| 摘要 |
PROBLEM TO BE SOLVED: To efficiently obtain a cellulose derivative for thickeners, binders, stabilizers, etc., by treating pulp with an enzyme such as the enzyme capable of hydrolyzing β-1,4 glycoside bonds before chemically modifying the pulp, suppressing generation of microgels and improving filterability. SOLUTION: This production of a cellulose derivative for thickeners, binders, stabilizers, suspensions, etc., is to prepare a slurry from pulp with an acetic acid buffer having pH6, add an enzyme such as xylanase which is the enzyme capable of hydrolyzing β-1, 4-glycoside bonds and obtained from Bacillus sp. SD 902 (FERM-P-13356), treat the pulp slurry for 3 hours with agitating at 60 deg.C, feltering and dehydrating the pulp through a Buchner funnel and obtain the enzyme-treated pulp, add the enzyme-treated pulp to 88% isopropanol to prepare a slurry, add sodium hydroxide to bring to alkali cellulose, carry out chemical modifications such as methyl etherification, hydroxypropyl etherification, carboxymethyl etherification, etc., by adding chlorinated compounds and obtain the objective compound derivative. |
