A kind of alkyne selective hydrogenation catalyst and its preparation method and application

A hydrogenation catalyst and selective technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of reducing catalyst activity, selectivity and stability, There are many side reactions, poor hydrogenation activity stability and other problems, so as to improve the hydrogenation selectivity and operation stability, the preparation method is simple and easy to operate, and the operation stability is excellent.
CN108927173BActive Publication Date: 2021-11-23沈阳沈科姆科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
沈阳沈科姆科技有限公司
Publication Date
2021-11-23

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Abstract

The invention belongs to the technical field of petrochemical industry, and in particular relates to an alkyne hydrogenation selective catalyst and its preparation method and application. The catalyst is composed of an active component, a catalytic promoter and a carrier. The active component is palladium, and a catalytic promoter is added to improve the hydrogenation stability and selectivity of the catalyst. The catalytic promoter is introduced into the catalyst in different ways In this process, the acidity of the catalyst surface can be reasonably controlled and the dispersion of the active component palladium can be promoted to form more active sites. The catalyst of the present invention is suitable for the selective hydrogenation of alkyne-containing materials, especially for the selective hydrogenation of carbon four materials with high alkyne content discharged from a butadiene extraction device, to convert vinyl acetylene and ethyl acetylene into butadiene Diene and butene, hydrogenation products are returned to the raw material storage tank or butadiene extraction unit to recover butadiene and butene. The catalyst of the invention has mild hydrogenation reaction conditions, high activity and selectivity, especially good stability and long operation period, and is suitable for hydrogenation of materials with high alkyne content.
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Description

technical field

[0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to an alkyne hydrogenation selective catalyst and its preparation method and application. Background technique

[0002] Butadiene is an important petrochemical basic organic raw material and synthetic rubber monomer. It is one of the most important components in the C4 fraction, and its position in petrochemical olefin raw materials is second only to ethylene and propylene. The main source of butadiene is the mixed carbon four produced by the ethylene plant as raw material, which is separated by solvent extraction. The mixed carbon four fraction produced by ethylene plant usually contains 40wt%~60wt% butadiene, 0.5wt%~2.0wt% alkyne, mainly including methylacetylene (MA), ethylacetylene (EA) and vinyl Acetylene (VA), others butanes (n-butane and isobutane) and butenes (n-butene, isobutene, trans-butene-2 ​​and cis-butene-2).

[0003] At present, acetonitr...

Claims

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