Method for removing hydrogenation catalyst residues from hydroge

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

1981-08-21

1983-08-02

Henderson, C. A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528498, 528501, 528503, C08F 608

Patent

active

043967612

ABSTRACT:
A process is disclosed for removing hydrogenation catalyst residues from hydrogenated conjugated diene polymers by contacting a hydrocarbon solution of said polymers with an aqueous dilute solution of an alpha-hydroxysulfonic 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.

REFERENCES:
patent: 4316008 (1982-02-01), Willis

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