Patent ID: 8841441
Filing Date: 2014-09-23
Classification: C08B,C08L,D01D,D01F,Y02P

Abstract:
1. A process for preparing a regenerated biopolymer comprising dissolving a biopolymer in a solution system comprising at least one molten ionic liquid and optionally at least one protic solvent, and precipitating the biopolymers in a coagulation medium optionally comprising water, a protic coagulation agent or a mixture of protic coagulation agents being present in the coagulation medium, wherein the protic coagulation agent is selected from the group consisting of ethane-1,2-diol, propane-1,2,3-triol, diethylene glycol, triethylene glycol, 1,4-butanediol, 1,2-propanediol, 1,3-propanediol, 1,6-hexanediol, and mixtures thereof, and wherein the coagulation medium does not contain more than 5% of carboxylic acid.