PROCESS FOR PRODUCING ISOCYANATE-ARYL-SULPHONIC ACIDS THAT MAY CONSTITUTE, AT LEAST PARTIALLY, THE SALTS OF MINERAL OR ORGANIC BASES

摘要

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.