Process for the preparation of the lithium salt of a fiber-react

Details Process for the preparation of the lithium salt of a fiber-react Process for the preparation of the lithium salt of a fiber-react

1988-03-25

1990-07-03

Higel, Floyd D.

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

Organic compounds

Azo

534582, 534583, 534642, 534887, C09B 6251, C09B 62507, C09B 6726

Patent

active

049392425

ABSTRACT:
A process for the preparation of the lithium azo compound of the formula ##STR1## having an Na content of less than 0.2% by weight, in particular less than 0.1% by weight, in which the lithium salt of 4-(.beta.-sulfatoethylsulfonyl)-aniline is diazotized in an aqueous solution or in an aqueous solution containing a water-miscible organic solvent by means of nitrosylsulfuric acid, and the product is coupled with the lithium salt of 1-hydroxy-7-acetylaminonaphthalene-3-sulfonic acid.

REFERENCES:
patent: 3600376 (1971-08-01), Franklin
patent: 3635944 (1972-01-01), Litke
patent: 3655640 (1972-04-01), Hoare
patent: 3701624 (1972-10-01), Franklin
patent: 4313872 (1982-02-01), Heinrich et al.
patent: 4379937 (1983-04-01), Corso et al.
patent: 4607096 (1986-08-01), Landler et al.
patent: 4652634 (1987-03-01), Mischke et al.
patent: 4707545 (1987-11-01), Meininger et al.
patent: 4760134 (1988-07-01), Corso et al.

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