Process for dry quaternization of azo compounds

Details Process for dry quaternization of azo compounds Process for dry quaternization of azo compounds

1976-09-20

1978-03-28

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260158, 260205, 260208, 2605676M, C09B 4300

Patent

active

040814360

ABSTRACT:
Certain solid dye bases which are precursors of acrylic fiber dyes and which contain a tertiary nitrogen atom are effectively quaternized in high yield and purity in a "dry state" quaternization process comprising contacting the dye base with an essentially stoichiometric amount of an alkylating agent at a temperature of 30.degree.-90.degree. C., said alkylating agent being added to said dye base gradually at a rate such that the reaction mixture is a free-flowing solid throughout the reaction.

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patent: 3234208 (1966-02-01), Liechti
patent: 3312681 (1967-04-01), Lewis
patent: 3346585 (1967-10-01), Dehnert
patent: 3401158 (1968-09-01), Fisher et al.
patent: 3956271 (1976-05-01), Blass et al.

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