Process for the production of sulfuric acid semiester compounds

Details Process for the production of sulfuric acid semiester compounds Process for the production of sulfuric acid semiester compounds

1978-05-31

1982-02-16

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260458R, 260459R, 260147, 260148, 260149, 260150, 260151, 260158, 260160, 260161, 260162, 260163, 260176, 260184, 260193, 260194, 260196, 260197, 260198, 260199, 260200, 260201, 260205, 260206, 260207, 2602071, 2602075, 260208, 2603145, 260335, 260459, 260336, 260372, 260374, C09B 130, C09B 4324, C09B 4500, C09B 5714

Patent

active

043158650

ABSTRACT:
Improved process for the sulfatation of the hydroxy group of a .beta.-hydroxy-ethylsulfonyl group present in compounds selected from the dyestuff class which comprises carrying out the reaction in a machine operating with a kneading action and effect and with the use of only 1 to 5 times the equimolar amount of a concentrated sulfuric acid, of oleum or sulfur dioxide itself. The .beta.-sulfatoethylsulfonyl group containing dyestuffs, thus prepared have a high purity and are obtained in a high yield and esterification rate. Above all, the novel process is distinguished by a highly reduced salt and acid content of the waste water.

REFERENCES:
patent: 2134521 (1938-10-01), Knight
patent: 2755195 (1956-07-01), Grubenmann
patent: 2784204 (1957-03-01), Heyna et al.
patent: 2912428 (1959-11-01), Gaertner et al.
patent: 3177190 (1965-04-01), Lange et al.
patent: 3483182 (1969-12-01), Sugiyama et al.
patent: 3531459 (1970-09-01), Chiddix et al.
patent: 3647827 (1972-03-01), Sugiyama et al.

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