Preparation of chitosan salts in aqueous alcoholic media

Details Preparation of chitosan salts in aqueous alcoholic media Preparation of chitosan salts in aqueous alcoholic media

1989-12-18

1991-10-29

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

536 553, 536119, 536124, C08B 3700, C07H 100, C07H 1300

Patent

active

050617923

ABSTRACT:
Chitosan is converted to dry, free-flowing, water-soluble chitosan salts by heterogeneous reaction between particulate chitosan suspended in about 5 to about 50 parts by weight of a C.sub.1 to C.sub.3 monohydric alcohol containing an amount of water sufficient to raise the dielectric constant of the alcohol to at least about 30 and not more than about 40. Operable acids are slected from defined aliphatic and aromatic carboxylic, aromatic sulphonic, and inorganic acids having a first hydrogen pKa in water at room temperature of less than about 5.

REFERENCES:
patent: 2040879 (1936-05-01), Rigby
patent: 2040880 (1936-05-01), Rigby
patent: 2795579 (1957-06-01), Doczi
patent: 4574150 (1986-03-01), Austin
patent: 4881343 (1989-11-01), Sannan et al.

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