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1. WO2004111188 - PROCESS FOR THE TREATMENT OF CHITINACEOUS MATERIALS AND FOR THE DEACETYLATION OF CHITIN

Publication Number WO/2004/111188
Publication Date 23.12.2004
International Application No. PCT/US2004/016284
International Filing Date 24.05.2004
IPC
C07H 5/04 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
5Compounds containing saccharide radicals in which the hetero bonds to oxygen have been replaced by the same number of hetero bonds to halogen, nitrogen, sulfur, selenium, or tellurium
04to nitrogen
C07H 5/06 2006.1
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
5Compounds containing saccharide radicals in which the hetero bonds to oxygen have been replaced by the same number of hetero bonds to halogen, nitrogen, sulfur, selenium, or tellurium
04to nitrogen
06Aminosugars
C08B 37/08 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
BPOLYSACCHARIDES; DERIVATIVES THEREOF
37Preparation of polysaccharides not provided for in groups C08B1/-C08B35/110; Derivatives thereof
08Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
CPC
C08B 37/003
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
BPOLYSACCHARIDES; DERIVATIVES THEREOF
37Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
0006Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
0024beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
00272-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
003Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
Applicants
  • VENTURE CHEMICALS, INC. [US]/[US] (AllExceptUS)
  • COWAN, Jack, C. [US]/[US] (UsOnly)
  • BLANCHARD, Andre, N. [US]/[US] (UsOnly)
  • BENOIT, Catherine, G. [US]/[US] (UsOnly)
  • RODRIGUE, Tammy, L. [US]/[US] (UsOnly)
Inventors
  • COWAN, Jack, C.
  • BLANCHARD, Andre, N.
  • BENOIT, Catherine, G.
  • RODRIGUE, Tammy, L.
Agents
  • HOUSE, Roy, F.
Priority Data
60/476,44006.06.2003US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) PROCESS FOR THE TREATMENT OF CHITINACEOUS MATERIALS AND FOR THE DEACETYLATION OF CHITIN
(FR) PROCEDE DE TRAITEMENT DE MATERIAUX A BASE DE CHITINE ET DE DESACETYLATION DE CHITINE
Abstract
(EN) 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.
(FR) L'invention concerne un procédé de désacétylation de chitine et un procédé de traitement de matériaux à base de chitine permettant d'obtenir de la chitine. Ces procédés sont mis en oeuvre dans un liquide insoluble dans l'eau, non aqueux et non saponifiable présentant un point d'éclair supérieur à environ 100 °C, de préférence un hydrocarbure non aromatique. Le procédé de désacétylation de chitine consiste : à former une suspension de chitine dans le liquide hydrocarbure, de préférence entre environ 0,02 g/cc et environ 0,2 g/cc ; à mélanger cette suspension à une solution d'hydroxyde de métal alcalin ; et à chauffer la suspension à une température d'au moins environ 70 °C pendant une période suffisante pour obtenir le degré désiré de désacétylation. La concentration d'hydroxyde de métal alcalin dans la solution d'hydroxyde de métal alcalin représente au moins 30 % en poids, de préférence au moins 40 % en poids, et idéalement au moins 50 % en poids, et la quantité d'hydroxyde de métal alcalin est suffisante pour présenter un rapport de poids hydroxyde de métal alcalin-chitine compris entre environ (0,35)(AMHMW) / 40 et environ (2,5)(AMHMW) / 40, AMHMW représentant le poids moléculaire de l'hydroxyde de métal alcalin.
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