Process for the production of isocyanatoaryl sulfonic acids

Details Process for the production of isocyanatoaryl sulfonic acids Process for the production of isocyanatoaryl sulfonic acids

1980-07-23

1981-07-21

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260239A, 260453PH, 260453AR, 260453AM, C07C11800, C07C14324, C07D22900

Patent

active

042798329

ABSTRACT:
The present invention relates to a new process for the production of isocyanatoaryl sulfonic acids which are optionally present, at least partly, as salts of an inorganic or organic base, by sulfonation of the corresponding carbamic acid chlorides, conversion of the carbamic acid chloride groups into isocyanate groups and optionally, subsequent neutralization of at least some of the sulfonic acid groups present.

REFERENCES:
patent: 3826769 (1974-07-01), Carlson
patent: 3959329 (1976-05-01), Dieterich et al.
patent: 4119658 (1978-10-01), Dieterich
patent: 4144267 (1979-03-01), Dieterich et al.
patent: 4176118 (1979-11-01), Petinaux et al.

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