Polymer hydrogenation catalysts

Details Polymer hydrogenation catalysts Polymer hydrogenation catalysts

C - Chemistry, Metallurgy

07

B

402/387, 252/63.

C07B 35/02 (2006.01) B01J 23/00 (2006.01) B01J 23/38 (2006.01) B01J 23/40 (2006.01) B01J 35/10 (2006.01) C08C 19/02 (2006.01) C08F 8/04 (2006.01)

Patent

CA 2007317

The hydrogenation of unsaturated polymers is effected employing a heterogeneous catalyst comprising a Group VIII metal and a porous support wherein the porous support is characterized by a pore size distribution such that at least 95 percent of the pore volume is defined by pores having diameters greater than 450 .ANG. (45 nm) and the ratio of metal surface area to carrier surface area is in the range of from 0.07 to 0.75:1. The catalyst is useful in selective polymer hydrogenations, such as are required in hydrogenating ethylenically unsaturated regions with a minimal amount of aromatic unsaturation hydrogenation. The catalyst is very active under mild temperature conditions, from room temperature to 140°C.

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