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Catalyst used for isobutene preparation

A catalyst, isobutene technology, applied in molecular sieve catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of low isobutane conversion rate, poor selectivity, poor catalyst activity and stability, etc., and reduce equipment investment. Effect

Inactive Publication Date: 2017-05-10
SHANDONG CHENGTAI CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The catalyst used in the existing isobutene preparation process has poor activity and stability, low conversion rate of isobutane and poor selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Embodiments, a catalyst for the preparation of isobutylene is composed of the following parts by weight: 7-10 parts of tin oxide, 5-10 parts of zinc oxide particles, 4-6 parts of basic aluminum sulfate, 4-10 parts of manganese oxide particles, 3 parts of tungsten oxide, 5-8 parts of coconut shell activated carbon, 4-8 parts of modified attapulgite, 4-8 parts of vanadium pentoxide, 4-6 parts of tungsten trioxide, 5-8 parts of alumina, amorphous silicon 4-8 parts of aluminum, 6-7 parts of molecular sieve.

[0034] The average particle diameter of the zinc oxide particles is 23nm, and the average particle diameter of the manganese oxide particles is 40nm.

[0035] The alumina is selected from pseudoboehmite, gibbsite, boehmite, gamma-alumina, alpha-alumina, delta-alumina, theta-alumina or mixtures thereof.

[0036] The molecular sieve is a mixture of ZSM-5, beta zeolite molecular sieve and MFI molecular sieve, and the mass ratio is 1-2:3-6:2-5.

[0037] The preparation m...

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Abstract

The invention discloses a catalyst used for isobutene preparation. The catalyst comprises the following raw materials in parts by weight: 7-10 parts of tin oxide, 5-10 parts of zinc oxide particles, 4-6 parts of alkaline aluminium sulphate, 4-10 parts of manganese oxide particles, 3 parts of tungsten oxide, 5-8 parts of coconut shell activated carbon, 4-8 parts of modified attapulgite, 4-8 parts of vanadium pentoxide, 4-6 parts of tungsten trioxide, 5-8 parts of aluminium oxide, 4-8 parts of amorphous silica-alumina, and 6-7 parts of a molecular sieve. By employing the technical scheme, the activity and stability are high, high activity is kept after continuous operation for 10000 hours, conversion rate of isobutene can reach 99.9%, isobutene selectivity is high, the purity of the prepared isobutene can reach as high as 99.9%, compared with a traditional production method, the energy consumption is reduced by 10-20%, and the equipment investment is reduced by 10-40%.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a catalyst for isobutene preparation. Background technique [0002] Isobutylene is an important raw material for fine chemicals. High-purity isobutylene is widely used as a monomer or intermediate in the production of butyl rubber and polyisobutylene, and can also be used to produce elastomers such as butyl rubber, isoprene rubber, and polyisoprene rubber. , can also be used to produce various fine chemicals. [0003] The development and utilization of isobutene downstream products, especially the mass production of MTBE, has led to a sharp increase in the demand for isobutene. The contradiction of the global shortage of isobutene resources has become increasingly prominent. Expanding the source of isobutene and increasing isobutene production have become an important issue in the development of global petrochemicals. [0004] The traditional production of isobutene is mainly e...

Claims

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Application Information

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IPC IPC(8): B01J29/80
CPCB01J29/48B01J29/78B01J29/7815B01J29/80B01J37/349
Inventor 张国华姬珂王纪伟
Owner SHANDONG CHENGTAI CHEM IND