Process for the preparation of activated chitosans and their use

Details Process for the preparation of activated chitosans and their use Process for the preparation of activated chitosans and their use

1993-12-14

1995-08-15

Redding, David A.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 552, 536 553, 536124, C08B 3708, C07H 100

Patent

active

054420482

ABSTRACT:
The invention relates to a process for the preparation of activated chitosans, in which process a chitosan is reacted with an acid for salt formation, preferably followed by a reaction with a base. The addition of acid and the addition of bases which is preferably to be effected in the activation are carried out in a suspending agent which largely prevents the chitosan salts from dissolving, suitable suspending agents can be both aqueous solutions of inorganic salts and organic or aqueous-organic solvents. The invention also relates to a process for the preparation of both water-soluble and water-insoluble chitosan derivatives by reacting the activated chitosans with reagents which are generally suitable for the reaction of polysaccharides or amines.

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