Alkyne selective hydrogenation catalyst carrier and preparation method and catalyst thereof

Abstract

The invention discloses an alkyne selective hydrogenation catalyst carrier and a preparation method thereof; the hydrogenation catalyst carrier is obtained by well mixing and compounding alumina with one or two of SiC and talcum, and a catalyst containing an active ingredient of palladium is prepared. The catalyst can also contain co-catalytic ingredients of Ag, Mn, Bi, Mo, W, Cu, Zn, alkali metal, alkaline earth metal, and rare earth elements. The catalyst carrier has low raw material cost, and the obtained catalyst has high selective hydrogenation activity and good selectivity.

Description

technical field [0001] The invention relates to a catalyst carrier and a catalyst, more specifically, the invention relates to a composite carrier for an alkyne selective hydrogenation catalyst and a preparation method, and the catalyst is prepared using the carrier as a carrier. Background technique [0002] In petrochemical production, the cracked gas produced from the cracking of liquid hydrocarbons usually contains impurities that affect its further processing. The ethylene fraction in the cracking and separation section contains 0.3-2.5% acetylene. This acetylene impurity can poison and deactivate the catalyst in the ethylene polymerization process, affecting the normal progress of the ethylene polymerization reaction. In order to avoid the above-mentioned catalyst poisoning phenomenon, the content of acetylene in the polymerization grade ethylene raw material gas is required to be less than 0.1ppm. In the industry, catalytic selective hydrogenation is often used to re...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of the poor heat transfer performance of the existing catalyst carrier and the loss of active components caused by the easy wear and tear of the catalyst carrier, the inventor has carefully studied and developed a new method for preparing a composite carrier for the selective hydrogenation of alkynes. The preparation method is simple, the wear loss of the obtained carrier is low, the price of raw materials is cheap, and the prepared catalyst has high activity and good selectivity