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Control method for separating cyclopentadiene from C5 fraction by utilizing dimerization method

A technology for cyclopentadiene and carbon five fractions, which is applied in chemical instruments and methods, purification/separation of hydrocarbons, hydrocarbons, etc., and can solve problems such as difficulty in obtaining optimal reaction results

Inactive Publication Date: 2014-02-12
QINGDAO ECSS SOFT TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The dimerization reaction is carried out in multiple special reactors, and the reaction temperature is controlled to achieve the required conversion rate. The previous design and operation are based on empirical values. Due to the existence of various complex chemical reactions in the actual operation process, according to the empirical values It is often difficult to obtain optimal response results

Method used

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  • Control method for separating cyclopentadiene from C5 fraction by utilizing dimerization method
  • Control method for separating cyclopentadiene from C5 fraction by utilizing dimerization method
  • Control method for separating cyclopentadiene from C5 fraction by utilizing dimerization method

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Experimental program
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Effect test

Embodiment 1

[0047] The total C5 feed is 165.148 kmol / h, a total of 11,424 kg / h, of which

[0048] Cyclopentadiene 50.183kmol / h

[0049] Isoprene 49.893 kmol / h

[0050] Dicyclopentadiene 0.000 kmol / h

[0051] Three-stage CSTR reactor is used, each reactor has an effective volume of 20m 3 , Volume flow 17.85 m 3 / h, the residence time per kettle is 1.120 hours. The optimized control results are shown in Table 1.

[0052] Table 1. Optimization results of cyclopentadiene dimerization in CSTR reactor

[0053]

Embodiment 2

[0055] The total carbon five feed is 270.957 kmol / h, totaling 18750kg / h, of which

[0056] Cyclopentadiene 75.922 kmol / h

[0057] Isoprene 73.267 kmol / h

[0058] Dicyclopentadiene 2.168 kmol / h

[0059] Adopt 4 PFR reactors, each reactor has an effective volume of 32 m 3 , Volume flow 29.28 m 3 / h, the residence time per kettle is 1.093 hours. The optimized control results are shown in Table 2.

[0060] Table 2. Optimization results of cyclopentadiene dimerization in PFR reactor

[0061]

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Abstract

The invention discloses a control method for separating cyclopentadiene from a C5 fraction by utilizing a dimerization method. The method makes the loss of cyclopentadiene and the content of cyclopentadiene in the outlet be the least through controlling the reactor temperature, and comprises the following steps: establishing an objective function and function expressions of each variant in the objective function so as to calculate the optimal value of reaction temperature T; and substituting the optimal value into each control circuit to achieve the goal of controlling the reaction temperature. The method makes the loss of cyclopentadiene and the content of cyclopentadiene in the outlet be the least, thus maximally recycles cyclopentadiene to make the content of cyclopentadiene reach the tolerant range of the extraction and rectification system, so that the product yield is increased and the cost is reduced.

Description

Technical field [0001] The invention belongs to the cross-field of chemical process, chemical engineering and control engineering, and relates to a control method for separating cyclopentadiene from cracked carbon five fractions. Background technique [0002] The industrial by-product of oil and gas cracking to make ethylene accounts for about 10-20% of the C5 fraction of ethylene production. It is rich in important chemical raw materials such as cyclopentadiene, isoprene, piperylene and tert-pentene. To date, heating dimerization is still the most widely used industrial separation method for separating cyclopentadiene from the C5 fraction. This method utilizes the point that cyclopentadiene is easier to dimerize than other carbon five hydrocarbons when heated, and dimerizes cyclopentadiene (CPD) into dicyclopentadiene (DCPD) by heating, and then uses the boiling point of dicyclopentadiene ( 166.6°C) is significantly higher than the boiling point of other carbon five hydrocarbo...

Claims

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Application Information

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IPC IPC(8): C07C11/18C07C11/173C07C7/177
Inventor 韩方煜王浩吴国旭侯亮张明孙长明林慧忠
Owner QINGDAO ECSS SOFT TECH
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