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Method for extracting dicyclopentadiene and light benzene from byproduct primary distiller of coal-coking crude benzene

A technology of dicyclopentadiene and coal coking, applied in chemical instruments and methods, hydrocarbons, organic chemistry, etc., can solve problems such as high production cost and complex process

Inactive Publication Date: 2008-07-23
山东玉皇盛世化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has the characteristics of complex process and high production cost

Method used

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Embodiment Construction

[0027] The pilot test summary that the applicant carries out below is described in detail as the embodiment of the present invention:

[0028] 1. Pilot scale:

[0029] 2,000 tons / year of benzene head fraction will be processed.

[0030] 2. Brief description of the process flow:

[0031] The benzene head fraction is placed in a polymerization reactor, and gradually heated under stirring conditions, the temperature in the reactor is controlled at 90-120°C, and the pressure is within the range of 0.3-0.6MPa, and the polymerization reaction is carried out for 2-4 hours. Sampling is carried out regularly to measure the change of polymerization in the reaction solution, and the end point of the reaction is controlled so that the cyclopentadiene in the material can be polymerized into dicyclopentadiene. When the residual cyclopentadiene in the reaction solution is determined to be less than 0.5mg / L, the polymerization reaction solution can enter Lightweight tower. In the light rem...

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Abstract

The invention discloses a method in extracting dicyclopentadiene and light benzene from by-products i.e. initial benzene fractions of the coal-coking crude benzene, which is characterized in that: the method comprises steps as follows: (1) the initial benzene fractions are positioned in a polymerization reactor for two to four - hour polymerization; (2) after refluxing, separation and distillation in a light fraction removal column, the polymerization fluid enters a separation and distillation column; (3) after refluxing, separation and distillation in the separation and distillation column, distillates at the top of the column are used to acquire colorless and transparent light benzene, and matter at the column bottom is mixed solution of crude products rich in dicyclopentadiene; (4) after decoloration, separation and vacuum rectification in a decolorizing column, the crude dicyclopentadiene is transformed into products with 86 to 92 percents of dicyclopentadiene. The extraction method for dicyclopentadiene and light benzene from initial benzene fractions of the coal-coking crude benzene has the advantages of simple processing, advanced technique, easy control and operation, low cost, no waste pollution, and conforming to the national industrialization policy.

Description

(1) Technical field [0001] The invention relates to a chemical extraction method, in particular to a method for extracting dicyclopentadiene and light benzene from the benzene head fraction of crude benzene by-products of coal coking. (2) Background technology [0002] In recent years, with the adjustment of energy structure, the development of my country's coal chemical industry has advanced by leaps and bounds, and large-scale mechanical coke projects have been constructed one after another. By the end of the "Eleventh Five-Year Plan", the output of large-scale mechanical coke in my country will reach more than 50 million tons. If the yield of crude benzene is 0.8-1% of coke coal, the annual output of crude benzene will reach about 5 million tons, and the crude benzene will produce 50,000 tons of benzene head fraction after extraction of "triphenyl" above. Due to the low boiling point of the benzene fraction, it is highly volatile, highly toxic, and difficult to recycle. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/61C07C15/04C07C7/177C07C7/04
Inventor 戴俊堂王建伟王胜伟周建亚
Owner 山东玉皇盛世化工股份有限公司