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Product separation process for preparing ethylbenzene and/or propylbenzene from gas containing ethylene and/or propylene

A technology for propylene gas and products, which is applied in the field of product separation technology for producing ethylbenzene and/or propylbenzene from ethylene and/or propylene gas, can solve the problems of influence of reaction, insufficient heat utilization, and high energy consumption, and achieves reduction of The effect of energy consumption, low energy consumption and reasonable calorie utilization

Inactive Publication Date: 2015-02-11
LUOYANG PETROCHEMICAL ENG CORP SINOPEC +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0025] The purpose of the present invention is to provide a kind of ethylbenzene and / or propylbenzene product separation process that contains ethylene and / or propylene gas, to solve the energy consumption existing in the prior art is high, heat utilization is not enough, and / or exists to reaction Disadvantages of impact

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  • Product separation process for preparing ethylbenzene and/or propylbenzene from gas containing ethylene and/or propylene
  • Product separation process for preparing ethylbenzene and/or propylbenzene from gas containing ethylene and/or propylene
  • Product separation process for preparing ethylbenzene and/or propylbenzene from gas containing ethylene and/or propylene

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Embodiment Construction

[0060] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, and the specific embodiments do not limit the scope of protection claimed by the present invention.

[0061] A specific embodiment of the present invention is as figure 1 As shown, the alkylation reaction product 7 and the anti-alkylation reaction product 8 enter the benzene tower 1 respectively, and the gaseous phase material 12 at the top of the benzene tower goes to the absorption tower, and is in reverse contact with the circulating absorbent 24 in the absorption tower, and the tower top material is the reaction tail gas 13 , the bottom material 14 of the absorption tower returns to the benzene tower 1; the liquid phase material 11 at the top of the benzene tower is extracted from the top of the tower, mixed with fresh benzene 9 to the reaction part 25, the bottom material 10 of the benzene tower enters the toluene tower 3, and the t...

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Abstract

The invention belongs to the field of petrochemical engineering, and discloses a separation process for preparing ethylbenzene and / or propylbenzene from gas containing ethylene and / or propylene. The product separation process comprises the following steps: 1) feeding alkylated product from an alkylation reactor and trans-alkylated product from a trans-alkylation reactor into a benzene tower in a respective mode or a mixed mode; 2) extracting separated benzene tower top gas phase material from the top of the benzene tower to be fed into an absorption tower, removing the reaction part through heat exchange; 3) extracting the separated benzene tower upper part liquid phase material from the benzene tower top or side, and then returning the reaction part; and 4) correspondingly separating multiple or all of methylbenzene, ethylbenzene, propylbenzene, diethylbenzene and high-boiling residue from benzene tower bottom material through a subsequent separation tower. The aim of reducing energy consumption is achieved without adding equipment, the flow is simple and the investment is low.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, in particular to a product separation process for producing ethylbenzene and / or propylbenzene from gas containing ethylene and / or propylene. Background technique [0002] Ethylbenzene is an important chemical raw material. Since the end of the 1930s, a variety of methods for producing ethylbenzene using ethylene and benzene as raw materials have been developed, but most of these methods use ethylene volume content greater than 99% polymer grade ethylene as raw material. With the development of petroleum processing scale, the refinery tail gas containing low concentration of ethylene and / or propylene is increasing day by day, and the utilization of ethylene and / or propylene in these tail gases has developed several kinds of low Concentrated ethylene and / or propylene gas is used as raw material to react with benzene to produce ethylbenzene and / or propylbenzene. These technologies mainly incl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C15/073C07C15/02C07C15/06C07C7/00
Inventor 李建保李淑红张仲利李春晓陈曦
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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