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Apparatus and method for continuously separating and purifying durene

A technology of mesitylene and purification section is applied in the field of devices for continuous separation of mesitylene, which can solve the problems of high energy consumption and low continuous production capacity, and achieve the effects of reducing energy consumption, saving equipment and shortening the purification process.

Active Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This production method also generally has the disadvantages of high energy consumption and low continuous production capacity.

Method used

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  • Apparatus and method for continuously separating and purifying durene
  • Apparatus and method for continuously separating and purifying durene
  • Apparatus and method for continuously separating and purifying durene

Examples

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Embodiment

[0043] Such as figure 1 Shown, a device for continuous separation and purification of durene.

[0044] The device includes a vertical tower body and a horizontal tower body, and a rotating scraper is arranged in the vertical tower body and the horizontal tower body;

[0045] There is a constant temperature feed inlet on the outside of the vertical tower body. The vertical tower body includes from top to bottom: raffinate recovery section a and crystal purification section b. Above the constant temperature feed inlet of the vertical tower body is the raffinate recovery section. a, below the constant temperature feeding port is the crystal purification section b;

[0046] The horizontal tower body includes a crystal collection section c and a molten crystal reflux section d; the position of the rotary scraper in the horizontal tower body is the crystal collection section c, and the horizontal tower body without the rotary scraper is the molten crystal reflux section d;

[004...

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Abstract

The present invention discloses an apparatus and a method for continuously separating and purifying durene. The apparatus comprises: a vertical tower body and a horizontal tower body, wherein rotation scrapers are respectively arranged inside the vertical tower body and the horizontal tower body, the outer side of the vertical tower body is provided with a constant temperature material inlet, the vertical tower body is sequentially provided with a residue liquid recovery section and a crystal purification section from top to bottom, the horizontal tower body comprises a crystal collection section and a melting crystal reflux section, the melting crystal reflux section comprise a constant temperature melting crystal collection tank, a reflux pump and a heater, and the melting crystal reflux section is connected with the crystal purification section through a reflux port. The method comprises that: a durene raw material continuously enters the apparatus, and is sequentially subjected to countercurrent washing, re-crystallization and purification separation to obtain the pure durene. With the apparatus and the method, continuous material feeding, continuous high purity durene crystal extraction and continuous residue liquid recovery can be achieved.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a device and method for continuously separating durene. Background technique [0002] Our country is rich in reorganization C 9 + Resources, Annual Production Restructuring C 9 + Aromatics can reach more than 600kt. Durene at C 9 + Aromatics account for about 8%, which is a very important fine chemical raw material, mainly used in the production of pyromellitic dianhydride (PMDA, referred to as homoanhydride), and then the production of polyimide resin. C 9 + Different brands of solvent oils are separated from the raw materials through a rectification tower, and a durene-enriched liquid is obtained at the same time, and then the durene-enriched liquid is crystallized and refined to obtain a durene product. At present, the main technologies for producing durene are: crystallization separation method of carbon decathylene, methylation method of trimethylbenzene methan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D9/02C07C15/02C07C7/14
Inventor 冯海强朱跃辉高继东赵开径鲁耘
Owner CHINA PETROLEUM & CHEM CORP
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