Method of manufacturing ultra-low viscosity hydroxyalkyl cellulose through partial neutralization method
The present invention relates to a method of manufacturing ultra-low viscosity hydroxyalkyl cellulose through a partial neutralization method, and the method includes: 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; decomposing the hydroxyalkyl cellulose by using hydrogen peroxide; and performing second neutralization of the hydroxyalkyl cellulose. Through the aforementioned method, ultra-low viscosity hydroxyalkyl cellulose can be manufactured while preventing a process problem, such as swelling, which may occur through the decomposition of an acid treatment.
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.
2. The method of claim 1 , wherein after the second neutralization, a post-process including washing, filtering, drying, pulverization, and distribution is performed.