Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid

Details Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid

1997-12-09

1999-04-06

Higel, Floyd D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

534728, C07C10500

Patent

active

058921052

ABSTRACT:
A process for preparing amine salts of 4-nitrotoluene-2-sulfonic acid by sulfonation of nitrotoluene with oleum, subsequent dilution of the reaction mixture with water and extraction with lipophilic amines, wherein the acidic aqueous solution of the sulfonation product is partially neutralized with mineral bases.
The compounds prepared according to the invention are particularly suitable for preparing dyes.

REFERENCES:
patent: 2378168 (1945-06-01), Witte
patent: 3840591 (1974-10-01), Lee et al.
patent: 4310331 (1982-01-01), Arsac et al.
patent: 4382039 (1983-05-01), Goldschmitt et al.
patent: 4803017 (1989-02-01), Bugner et al.

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