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Comprehensive utilization method of mixed C4-C5 material

A technology for mixing C4 and materials, which is applied in the direction of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve the problem of low comprehensive utilization rate of mixed C4 and C5 materials, and achieve the effect of increasing added value

Pending Publication Date: 2022-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Based on the low comprehensive utilization rate of mixed C4C5 materials in the prior art, this application provides a method for comprehensive utilization of mixed C4C5 materials, including:

Method used

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  • Comprehensive utilization method of mixed C4-C5 material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The mixed C4C5 material composition (volume fraction %) of the steam cracking unit after extracting the olefin fraction is: isobutane: 27.0, n-butane: 25.8, butadiene: 1.2, isobutene: 1.8, butene-1: 42.4, butene-2: 1.8, isopentane: 12., n-pentane: 16, 1-pentene: 4.0, 2-pentene: 4.8, isopentene: 3.2.

[0050] Among them, in the selective hydrogenation unit, the selective hydrogenation catalyst is alumina-supported metal nickel, using a tubular fixed-bed reactor, the reaction temperature is 60 ° C, the reaction pressure is 2.5 MPa, and the reaction obtains stream I;

[0051] The stream I was transported to the dehydrogenation unit, and the dehydrogenation of alkanes was carried out in a fluidized bed reactor. The catalyst was metal platinum and tin supported on alumina, the reaction temperature was 560°C, and the reaction pressure was 0.3 MPa. After 1 hour of reaction, stream II was obtained. The composition of stream II is tested;

[0052] The stream II is transported t...

Embodiment 2

[0057] The mixed C4C5 material composition (volume fraction %) of the steam cracking unit after extracting the olefin fraction is: isobutane: 30, n-butane: 50, butadiene: 4, isobutene: 6, butene-1: 7. Butene-2:3.

[0058] Among them, in the selective hydrogenation unit, the selected hydrogenation catalyst is palladium supported on alumina, using a tubular fixed bed reactor, the reaction temperature is 50°C, and the reaction pressure is 3.0MPa to obtain stream I, and the composition of stream I is tested ;

[0059] The stream Ⅰ is transported to the dehydrogenation unit, and the alkane dehydrogenation adopts a tubular fixed-bed reactor, the catalyst is aluminum oxide supported metal platinum and tin, the reaction temperature is 560°C, and the reaction pressure is 0.2MPa, and the stream Ⅱ is obtained, and the stream Ⅱ The composition of the test;

[0060] The stream II is sent to the isomerization unit, and the isomerization of normal olefins adopts a single-stage fixed-bed re...

Embodiment 3

[0065] The mixed C4C5 material composition (volume fraction %) of the steam cracking unit after extracting the olefin fraction is: isobutane: 34, n-butane: 50, butadiene: 1, isobutene: 10, butene-1: 3. Butene-2:2.

[0066] Among them, in the selective hydrogenation unit, the selective hydrogenation catalyst is aluminum oxide supported metal nickel, using a tubular fixed bed reactor, the reaction temperature is 65°C, and the reaction pressure is 2.8MPa to obtain stream I, and the composition of stream I is analyzed. test;

[0067] The stream I is transported to the dehydrogenation unit, and the alkane dehydrogenation adopts a tubular fixed-bed reactor, the catalyst is aluminum oxide supported metal platinum and tin, the reaction temperature is 550°C, and the reaction pressure is 0.2MPa, and the stream II is obtained. Composition for testing;

[0068] The stream II is transported to the isomerization unit. The isomerization of normal olefins adopts a single-stage fixed-bed rea...

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Abstract

The invention relates to a comprehensive utilization method of a mixed C4 and C5 material, compared with a traditional comprehensive utilization process of mixed hydrocarbon, the comprehensive utilization method provided by the invention can be used for dehydrogenation treatment of the mixed material containing C4 and C5 alkanes, components with high added values in the mixed C4 and C5 material are fully utilized, and the utilization rate of the mixed C4 and C5 material is improved. The methyl tert-butyl ether and the methyl tert-amyl ether with higher chemical additional values are directly obtained, and a better cracking furnace cracking raw material and another important chemical raw material propylene are also obtained. Therefore, each component of the mixed C4-C5 material is utilized, and the additional value of the mixed C4-C5 material is greatly improved.

Description

technical field [0001] The invention relates to the field of petrochemical industry, and further relates to a method for comprehensive utilization of mixed C4C5 materials. Background technique [0002] C4 and C5 materials are one of the main by-products of steam cracking unit, catalytic cracking unit and C4 deep processing process, among them, the C4 fraction and C5 fraction generated in the process of steam cracking to ethylene are about 15% of the ethylene production. % and 35%. Due to their low boiling points, C4 and C5 fractions are easy to gasify under normal pressure, and C4 and C5 by-products contain monoolefins, dienes and alkynes. After extraction of hydrocarbons such as dienes, alkynes, etc. Unsaturated hydrocarbons and impurities are enriched and easily aggregated into colloids, which brings difficulties to the application, so that such resources are not rationally utilized, and a considerable part of them is burned as fuel. With the continuous increase of ethyl...

Claims

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Application Information

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IPC IPC(8): C07C11/08C07C5/05C07C5/333C07C5/25C07C43/04C07C41/06
CPCC07C5/05C07C5/333C07C5/2518C07C41/06C07C11/08C07C43/04
Inventor 纪玉国季静杜周张富春任玉梅
Owner CHINA PETROLEUM & CHEM CORP
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