Process for treating a material comprising a polymer by hydrolysis
AssigneeRhone-Poulenc Chimie
InventorsEmmanuel Dos Santos, Pascal Mettvier, Michel Gubelmann
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Abstract
Process for the treatment of a material comprising a polymer, especially a polyamide. The process consists in subjecting the polyamide to hydrolysis in the presence of a hydrolyzing nitrous grouping and transforming the hydrolyzed compounds into diacids. The treatment of a polyamide 6.6 results in the recovery of adipic acid and other diacids corresponding to the participating acid monomer and to the transformation of at least one part of the diamine monomer into diacids.
Claims23
A process for treating a material comprising a polymer containing an amide functional group, said process comprising hydrolyzing said material in the presence of nitrous groups dissolved in a hydrolysis medium to obtain a hydrolyzed material and oxidizing said hydrolyzed material;
- wherein said polymer comprises a polyamide obtained by the polycondensation of a diamine with a diacid.
A process for treating a polymer containing amide functional groups made by the polycondensation of a dicarboxylic acid with a diamine, said process comprising treating the polymer with a hydrolysis medium having nitrous groups dissolved therein, wherein said treating generates the original dicarboxylic acid, and the original diamine, and converts a portion of the original diamine into a dicarboxylic acid.
Dependencies are inferred from the claim text.