Patent ID: 8173021
Filing Date: 2012-05-08
Classification: A61K,C07K,C08B,C12N

Abstract:
1. A method for the preparation of sulfated cellulose membranes, comprising the steps of: a) adding chloro-sulfonic acid to pyridine at a temperature below or equal to 0° C. to form a mixture; b) reacting said mixture at a temperature of 60° C. or above to form a reactant mixture; c) cooling the reactant mixture at a temperature of 40° C. or below; d) adding cellulose membrane to said reactant mixture and e) reacting the cellulose membrane and reactant mixture at a temperature of 40° C. or below to obtain a sulfated cellulose membrane, wherein said sulfated cellulose membrane has a degree of sulfation of the cellulose in a range from 0.5 to 15%, in a reaction mixture.