Method for removing hydrogenation catalyst residues from...

Details Method for removing hydrogenation catalyst residues from... Method for removing hydrogenation catalyst residues from...

C - Chemistry, Metallurgy

08

F

400/2042, 402/42

C08F 6/08 (2006.01) C08C 2/04 (2006.01) C08F 6/02 (2006.01)

Patent

CA 1218796

METHOD FOR REMOVING HYDROGENATION CATALYST RESIDUES FROM HYDROGENATED CONJUGATED DIENE POLYMERS Abstract of the Disclosure A process is disclosed for removing hydrogenation catalyst residues from hydrogenated conjugated diene polymers by contacting a hydrocarbon solu- tion of said polymers with an aqueous dilute solution of an alpha-hydroxysul- fonic acid, separating the aqueous phase from the hydrocarbon phase, removing the hydrocarbon solvent from the hydrocarbon phase, producing a solid polymer, and applying heat and/or vacuum to the solid polymer to remove the residual alpha-hydroxysulfonic acid.

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