Title:
PROCESS FOR THE TREATMENT OF CHITINACEOUS MATERIALS AND FOR THE DEACETYLATION OF CHITIN
Document Type and Number:
WIPO Patent Application WO2004111188
Kind Code:
A3
Abstract:
Disclosed is a process for the deacetylation of chitin and a process for the treatment of chitinaceous materials to obtain chitin which processes are conducted in a non-saponifiable, non-aqueous, water insoluble liquid having a flash point greater than about 100°C, preferably a non-aromatic hydrocarbon. The process for the deacetylation of chitin comprises suspending chitin in the hydrocarbon liquid, preferably from about 0.02 g/cc to about 0.2 g/cc, mixing therewith an alkali metal hydroxide solution, and heating the suspension at a temperature at least about 70°C for a period of time sufficient to obtain the desired degree of deacetylation. The concentration of alkali metal hydroxide in the alkali metal hydroxide solution is at least 30% by weight, preferably at least 40% by weight, and most preferably at least 50% by weight, and the quantity of alkali metal hydroxide is sufficient to provide an alkali metal hydroxide to chitin weight ratio from about (0.35)(AMHMW) / 40 to about (2.5)(AMHMW) / , 40 where AMHMW is the molecular weight of the alkali metal hydroxide.
Inventors:
COWAN JACK C (US)
BLANCHARD ANDRE N (US)
BENOIT CATHERINE G (US)
RODRIGUE TAMMY L (US)
BLANCHARD ANDRE N (US)
BENOIT CATHERINE G (US)
RODRIGUE TAMMY L (US)
Application Number:
PCT/US2004/016284
Publication Date:
September 15, 2005
Filing Date:
May 24, 2004
Export Citation:
Assignee:
VENTURE CHEMICALS INC (US)
COWAN JACK C (US)
BLANCHARD ANDRE N (US)
BENOIT CATHERINE G (US)
RODRIGUE TAMMY L (US)
COWAN JACK C (US)
BLANCHARD ANDRE N (US)
BENOIT CATHERINE G (US)
RODRIGUE TAMMY L (US)
International Classes:
C07H5/04; C07H5/06; C08B37/08; C12N; (IPC1-7): C08B37/08; C07H5/04; C07H5/06
Foreign References:
| US2040879A | 1936-05-19 | |||
| US4195175A | 1980-03-25 | |||
| US4619995A | 1986-10-28 |
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