Mixed butane component selective hydrogenation catalyst and preparation method

Abstract

The invention discloses a mixed butane component selective hydrogenation catalyst and a preparation method. The mixed butane component selective hydrogenation catalyst comprises active components anda supporting carrier, wherein the active components are palladium and manganese, and the supporting carrier is a mixture of gammaAl2O3, CeO2-ZrO2 and attapulgite; the palladium accounts for 0.08-1.5%of the supporting carrier; the manganese accounts for 3-5% of the supporting carrier; and the mass ratio of the gammaAl2O3 to the CeO2-ZrO2 to the attapulgite is (50-60):(30-40):(10-20). The specificsurface area of the supporting carrier is 120-180 m<2> / g; the activity and selectivity of the catalyst are effectively taken into account; and the active ingredients Pd and Mn mutually act, so that the removal depth of butadiene, butane alkyne and vinyl acetylene is favorably improved and the yield of single butene is improved. Before the mixed butane component selective hydrogenation catalyst isused, activation is not required; the mechanical strength is high; and dusting is unlikely to happen. The mixed butane component selective hydrogenation catalyst has the advantages of convenience in use, long service life and the like and can be widely applied to large-scale industrial production.

Description

technical field [0001] The invention relates to a catalyst and a preparation method, in particular to a mixed carbon four-component selective hydrogenation catalyst capable of effectively increasing the yield of monobutene and a preparation method. Background technique [0002] Mixed carbon four is the general term for alkanes, monoolefins and diolefins, mainly derived from the torch gas containing vinyl acetylene produced by petroleum olefin cracking, coal chemical industry and carbon four extraction devices. Petroleum olefin cracking units mainly produce ethylene, and co-produce propylene and C4 fraction at the same time. The C4 fraction mainly produces MTBE and monobutene; coal chemical industry uses coal to produce methanol, and methanol produces olefins, ethylene and propylene, and at the same time produces some carbon Four products, its carbon four is used to produce products such as MTBE, monobutene and 2PH; while most of the torch gas containing vinyl acetylene is ev...

AI Technical Summary

Problems solved by technology

Palladium system catalysts have the characteristics of low operating temperature and few side reactions, but there are problems such as insufficient removal depth of carbon tetraynes, dienes, and vinyl acetylene, and large loss of monobutene and low yield.