5-sulfoisophthalic acid salts and process for the preparation thereof
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.
1. A composition of matter, said composition of matter comprising the reaction product of a sulfonation solution containing 5-sulfoisophthalic acid and a rubidium cation producing compound.
2. A composition of matter, said composition of matter comprising the reaction product of a sulfonation solution containing 5-sulfoisophthalic acid and a metal cation producing compound wherein said metal cation is selected from the group consisting of manganese, cobalt, nickel, and aluminum.
3. A composition of matter, said composition of matter comprising the reaction product of a sulfonation solution containing 5-sulfoisophthalic acid and a metal cation producing compound wherein said metal cation is copper (II).