Process for hydrotreating resins to lighten color

Details Process for hydrotreating resins to lighten color Process for hydrotreating resins to lighten color

1996-02-01

1998-10-06

Medley, Margaret

Chemistry of hydrocarbon compounds

Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...

585269, 585270, 585275, 585276, 528483, 528485, 528490, C08F 624

Patent

active

058179003

ABSTRACT:
The color of hydrocarbon resins having carbon-carbon double bonds and containing color bodies is lightened by a hydrotreating process consisting essentially of contacting the resin with hydrogen at a hydrogen pressure of 1 to about 20 bar (14.5 to about 290 psi) in the presence of a catalyst that promotes the hydrogenation of the color bodies without substantially changing the softening point or the content of carbon-carbon double bonds in the resin. The preferred catalyst is nickel/zinc oxide on SiO.sub.2.

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