Preparation process of cyclohexane synthesis catalyst

Abstract

The invention discloses a preparation process of a cyclohexane synthesis catalyst. The preparation process comprises the following steps: firstly, modifying the surface of an alumina carrier with a macroporous structure by utilizing tin and potassium; meanwhile, putting aluminum silicate fiber felt adopted as a matrix into nano silicon dioxide aerogel slurry for dipping, then drying the felt, connecting heat-resistant layers to two sides of the felt, then dipping the product into the nano silicon dioxide aerogel slurry again, and drying to obtain an aluminum silicate fiber refractory sleeve; sleeving the catalyst carrier with the aluminum silicate fiber refractory sleeve; and performing calcination in an electric heating type roller kiln with rapid heating and cooling circulation. According to the process, the catalyst carrier is creatively coated with the aluminum silicate fiber refractory sleeve before calcination and cracks of the catalyst in circulated rapid heating and cooling extreme calcination environments are effectively prevented; tin and potassium are utilized to modify the surface of the alumina carrier with a macroporous structure, so that more active site loading centers are generated on the surface of the carrier, and the activity of the catalyst is effectively improved.

Description

technical field [0001] The invention relates to the technical field of hydrogenation catalyst preparation, in particular to a preparation process of a cyclohexane synthesis catalyst. Background technique [0002] Cyclohexane is an important organic chemical raw material. Cyclohexane is colorless, easy to flow, and has a pungent smell. It is the main raw material for the production of nylon products. At the same time, cyclohexane is an excellent solvent for cellulose ether, resin, wax, asphalt and rubber. 90% of cyclohexane is produced by hydrogenation of benzene. [0003] Domestic benzene hydrogenation production units mostly use nickel-based catalysts and platinum-based catalysts. Nickel-based catalysts are the main production method in China, and platinum-based catalysts are widely used abroad. Because Pt-based benzene hydrogenation catalysts have many advantages over nickel-based catalysts: good sulfur resistance, easy regeneration after poisoning, good heat resistance,...

AI Technical Summary

Problems solved by technology

This calcination method makes the water loss rate of the outer skin and the inner part of the carrier inconsistent, resulting in a large temperature difference between the inner and outer parts of the carrier.