Patent ID: 9598502
Date: 2017-03-21
CPC Classifications: C08B,C09D

Claim:
1. A method of manufacturing ultra-low viscosity hydroxyalkyl cellulose through a partial neutralization method, comprising: reacting cellulose with an alkalizing agent to obtain alkalized cellulose; reacting the alkalized cellulose with an etherifying agent to obtain hydroxyalkyl cellulose; performing first neutralization of the hydroxyalkyl cellulose in solution from the reacting the alkalized cellulose; decomposing the hydroxyalkyl cellulose in solution from the first neutralization by using hydrogen peroxide; and performing second neutralization of the hydroxyalkyl cellulose in solution from the decomposing, wherein a neutralization ratio of the first neutralization is 40 to 80%, and a neutralization ratio of the second neutralization is 60 to 20%, wherein a use amount of hydrogen peroxide is in a range of 0.1 to 10 wt % based on a total weight of the hydroxyalkyl cellulose, and wherein the decomposing, is a reaction of the hydroxyalkyl cellulose with hydrogen peroxide for 20 minutes to 60 minutes.