda
Jiro Amano
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.)
Dainichiseika Color and Chemicals Mfg Co Ltd
Original Assignee
Dainichiseika Color and Chemicals Mfg 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 Dainichiseika Color and Chemicals Mfg Co Ltd filed Critical Dainichiseika Color and Chemicals Mfg Co Ltd
Priority to JP3099078A priority Critical patent/JPS54125636A/en
Publication of JPS54125636A publication Critical patent/JPS54125636A/en
Publication of JPS5630345B2 publication Critical patent/JPS5630345B2/ja
Granted legal-status Critical Current

Links

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  • 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
JP3099078A 1978-03-20 1978-03-20 Preparation of 6-chloro-3-toluiding-4-sulfonic acid Granted JPS54125636A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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