Method for Preparing Noble Metal Hydrogenation Catalyst, Noble Metal Hydrogenation Catalyst and Use Thereof

摘要

Disclosed are a method for preparing a noble metal hydrogenation catalyst comprising preparing a carrier from a molecular sieve having a 10-member ring structure and/or an amorphous porous material; preparing a noble metal impregnation solution from one or more of compounds of noble metals Pt, Pd, Ru, Rh, Re, and Ir and deionized water or an acid solution; and preparing noble metal impregnation solutions in a concentration gradient ranging from 0.05 to 5.0 wt % with deionized water, and sequentially impregnating the carrier with the impregnation solutions from low to high concentrations during the carrier impregnation process, or preparing a noble metal impregnation solution at a low concentration ranging from 0.05 to 0.5 wt % and impregnating the carrier by gradually increasing the concentration of the noble metal impregnation solution to 2.0 to 5.0 wt % in the impregnation process, followed by homogenization, drying, and calcination, as well as a noble metal hydrogenation catalyst, use thereof, and a method for preparing lubricant base oil. The catalyst according to the present invention has high activity and stability, and the produced lubricant base oil shows a high viscosity index and a low pour point.

主权项

1. A method for preparing a noble metal hydrogenation catalyst, characterized in that said method comprises:
step 1: preparing a carrier from a molecular sieve having a 10-member ring structure and/or an amorphous porous material, wherein the molecular sieve having a 10-member ring structure is selected from one or more of ZSM-5, SAPO-11, EU-1, ITQ-13, ZSM-22, MCM-22, NU-87, and ZSM-23, the mass fraction of the amorphous porous material contained in the carrier is 10 to 90 wt %, and the mass faction of the molecular sieve having a 10-member ring structure contained therein is 5 to 80 wt %; step 2: preparing a noble metal impregnation solution from one or more of compounds of noble metals Pt, Pd, Ru, Rh, Re, and Ir and deionized water or an acid solution, wherein the concentration of the noble metal impregnation solution is 0.1 to 5.0 wt %, and preparing a hydrogenation catalyst having a noble metal mass fraction of 0.05 to 2.0 wt % by incipient impregnation; and step 3: preparing noble metal impregnation solutions in a concentration gradient ranging from 0.05 to 5.0 wt % with deionized water, and sequentially impregnating the carrier with the impregnation solutions from low to high concentrations during the carrier impregnation process, or preparing a noble metal impregnation solution at a low concentration ranging from 0.05 to 0.5 wt % and impregnating the carrier by gradually increasing the concentration of the noble metal impregnation solution to 2.0 to 5.0 wt % in the impregnation process, followed by homogenization for 10 minutes to 3 hours, drying at 90 to 140° C. for 3 to 10 h, and calcination at 450 to 600° C. for 3 to 10 h.