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.
CN103083935BActive Publication Date: 2014-12-31CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2014-12-31

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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