Xylene disproportionation reaction product separation system based on thermal high-pressure separation process and separation method of the xylene disproportionation reaction product separation system

A disproportionation reaction and reaction product technology, applied in the field of p-xylene disproportionation reaction product separation, can solve the problems of consuming cooling load and increasing the heating load of the fractionation process, so as to reduce heating load, reduce process energy consumption, and avoid repeated cooling- The effect of the heating process

Inactive Publication Date: 2016-04-20
SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The temperature of the aromatics product obtained by the above process is about 40°C, and the subsequent fractionation process needs to raise the temperature of the aromatics product to a hig

Method used

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  • Xylene disproportionation reaction product separation system based on thermal high-pressure separation process and separation method of the xylene disproportionation reaction product separation system
  • Xylene disproportionation reaction product separation system based on thermal high-pressure separation process and separation method of the xylene disproportionation reaction product separation system
  • Xylene disproportionation reaction product separation system based on thermal high-pressure separation process and separation method of the xylene disproportionation reaction product separation system

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Embodiment 1

[0038] Such as figure 1Shown, the present invention provides a kind of xylene disproportionation reaction product separation system based on thermal high fractionation process, described system comprises disproportionation reaction system and reaction product separation system connected successively, and described reaction product separation system comprises thermal high fractionation tank 5. Heat exchanger 6, air cooler 7, water cooler 8 and reaction product separation tank 9; the gas discharge port of heat high fraction tank 5 is connected with heat exchanger 6, air cooler 7, water cooler 8 and reaction product separation tank successively The feed port of 9 is connected, and the liquid discharge port of reaction product separation tank 9 is connected with heat exchanger 6.

[0039] The disproportionation reaction system includes a feed heat exchanger 2, a heating furnace 3 and a disproportionation reactor 4 connected in sequence; the discharge port of the disproportionation...

Embodiment 2

[0042] Taking the 1.4 million tons / year disproportionation unit of an oil refinery as an example, the device described in Example 1 was used to separate the xylene disproportionation reaction product.

[0043] The disproportionation reaction feed 1 enters the feed heat exchanger 2 as a refrigerant, and enters the heating furnace 3 and the disproportionation reactor 4 after heat exchange, and the disproportionation reaction is carried out in the disproportionation reactor 4, wherein the temperature of the disproportionation reaction is 350-460°C. The reaction pressure is 2.88-3.08MPa, the disproportionation reaction product (its specific composition is shown in Table 1) enters the feed heat exchanger 2 and after heat exchange with the disproportionation reaction feed, the temperature reaches 100-120°C, and enters without cooling after heat exchange. Thermal high-separation tank 5, the first gas-liquid separation is carried out in the thermal high-separation tank 5, wherein the t...

Embodiment 3

[0057] Except that the temperature of the feed heat exchanger 2 and the disproportionation reaction feed heat exchange reaches 90-100°C, the temperature of the thermal high-separation tank is 90-100°C, and the pressure is 2.5MPa, and the reaction product separation tank 9 in the heat exchanger 6 After the liquid phase heat exchange, the air cooler 7 and the water cooler 8 are cooled to a temperature of 30°C, the pressure of the reaction product separation tank 9 is 2.4MPa, the liquid phase obtained by the thermal high fraction tank 5 and the liquid phase of the reaction product separation tank 9 Except that the temperature reached 80°C after mixing, other operating procedures and material consumption were the same as those in Example 2.

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Abstract

The invention provides a xylene disproportionation reaction product separation system based on a thermal high-pressure separation process and a separation method of the xylene disproportionation reaction product separation system. The system comprises a disproportionation reaction system and a reaction product separation system, which are connected in sequence, wherein the reaction product separation system comprises a thermal high-pressure separation tank, a heat exchanger, an air cooler, a water cooler and a reaction product separation tank; a gas discharging hole of the thermal high-pressure separation tank is sequentially connected with the heat exchanger, the air cooler, the water cooler and a feeding hole of the reaction product separation tank; a liquid discharging hole of the reaction product separation tank is connected with the heat exchanger. According to the xylene disproportionation reaction product separation system, under the condition of basically not influencing the purity of circulating hydrogen and the yield of aromatic hydrocarbon, repeated cooling and heating processes of thermal high-pressure separation liquid are reduced; a heating load of a subsequent fractionation system is reduced; meanwhile, the flow of a gas phase of the thermal high-pressure separation tank is obviously reduced and a cooling load of the reaction product is extremely reduced; compared with the prior art, the cooling load is reduced by more than 30 percent, the heating load is reduced by more than 50 percent and an energy-saving effect is remarkable.

Description

technical field [0001] The invention belongs to the field of separation of p-xylene disproportionation reaction products, relates to a xylene disproportionation reaction product separation system and a separation method thereof, in particular to a xylene disproportionation reaction product separation system and a separation method based on a thermal high-resolution process. Background technique [0002] The p-xylene (PX) unit is one of the core raw material units in the chemical fiber industry. It is used to reform the C in gasoline 7 -C 9 Aromatics are used as raw materials to produce products such as benzene, p-xylene and o-xylene. Among them, the disproportionation reaction unit is represented by toluene and C 9 -C 10 Aromatic hydrocarbons are used as raw materials to generate benzene and C through disproportionation and transalkylation reactions 8 Aromatics. In the disproportionation reaction process, the temperature of the disproportionation reaction product leavin...

Claims

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Application Information

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IPC IPC(8): B01D5/00B01D53/00
CPCB01D5/0036B01D5/0054B01D5/009B01D5/0093B01D53/002
Inventor 余金森周斌孙虎良李振峰朱世杰
Owner SHANGHAI YOUHUA PROCESS INTEGRATED TECH CO LTD
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