The catalytic converter for hydrogenation refinement treatment, being hydrogenation refinement treatment manner and the catalytic converter for production mannered

摘要

The catalyst for hydrogenation and purification includes at least one hydrogenation active metal element selected from the group 6, group 8, group 9 and group 10 elements selected from the periodic table group 6 to 25% by weight and from 0.1 to 3% by weight to the carrier made of porous inorganic oxide. The concentration of the hydrogenated active metal element is higher in the center region than the outer periphery of the catalyst, and the concentration of potassium is higher in the outer periphery than the central portion of the catalyst. By the metal content of the hetero compound, the hetero compound can be effectively diffused into the catalyst without blocking the pores of the outer surface of the catalyst. Thus, the high active state can be maintained for a long period of time.