Patent ID: 6075115
Filing Date: 2000-06-13
Classification: C07C,C08G

Abstract:
A process comprising contacting a 5-sulfo isophthalic acid metal salt or a dialkyl ester of a 5-sulfo isophthalate metal salt, in the presence of a catalyst, with a glycol wherein said catalyst is selected from the group consisting of (1) a catalyst which comprises a titanium compound, a solubility promoter, and a phosphorus source, (2) a catalyst which comprises a titanium compound, a complexing agent, and a phosphorus source, and (3) combinations thereof; said solubility promoter is selected from the group consisting of ortho silicates, ortho zirconates, and combinations thereof; and said complexing agent is selected from the group consisting of hydroxycarboxylic acids, aminocarboxylic acids, and combinations thereof.