Aromatic saturated hydrogenation catalyst and its preparing process

Abstract

The present invention relates to one kind of arene saturation hydrogenating metal nitride catalyst, which consists of gamma-Al2O3 carrier and supported bimetal Ni-Mo nitride. Of the active components, Ni accounts for 2.5-10 wt%, Mo accounts for 6-25 wt%, and Ni and Mo co-exist as Ni2Mo3N, Ni, Mo2N and small amount of oxides. The catalyst is prepared through the following steps: roasting gamma-Al2O3 powder at 500-550 deg.c for 4-5 hr; dissolving nickel acetate, ammonium molybdenum and HMT in the molar ratio of 14 to 3 to 17.2-27 in 13 % ammonia water solution to form immersion solution; soaking the gamma-Al2O3 powder in the solution via stirring for 2-4 hr, filtering, air drying, vacuum drying at 60-100 deg.c for 5-8 hr, tabletting and sieving; roasting first in Ar flow to 650-680 deg.c for 2 hr and then in H2 flow for 2 hr, and cooling to room temperature in H2; and final deactivating in N2 containing O2 in 1 % for 4 hr. It has high catalytic activity and other features.

Description

technical field [0001] The invention relates to a metal nitride catalyst used in the saturated hydrogenation of aromatic hydrocarbons, in particular to a supported double transition metal nitride catalyst and a preparation method thereof. Background technique [0002] Transition metal nitrides are a class of compounds formed by nitrogen atoms interstitially integrated into transition metal lattices. They have unique physical and chemical properties, especially because of their catalytic activity similar to noble metals. Recent studies have shown that the introduction of the second metal can greatly improve the catalytic activity of nitrides, especially the bimetallic nitrides obtained after the introduction of Ni, have excellent performance in hydrodenitrogenation, hydrodesulfurization and saturated hydrogenation of aromatics , showing good application prospects in oil hydrotreating. Usually, bimetallic nitride catalysts are prepared by temperature-programmed nitriding of o...

AI Technical Summary

Problems solved by technology

Among the commonly used oil hydrotreating catalysts, traditional sulfide catalysts are difficult to achieve deep aromatic saturation due to thermodynamic limitations; while noble metal catalysts with excellent hydrogenation performance are limited by factors such as high price and easy poisoning. Wide application in industry