Sulfur-containing palladium-carbon catalyst and method for preparing and using the same

摘要

A sulfur-containing palladium-carbon catalyst prepared by loading palladium on an active carbon, mixing the palladium-carbon catalyst with a solvent to form a slurry, adding a sulfide to the slurry to treat the loaded palladium under a predetermined temperature, and removing liquid and drying to obtain the catalyst. The sulfur-containing palladium-carbon catalyst is suitable for making phenylene diamine rubber antioxidant with improved productivity and selectivity.

主权项

1. A sulfur-containing palladium-carbon catalyst, comprising
active carbon, palladium loaded on the active carbon at a loading amount of about 0.5 to 10 wt % of the total weight of the catalyst, sulfidized palladium compounds prepared by partially passivating the palladium loaded on the active carbon by a sulfur-containing compound at a molar ratio of the sulfur-containing compound to the palladium of about 0.1:1 to 10:1, and the sulfur-containing compound selectively adsorbed on the surface of the catalyst, wherein the sulfur-containing compound is selected from the group consisting of a thiol, a thioether, an alkyl disulfide, thiofuran, ammonium hydrosulfide, a hydrosulfide of an alkaline metal, and a mixture thereof.