Polymer hydrogenation process

Details Polymer hydrogenation process Polymer hydrogenation process

C - Chemistry, Metallurgy

08

F

402/448

C08F 8/04 (2006.01) B01J 31/20 (2006.01) B01J 31/24 (2006.01) C08C 19/02 (2006.01)

Patent

CA 2015804

Selective hydrogenation of the carbon-carbon double bonds of conjugated diene copolymers is effected in homogeneous solution in an organic solvent in the presence of certain divalent ruthenium carbonyl complex catalysts containing phosphine ligands having bulky alkyl substituents. The ruthenium catalysts have the general formula: RuXY(CO)ZL2 -(1) or RuX(NO)(CO)L2 -(2) wherein X is a halogen atom, most preferably chlorine, or a carboxylate group, Y is a halogen atom, more preferably chlorine, a hydrogen atom, a phenyl group, a carboxylate group or phenylvinyl group, Z is carbonyl, pyridine, benzonitrile, trimethylphosphite or no ligand and L is a phosphine ligand having at least one bulky alkyl substituent, preferably tricyclohexyl or tri- isopropyl.

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