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Method and device for separating 1, 2, 3-trimethylbenzene

A technology for the separation of trimethylbenzene and its separation method, which is applied in the field of separation method and device of trimethylbenzene, and can solve the problems of high energy consumption, large energy consumption, and large reflux ratio of the production process, etc.

Inactive Publication Date: 2005-01-26
TIANJIN TIANDA TIANJIU TECH CO LTD
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Problems solved by technology

Since the two towers are both operated under normal pressure, the boiling points of the components are relatively close, so a large number of key components with similar calorific values ​​are heated on the one hand and cooled on the other hand, which requires a large reflux ratio and a large number of components during operation. Only a high number of theoretical plates can meet the requirement of separation, so the separation of trimethylbenzene products needs to consume a lot of energy, so that the energy consumption of this production process remains high

Method used

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  • Method and device for separating 1, 2, 3-trimethylbenzene

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Embodiment 1

[0008] Embodiment 1: A kind of method and device for separating trimethylbenzene, comprising light removal tower 1, product tower 2, preheater 3, feed pump 4, condenser 7, etc., raw material enters light removal tower 1 through preheater 3 , the top tank 6 of the light removal tower 1 is connected to the vacuum system 20, so that the inside of the light removal tower 1 is negative pressure,

[0009] The device of the present invention is mainly composed of a light removal tower 1, a product tower 2, a preheater 3, a feed pump 4, a condenser 7, a reflux tank 6, a vacuum system 20, and a bottom reboiler 5. One end of the condenser 7 is connected to the gas phase outlet 17 , and the other end is connected to the reflux tank 6 , and the reflux tank 6 is connected to the vacuum system 20 . The light removal tower 1 is divided into two parts, the upper part is the rectification section, and the lower part is the stripping section; each part is composed of several trays or packing of...

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Abstract

The invention discloses a method and device for separating 1,2,3-trimethylbenzene, wherein the light removing tower employs negative pressure operation, while the product tower employs pressurization operation, the gaseous phase exhaust port on the top of the product tower is connected with the re-boiling device on the bottom of the light removing tower.

Description

Technical field [0001] The invention belongs to the technical field of separation of fine chemical industry, and in particular relates to a separation method and device of metatrimethylbenzene. Background technique [0002] At present, the fine chemical industry is developing rapidly. Using the existing products of petrochemical enterprises for further deep processing is the best way to increase the added value of products and improve the economic benefits of enterprises. Petroleum heavy aromatics come from petroleum aromatics products obtained by catalytic processing or thermal processing. 9 The general term for the above monocyclic, bicyclic or polycyclic aromatic hydrocarbons. It is a valuable raw material for the production of fine chemicals. Further separation of heavy aromatics can obtain various C8, C9 and C10 aromatics with high purity, and these heavy aromatics can be further processed to obtain various downstream products. [0003] Among petroleum heavy aromatic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/04C07C15/00
Inventor 朱怀工张敏卿王丰王志明
Owner TIANJIN TIANDA TIANJIU TECH CO LTD
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