Patent ID: 6251221
Filing Date: 2001-06-26
Classification: C08B,C08H,D21C,Y02W

Abstract:
A process for preparing cellulose from lignin-poor cellulose-containing feed stocks comprising the steps of:1) washing and rinsing the feed stocks in hot water,2) removing excess water from the product of step 1 to attain a water content of about 15 percent to about 30 percent water,3) impregnating the product of step 2 with an extraction liquor that is the reaction product obtained by reacting a glycol with an organic or Lewis acid,4) metering said impregnated product of step 3 onto a conveyor belt,5) compressing said impregnated product of step 4 to a uniform thickness,6) heating said impregnated product of step 5 to a temperature of about 118.degree. C. to about 145.degree. C.,7) maintaining said impregnated product of step 6 at said temperature of about 118.degree. C. to about 145.degree. C. for about 1 minute to about 6 minutes,8) separating the liquor from the product of step 7.