Title: Process for removing hydrogenation catalyst residue from hydrogenated polymers
Application Number: 01804756 Application Date: 2001.02.09
Publication Number: 1416436 Publication Date: 2003.05.07
Approval Pub. Date: 2004.07.14 Granted Pub. Date: 2004.07.14
International Classifi-cation: C08C2/04;C08C19/02;C08F6/02;C08F8/04;C08F297/04
Applicant(s) Name: Kratone Plymers Research B.V. Address:
Inventor(s) Name: A.H. Horman H.J.A. De Smet;A. Villena
Attorney & Agent: sun ai
Abstract:
    This invention relates to a process for removing hydrogenation catalyst residue from hydrogenated polymers comprising: (I) treating a polymer cement comprising an unsaturated polymer in an inert water-immiscible liquid with a hydrogen source in the presence of a hydrogenation catalyst; (II) contacting the polymer cement of step (I) with one or more aqueous solution(s) of a weak acid having a pKa greater than 1.5 (determined in water at 25 DEG C); (III) contacting the polymer cement of step (II) with one or more aqueous solution(s) of a weak base having a pKa smaller than 10.5; and (IV) separating the hydrogenated polymer.
Time: 7