关键词: 石蜡; 微晶蜡; 加氢; 精制催化剂; 食品级

Abstract: Paraffin hydrofining catalyst of the SD series is developed to adapt the inferior tendency of paraffin feedstocks and meet the requirements on a better product quality and expansion of units. To solve the problems of high impurity content and strong diffusion resistance of paraffin and microcrystalline wax, the improved carrier preparation process was adopted to make the carrier have large pore volume, strong impurity-containing capacity and better feedstock adaptability by means of special high-temperature modification treatment. With W-Ni used as active components, the catalyst displayed excellent HDS, HDN and aromatics saturation performances. This catalyst was mainly used for hydrotreatment of the 54# -68# paraffin and 70# -75# microcrystalline wax. The products can be in line with the latest national and international specifications on quality. The paraffin and microcrystalline wax products from the high-pressure hydrogenation process can meet the requirements American FDA food - graded specifications on paraffin products. The catalyst has come under industrialized application for a dozen of times, creating good economic benefits for paraffin production enterprises.

Key words: paraffin, microcrystalline wax, hydrogenation, fined catalyst, food grade