5-SULFOISOPHTHALIC ACID SALTS AND PROCESS FOR THE PREPARATION THEREOF

摘要

This invention relates to methods for the production of sodium, potassium, rubidium, cesium, magnesium, manganese, cobalt, nickel, aluminum, copper (II) and zinc salts of 5-sulfoisophthalic acid. In addition, this disclosure describes new compositions of matter, specifically, the rubidium, manganese, cobalt, nickel, and copper (II) salts of 5-sulfoisophthalic acid. The method utilizes the addition of metals salts to a crude sulfonation solution of 5-sulfoisophthalic acid.

主权项

1. A process for the preparation of 5-sulfoisophthalic acid salts, the process comprising the steps of
contacting a sulfonation solution of 5-sulfoisophthalic acid with a metal cation producing compound to form a reaction mixture; maintaining the reaction mixture under conditions sufficient to form a salt of 5-sulfoisophthalic acid; and isolating said salt of 5-sulfoisophthalic acid from the reaction mixture; wherein said metal cation is not lithium.