Polymeric hydrogenation catalyst containing pendant rhodium cont

Details Polymeric hydrogenation catalyst containing pendant rhodium cont Polymeric hydrogenation catalyst containing pendant rhodium cont

1987-02-19

1989-01-10

Henderson, Christopher

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525340, C08F 804, C08C 1902

Patent

active

047974524

ABSTRACT:
This invention discloses a process for selectively hydrogenating double bonds in unsaturated polymers, such as polybutadiene. The utilization of the process of this invention results in a rate of vinyl hydrogenation which is slowed relative to the rate of backbone hydrogenation. By utilizing the process of this invention, the rate of hydrogenation of double bonds in the polymers is satisfactory. The process of the subject invention more specifically comprises contacting a polymer containing double bonds in its backbone and vinyl unsaturation with hydrogen in the presence of a polymer containing pendant groups having the structural formula --Rh(P.phi..sub.3).sub.2 X wherein .phi. represents a phenyl group and wherein X represents a halogen atom. Polymers having pendant --P.phi..sub.2 --Rh(P.phi..sub.3).sub.2 X groups are highly preferred catalysts for utilization in the selective hydrogenations of this invention.

REFERENCES:
patent: 3993855 (1976-11-01), Kang
patent: 4355140 (1982-10-01), Manziek
patent: 4503196 (1985-03-01), Rempel
patent: 4581417 (1986-04-01), Buding
R. H. Grubbs et al., "Catalytic Reduction of Olefins with a Polymer-Supported Rhodium (I) Catalyst", Journal of the American Chemical Society, vol. 93 No. 12, Jun. 16, 1971, pp. 3062-3063.

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