PROCESS FOR PREPARATION OF DEPOLYMERIZED CHITOSAN IN HETEROGENEOUS SYSTEM

PROCESS FOR PREPARATION OF DEPOLYMERIZED CHITOSAN IN HETEROGENEOUS SYSTEM

PROBLEM TO BE SOLVED: To provide a process for efficient preparation of a depolymerized chitosan which has a higher quality and safety than conventional one. SOLUTION: The process for the preparation of depolymerized chitosan comprises the hydrolysis of chitosan granules in the presence of hydrochlo...

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Hauptverfasser: ODANAKA SUSUMU, YAKO HIROSHI
Format: Patent
Sprache:eng
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CHEMISTRY
COMPOSITIONS BASED THEREON
DERIVATIVES THEREOF
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
POLYSACCHARIDES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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creator ODANAKA SUSUMU
YAKO HIROSHI
description PROBLEM TO BE SOLVED: To provide a process for efficient preparation of a depolymerized chitosan which has a higher quality and safety than conventional one. SOLUTION: The process for the preparation of depolymerized chitosan comprises the hydrolysis of chitosan granules in the presence of hydrochloric acid. The hydrolysis is carried out without dissolving the chitosan, while stirring the heterogeneous system. After the hydrolysis, the separation and purification are carried out in an organic solvent to give a hydrochloride of a depolymerized chitosan. After the hydrolysis the separation and purification are carried out by adjusting the pH to 7-12 in an organic solvent to give free depolymerized chitosan.
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subjects CHEMISTRY
COMPOSITIONS BASED THEREON
DERIVATIVES THEREOF
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
POLYSACCHARIDES
THEIR PREPARATION OR CHEMICAL WORKING-UP
title PROCESS FOR PREPARATION OF DEPOLYMERIZED CHITOSAN IN HETEROGENEOUS SYSTEM
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