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Method for the controlled oxidation of polysaccharides

Reference

86593-01

Patents status

European patent application FR0408402 filed on July 29, 2004 and entitled “Procédé d’oxydation controlée de polysaccharides”

Inventors

Michel VIGNON
Suzelei MONTANARI
Daniel SAMAIN
Jean-Stéphane CONDOET

commercial status

Exclusive or non-exclusive licence, except in some fields
R&D Partnership

Laboratory

CERMAV, centre de recherche sur les macromolecules végetales
LGC – Laboratoire de génie chimique, France.
http://www.cermav.cnrs.fr/
http://lgc.inp-toulouse.fr/

Description

CONTEXT

The oxidation of polysaccharides by nitrogen dioxide (NO2/N2O4) as oxidizing agent is a well known reaction. The use of NO2 gas has, however, proved to be tricky resulting in particular in heterogeneities. Various methods of oxidation in organic solvents.

TECHNICAL DESCRIPTION

This invention describes a new method for the oxidation of polysaccharides that makes it possible to obtain variable mass %carboxylic acid content ranging, in the case of cellulose, up to approximately 25,5% (which corresponds to 100% oxidation of the primary hydroxyl groups), distributed homogenously, regardless of the degree of oxydation.

BENEFITS

  • Homogeneously carboxylated polysaccharides
  •  Clean process
  • High modification level 

INDUSTRIAL APPLICATIONS

  • Food industry : thickeners, stabilizers, surfactants for low-calorie food products,
  • Paint, paper or food industry: steric stabilizers for fillers,
  • Pharmaceuticals applications: excipients, agents for controlling the release of active ingredients carriers for ointments or for creams,
  • Surgery applications : Bioresorbables threads and/or for tissue or organ repair in human and in animals,
  • Cosmetic applications: viscosity modifiers and gelling agents,- Agents for the complexing or sequestering of metal ions… 

For further information, please contact us (Ref 86593-01)

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