Mixed carbon four-component selective hydrogenation catalyst and preparation method

Abstract

The invention discloses a mixed carbon four-component selective hydrogenation catalyst and a preparation method thereof. The mixed carbon four-component selective hydrogenation catalyst is composed of an active component and a support carrier, the active component is palladium and manganese, and the support carrier is γAl 2 o 3 , CeO 2 -ZrO 2 and attapulgite; palladium accounts for 0.08% to 1.5% of the mass of the support carrier, manganese accounts for 3 to 5% of the mass of the support carrier, γAl 2 o 3 , CeO 2 -ZrO 2 , The mass ratio of attapulgite is 50~60:30~40:10~20. The specific surface area of ​​the support carrier is 120~180m 2 / g, effectively taking into account the catalyst activity and selectivity, the active component Pd interacts with Mn, which is conducive to improving the removal depth of butadiene, carbon tetraacetylene, vinyl acetylene and increasing the yield of monobutene. It does not need to be activated before use, has high mechanical strength and is not easy to pulverize, has the advantages of convenient use and long service life, and can be widely used in 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.