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C8 aromatic hydrocarbon separation and conversion process and system

An aromatic hydrocarbon and process technology, which is applied in the field of C8 aromatic hydrocarbon separation and conversion processes and systems, can solve the problems of fast deactivation of white clay, poor adsorption efficiency, and frequent replacement of the environment for waste white clay.

Active Publication Date: 2021-04-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention optimizes the heat exchange network, greatly reduces energy consumption, and at the same time solves the problems of rapid deactivation of white clay, poor adsorption efficiency due to limited adsorption capacity, frequent replacement of waste white clay and pollution to the environment, etc., and improves social and economic benefits

Method used

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  • C8 aromatic hydrocarbon separation and conversion process and system
  • C8 aromatic hydrocarbon separation and conversion process and system
  • C8 aromatic hydrocarbon separation and conversion process and system

Examples

Experimental program
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Effect test

Embodiment 1

[0061] C of the present invention 8 The aromatics separation and conversion process and equipment used in the system are shown in Table 2, and the operating parameters and energy consumption of the device are shown in Table 3.

[0062] Table 2

[0063]

[0064] table 3

[0065]

[0066] As can be seen from Table 1 and Table 2, compared with Comparative Example 1, C provided by the present invention 8 The aromatics separation and conversion process can save equipment investment, reduce the investment of one set of rectification tower, cooler reboiler equipment and one gas-liquid separation tank, air cooler and water cooler, add one reactor, and cancel the clay tower . Adopting the method provided by the invention not only reduces the number of equipment, but also reduces energy consumption by 19.9%. Therefore, equipment investment and floor space are reduced, the operating load of the xylene tower is reduced, and the fuel gas consumption of the xylene reboiler is save...

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Abstract

The invention discloses a C8 aromatic hydrocarbon separation and conversion process and system. The process comprises the following steps: enabling a C8 aromatic hydrocarbon raw material to enter a xylene tower for fractionation, sending a tower top material flow to an adsorption separation tower through heat exchange, making an obtained p-xylene-rich extract liquid enter an extract liquid fractionating tower through a heat exchanger, letting p-xylene-poor raffinate enter a raffinate tower, and subjecting an upper side material to heat exchange, performing heating by an isomerization reaction heating furnace, carrying out isomerization reaction, carrying out heat exchange on the reaction product, removing olefin in a hydrogenation reactor, and introducing the reaction product into an isomerization product fractionating tower which is in the form of a dividing wall tower; wherein tower top materials are C7 or below light hydrocarbon and hydrogen, side line materials are mixed with adsorption separation feed, and the tower bottom discharged material is C9<+> aromatic hydrocarbon. Directed at the defects of the prior art, a heat exchange network is optimized, the energy consumption is greatly reduced, meanwhile, the problems of poor adsorption efficiency, frequent replacement of spent bleaching clay, environmental pollution and the like caused by quick deactivation of the bleaching clay and limited adsorption capacity are solved, and the social and economic benefits are improved.

Description

technical field [0001] The present invention relates to a C 8 Aromatics separation and conversion process and system. Background technique [0002] The industry generally adopts the adsorption separation method to obtain high-purity p-xylene products, and the raw material C for producing xylene products is 8 Aromatics include four isomers of o-xylene, p-xylene, m-xylene and ethylbenzene. Using the difference in selectivity of the adsorbent for the four isomers, the p-xylene-rich component and the depleted component are separated. Paraxylene component. The rich p-xylene is used as the feed of the extract liquid tower, and the components can be obtained through a series of rectification processes to obtain p-xylene products, and the lean p-xylene is used as the feed of the raffinate, and the components are converted into equilibrium concentration of C by isomerization reaction. 8 Aromatics mixture returns to the xylene tower for fractional distillation. In this process, th...

Claims

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Application Information

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IPC IPC(8): C07C7/00C07C7/04C07C5/27C10G67/14C07C15/08
CPCC07C7/005C07C7/04C07C5/2775C07C5/2791C10G67/14C10G2300/1096C07C15/08Y02P20/50
Inventor 胡珺高明薄德臣张英
Owner CHINA PETROLEUM & CHEM CORP
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