Process for removing rhodium-containing catalyst residue from hy

Details Process for removing rhodium-containing catalyst residue from hy Process for removing rhodium-containing catalyst residue from hy

1989-11-20

1991-01-15

Teskin, Fred

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

Synthetic resins

Treating polymer containing material or treating a solid...

521 32, 521 33, 5253293, 210688, C08F 608

Patent

active

049855409

ABSTRACT:
A process is provided for removing rhodium-containing catalyst residue from a solution of hydrogenated nitrile rubber. The process utilizes an ion exchange resin which must be both macroreticular and modified with a selected amine, thiol, carbodithioate, thiourea and/or dithiocarbamate functional group. The process is capable of removing rhodium from viscous rubber solutions containing less than 10 ppm rhodium. In a preferred embodiment, the process is undertaken in an ion-exchange column.

REFERENCES:
patent: 3700637 (1972-10-01), Finch, Jr.
patent: 3755393 (1973-08-01), Kniese et al.
patent: 3994719 (1976-11-01), Corte et al.
patent: 4396761 (1983-08-01), Willis et al.
patent: 4464515 (1984-08-01), Rempel et al.
patent: 4510293 (1985-04-01), Kubo et al.
patent: 4595749 (1986-06-01), Hoxmeier
Chemical Abstracts 75:10878e (1971).
U.S. patent appl'n. Ser. No. 07/226,883, filed Aug. 1988.

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