Treatment system and treatment method for divinyl benzene production tail gas

A divinylbenzene and treatment system technology, which is applied in the direction of gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of no process technology and few patents related to divinylbenzene tail gas treatment, and achieve the amount of absorbent Reasonable, mild operating temperature and low energy consumption

Active Publication Date: 2022-05-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current market price of divinylbenzene is relatively high, but there are few reports about the reaction, synthesis and patents of divinylbenzene, especially about the tail gas treatment system in the production process of divinylbenzene.
[0005] The above several patents introduced the separation method of divinylbenzene and the recovery method of the produced tar, but did not involve any process technology for the treatment of divinylbenzene tail gas

Method used

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  • Treatment system and treatment method for divinyl benzene production tail gas
  • Treatment system and treatment method for divinyl benzene production tail gas
  • Treatment system and treatment method for divinyl benzene production tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] as Figure 1 As shown, the exhaust gas treatment system for the production of divinylbenzene in Example 1 comprises: a tail gas absorption tower, a first desorption tower, a second desorption tower, a flash tank, a heat exchanger, a heater, a incoming material distributor, a first mixer, an exhaustor, a second mixer, a cooler and a third mixer, wherein the exhaust gas absorption tower I is provided with a tower bottom inlet, for receiving absorbers and fresh absorbers from the desorption tower, the tower bottom outlet and the tower top outlet; the first desorption tower and the second desorption tower are respectively provided with a tower top inlet, Tower bottom inlet, tower top outlet and tower bottom outlet; flash tank is provided with inlet, tower top outlet and tower bottom outlet; cooler and heater are respectively provided with inlet and outlet; heat exchanger is provided with cold material inlet and cold material outlet, hot material inlet and hot material outlet.

[0...

Embodiment 2

[0085] Example 2 adopts the treatment system and treatment method in Example 1, the difference is only in the exhaust gas absorption tower, the first desorption tower, the second desorption tower, the heater and the cooler using the operating conditions in Table 3, the amount of absorbent is 7.2 times the feed mass. The feed composition and separation effect are shown in Table 4.

[0086] Table 3

[0087]

[0088] Table 4

[0089]

[0090]

[0091] According to the calculations in Table 4, the recovery rate of benzene, toluene, diethylbenzene and divinylbenzene was 98.92%.

Embodiment 3

[0093] Example 3 is substantially the same as Example 2, the outlet temperature of the cooler is 30 ° C. The feed composition and separation effect of Example 3 is shown in Table 5.

[0094] Table 5

[0095]

[0096]According to the calculations in Table 5, the recovery rate of benzene, toluene, diethylbenzene and divinylbenzene is 98.64%.

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PUM

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Abstract

The invention provides a treatment system for divinyl benzene production tail gas. The treatment system comprises a tail gas absorption tower, a first desorption tower and a second desorption tower, wherein the first desorption tower and the second desorption tower are respectively connected with the tail gas absorption tower. By means of the absorption tower and the two desorption towers connected with the absorption tower in parallel, a good recovery effect is achieved, and meanwhile the device has the advantages of being easy to operate and easy to control.

Description

Technical field [0001] The present invention relates to the technical field of production of divinylbenzene, specifically to a processing system and treatment method for the production of exhaust gas from divinylbenzene. Background [0002] Divinylbenzene is a very useful crosslinking agent, mainly used in the manufacture of plastics and ion exchange resins. Globally, the proportion of divinylbenzene consumed in various application areas is 66.8% of ion exchange resins, 13.9% of specialty plastics, 7.3% of rubber, 3.2% of coatings, 2.3% of adhesives, 1.3% of electronics and 5.2%. After the dehydrogenation of diethylbenzene to generate intermediate, pair, or o-mixed divinylbenzene and other target products, the reaction products from the dehydrogenation reaction system into the process condensate treatment and gas system, into the exhaust gas compression system, and then into the use of the absorption system to absorb and recycle the aromatic material entrained in the incoming mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18B01D53/14
CPCB01D53/18B01D53/1412B01D53/1487B01D53/1493B01D53/1418B01D2252/205B01D2252/504B01D2257/7027Y02P20/10
Inventor 张彬刘文杰
Owner CHINA PETROLEUM & CHEM CORP
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