Patent ID: 6984731
Filing Date: 2006-01-10
Classification: C08B,C08H,C12P

Abstract:
1. A process for manufacturing cellulose acetate, comprising the steps of: steaming a corncob meal in a sub-critical state at a temperature of 150 to 250° C. and a pressure of 20 to 29 MPa for 10 to 30 minutes to obtain a mixture of a solid product and a solution product, said solid product comprised of cellulose, said solution product comprised of soluble hemicelluloses and polyphenol converted from lignin separated from lignocelluloses in the corncob, said sub-critical state being such that the solid product and the solution product are obtained from the corncob meal solely due to the temperature and pressure conditions of the state; filtering the mixture to separate the solid product; dehydrating the solid product; and acetylating the dehydrated solid product in the presence of acetic anhydride and sulfuric acid to obtain cellulose acetate from the solid product.