Catalyst for preparing propylene by disproportionation of butene

A catalyst and disproportionation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, organic chemistry, etc., can solve low space velocity, low conversion rate of butene, low yield of propylene, etc. problem, to achieve good technical effect and the effect of increasing reaction space velocity

Active Publication Date: 2005-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problems of low space velocity, low butene conversion rate, low propylene selectivity and low propylene yield in the process of propylene disproportionation, which requires consumption of high value-added ethylene to obtain propylene, and butene disproportionation. Provide a new butene disproportionation to propylene catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the various steps, conditions and evaluation catalyst conditions of Comparative Example 1, only copper nitrate is added in the preparation of the catalyst, CuO accounts for 2.5% of the total weight of the catalyst after roasting, the reaction result is that the conversion rate of butene is 51.4%, and the selectivity of propylene is 72.6% %, the propylene yield is 37.3%.

Embodiment 2

[0028] According to the various steps, conditions and evaluation catalyst conditions of Comparative Example 1, only copper nitrate is added in the preparation of the catalyst, CuO accounts for 1.0% of the total weight of the catalyst after roasting, the reaction result is that the conversion rate of butene is 47.2%, and the selectivity of propylene is 64.0% %, the propylene yield is 30.2%.

Embodiment 3

[0030] Press each step, condition and evaluation catalyst condition of comparative example 1, just add copper nitrate and magnesium nitrate in catalyst preparation, CuO accounts for 2.0% of catalyst gross weight after roasting, and MgO accounts for 2% of catalyst gross weight, and the reaction result is butene The conversion rate of 50.6%, propylene selectivity is 69.7%, and propylene yield is 35.3%.

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PUM

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Abstract

The present invention relates to a catalyst for preparing propene by utilizing butene disproportionation. It is mainly aimed at solving the following problems of that previous technique has need of consuming ethylene with high additional value and in the process for preparing propene by means of butene disproportionation its space velocity is low, butene conversion rate is low, selectivity of propene is low and propene yield also is low. Said invention utilizes the technical scheme of adding copper or its oxide in the tungsten oxide/silicon dioxide catalytic system to better solve the said problems. Said invention can be used in industrial production for preparing propene by utilizing butene disproportionation.

Description

technical field [0001] The present invention relates to a catalyst for producing propylene by disproportionation of butene. Background technique [0002] At present, the demand growth of ethylene and propylene is different, and the demand growth of propylene is far greater than that of ethylene. However, the production ratio of ethylene and propylene is limited by the existing catalytic cracking technology. On the other hand, with the promotion of urban natural gas, there will be a certain surplus of C4 raw materials, and C4 raw materials contain a large amount of C4 olefins. The current disproportionation technology for producing propylene is mainly obtained by the disproportionation reaction of mixed butenes such as butene-1 and butene-2 ​​to generate propylene and pentene, or by consuming expensive ethylene. Therefore, the direct use of a single olefin to prepare propylene and the use of butene-1 or butene-2 ​​as raw materials to obtain hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C07C6/04C07C11/06
CPCY02P20/52
Inventor 李为王仰东陈庆龄谢在库杨为民
Owner CHINA PETROLEUM & CHEM CORP
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