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Production device and production process of p-xylene

A p-xylene and xylene technology, applied in the field of p-xylene production equipment, can solve problems such as unreasonable energy utilization

Active Publication Date: 2020-03-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the isomerization product is completely cooled after exchanging heat with the feed, and reheated after the hydrogen is separated, so there is an unreasonable phenomenon of energy utilization.

Method used

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  • Production device and production process of p-xylene
  • Production device and production process of p-xylene
  • Production device and production process of p-xylene

Examples

Experimental program
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Effect test

Embodiment 1

[0067] Embodiment 1 illustrates the method and energy consumption of the novel p-xylene production process provided by the present invention, wherein the overhead product of the isomerization fractionation tower directly leaves the device without separation, and the hydrogen required for the isomerization reaction is boosted by a compressor , mixed with the isomerization reaction feed. The energy consumption of the device is shown in Table 1.

[0068] Table 1

[0069] Example Comparative example 1 Example 1 process flow routine process Process of the invention Condensing cooling load / MW 109.2 88.2 Reboiler load / MW 97.3 79.8

[0070] As can be seen from Table 1, compared with Comparative Example 1, the energy consumption of the method for producing p-xylene provided by the present invention is reduced by 18.2%. Therefore, adopting the novel p-xylene production method provided by the present invention can reduce the operating load of th...

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Abstract

The invention discloses a production device and a production process of p-xylene. The device comprises a xylene fractionation unit, an adsorption separation unit and an isomerization reaction unit, wherein the adsorption separation unit comprises an adsorption separation tower, an extraction liquid tower, a raffinate tower, a finished product tower, a finished product tower reboiler I and a finished product tower reboiler II, and the isomerization reaction unit comprises an isomerization reactor, an isomerization product fractionating tower, a white clay tower, an isomerization reaction heating furnace, a heat exchanger II, a heat exchanger III, a heat exchanger IV, a heat exchanger VI and a compressor. According to the process, the operation load of the xylene tower is reduced, the fuel gas consumption of the xylene reboiler is reduced, meanwhile, the heat exchange network is optimized, the fuel gas consumption of the isomerization reaction heating furnace is reduced, the energy consumption is greatly reduced, and the economic benefit and the social benefit are improved.

Description

technical field [0001] The invention relates to a production device and process of p-xylene. Background technique [0002] P-xylene is one of the important basic organic raw materials in the petrochemical industry. It is mainly used to produce terephthalic acid (PTA) and dimethyl terephthalate (DMT). It is widely used in chemical fibers, synthetic resins, pesticides, and medicines. , plastics and other production areas. In 2017, the apparent consumption of p-xylene in my country will reach 2400×10 4 t, the production capacity of p-xylene unit reaches 816×10 4 t, accounting for about 20% of global production capacity, my country is already the world's largest producer of p-xylene. [0003] C 8 Aromatics include o-xylene, p-xylene, m-xylene and ethylbenzene four isomers, among which p-xylene has the largest market, so the industry usually prefers to increase the specific C 8 The production of para-xylene from aromatics feedstock sources even maximizes it. Due to their si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/00C07C7/04C07C5/27C07C15/08
CPCC07C7/005C07C7/04C07C5/27C07C15/08Y02P20/50
Inventor 胡珺薄德臣高明张英
Owner CHINA PETROLEUM & CHEM CORP
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