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A kind of ethylbenzene production device and process

An ethylbenzene and process technology, applied in the field of ethylbenzene production devices, can solve problems such as affecting the purity of reaction products, and achieve the effects of high added value, significant economic benefits, and reduced equipment investment

Active Publication Date: 2022-02-22
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned scheme has the following significant disadvantages: 1. There is a large amount of reaction tail gas in the dilute ethylene method, and components such as hydrogen, methane, and ethane have significant utilization values, but the above-mentioned scheme does not propose a utilization scheme for these components; 2. 1. A technical key of the dilute ethylene method is the impurity control in the dilute ethylene gas. Acid gas, acetylene, carbon three and above components will all affect the purity of the reaction product of ethylbenzene synthesis; and the above-mentioned schemes have not solved this problem

Method used

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  • A kind of ethylbenzene production device and process
  • A kind of ethylbenzene production device and process

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Experimental program
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Effect test

Embodiment approach

[0020] According to a preferred embodiment of the present invention, the tail gas recovery unit includes a primary pressure swing adsorption system, a secondary pressure swing adsorption system and an ethane booster connected in sequence.

[0021] According to the present invention, the function of the compression unit is to remove the acid gas and moisture in the cracked gas, and send the treated cracked gas to the cold separation unit after boosting its pressure. Preferably, the compression unit includes a primary booster compressor, an alkali washing tower, a dryer and a secondary booster compressor connected in sequence.

[0022] Wherein, the alkali washing tower is used to remove acid gas (CO 2 、H 2 S), the dryer is used for dehydration.

[0023] Preferably, the primary step-up compressor and the secondary step-up compressor are units that share a set of casings and rotors.

[0024] According to the present invention, the cold separation unit includes a deethanizer, a ...

specific Embodiment approach

[0033] According to a specific implementation manner, the ethylbenzene production process includes the following processes:

[0034] 1) Cracking the circulating cracking raw material and the fresh cracking raw material in the cracking furnace of the cracking unit into cracking gas at the outlet of the cracking furnace, and cooling by a heat exchanger to obtain the cooled cracking gas;

[0035] 2) After the cooling, the cracked gas is sent into the quenching unit for further cooling to obtain the cracked gas at the inlet of the compressor;

[0036] 3) the cracked gas at the inlet of the compressor is boosted by a step-up compressor in the compression unit, and the acid gas is removed in the alkali washing tower to obtain the cracked gas after the step-up deacidification, and then dried by a drier, Send it to the secondary boost compressor to boost the pressure again to obtain the cracked gas after the secondary boost;

[0037] 4) After the second pressurization, the cracked ga...

Embodiment 1

[0053] This embodiment is used to illustrate the ethylbenzene production device and process of the present invention.

[0054] Such as figure 1 As shown, in this embodiment, the primary booster compressor K-301 and the secondary booster compressor K-302 of the compression unit U-03 share a set of casings and rotors.

[0055] The cooling capacity of the condenser E-401 in the cold separation unit U-04 is provided by the propylene refrigeration system PR-401.

[0056] Tail gas recovery unit U-06 includes a primary pressure swing adsorption system PSA-601, a secondary pressure swing adsorption system PSA-602 and an ethane booster K-601 connected in sequence.

[0057] Specifically, ethylbenzene production process comprises the following steps:

[0058] 1) Crack the circulating cracking raw material S001 and the fresh cracking raw material S002 in the cracking furnace F-001 to obtain the cracked gas S101 at the outlet of the cracking furnace, which is cooled by the first heat exc...

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Abstract

The invention belongs to the field of hydrocarbon processing, and specifically discloses an ethylbenzene production device and process. The device includes a cracking unit, a quenching unit, a compression unit, a cold separation unit, an ethylbenzene synthesis unit and a tail gas recovery unit connected in sequence, and the The tail gas recovery unit is also connected with the cracking unit; the cracking unit, quenching unit, compression unit and cold separation unit are used to convert cracking raw materials to obtain dilute ethylene stream; the tail gas recovery unit is used to produce ethylbenzene synthesis unit The ethylbenzene reaction tail gas is separated into by-product hydrogen, tail gas recovery methane and tail gas recovery ethane, and the tail gas recovery ethane is sent back to the cracking unit. The device and process of the present invention can effectively reduce equipment investment. When maintaining the same ethylbenzene production capacity, the consumption of cracking raw materials can be reduced by more than 20%, and the consumption of fuel gas can be reduced by about 50%. At the same time, high value-added side effects can be obtained. produce hydrogen.

Description

technical field [0001] The invention belongs to the field of hydrocarbon processing, and in particular relates to an ethylbenzene production device and an ethylbenzene production process. Background technique [0002] With the development of the economy, the demand for hydrocarbon chemical raw materials is increasing day by day. As an important chemical raw material, the application market of ethylbenzene is also expanding. For a long time, the main production method of ethylbenzene is the reaction of refined ethylene and benzene to produce ethylbenzene. The reactor size of this technical route is small, and the purity of ethylene is extremely high, so it is necessary to rely on a complete set of ethylene equipment to produce polymerization grade Ethylene was used as the starting material for the reaction. As the leading device of the chemical plant, the ethylene plant has complicated process and high investment, which leads to the limitation of the economical efficiency of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/073C07C2/64C07C11/04C07C7/00
CPCC07C2/64C07C7/005C07C11/04C07C15/073
Inventor 刘罡王振维刘侃赵百仁高耸
Owner SINOPEC ENG
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