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Ethylbenzene production device and process

A technology of production equipment and production process, which is applied in the field of ethylbenzene production equipment, can solve the problems affecting the purity of reaction products, etc., and achieve the effects of reducing equipment investment, reducing fuel gas consumption, cracking raw materials and fuel consumption

Active Publication Date: 2018-08-21
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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  • Ethylbenzene production device and process
  • Ethylbenzene production device and process

Examples

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 acid gas, moisture, etc. in the cracked gas, and to boost the pressure of the treated cracked gas and send it to the cold separation unit. Preferably, the compression unit includes a primary boost compressor, a caustic washing tower, a dryer and a secondary boost compressor connected in sequence.

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

[0023] Preferably, the primary boost compressor and the secondary boost compressor are units that share a set of casing and rotor.

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

specific Embodiment approach

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

[0034] 1) The circulating cracked raw materials and fresh cracked raw materials are cracked in the cracking furnace of the cracking unit into cracked gas at the outlet of the cracking furnace, and cooled by the heat exchanger to obtain the cooled cracked gas;

[0035] 2) The cooled cracked gas is sent to the quench unit for further cooling to obtain cracked gas at the compressor inlet;

[0036] 3) After the cracked gas at the compressor inlet is boosted by a booster compressor in the compression unit, the acid gas is removed in the caustic washing tower to obtain a boosted deacidified gas and then the cracked gas is dried by a dryer, Send to the secondary booster compressor to boost the pressure again to obtain the cracked gas after the second boost;

[0037] 4) The cracked gas after the second boost is used to remove carbon three or more components in the deethanizer of ...

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 boost compressor K-301 and the secondary boost compressor K-302 of the compression unit U-03 are units that share a set of casing and rotor.

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

[0056] The tail gas recovery unit U-06 includes the first-stage pressure swing adsorption system PSA-601, the second-stage pressure swing adsorption system PSA-602 and the ethane booster K-601 which are connected in sequence.

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

[0058] 1) The circulating cracking raw material S001 and the fresh cracking raw material S002 are cracked in the cracking furnace F-001 to obtain the cracked gas S101 at the outlet of the cracking furnace, which i...

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Abstract

The invention specifically discloses an ethylbenzene production device and process, belonging to the field of hydrocarbon processing. The ethylbenzene production device comprises 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, wherein the tail gas recovery unit is connected with the cracking unit; the cracking unit, the quenching unit, the compression unit and the cold separation unit are used for converting cracking feedstock into dilute ethylene material flow; and the tail gas recovery unit is used for separating ethylbenzene reaction tail gas produced by the ethylbenzene synthesis into the by-product hydrogen, tail gas-recovered methane and tail gas-recovered ethane, and thetail gas-recovered ethane is sent back to the cracking unit. The device and process of the invention can effectively reduce the investment of equipment, lowers the consumption of the desired crackingfeedstock by 20% or more and the consumption of fuel gas by about 50% while maintaining the same ethylbenzene production capacity, and can prepare the by-product hydrogen with high added value.

Description

Technical field [0001] The invention belongs to the field of hydrocarbon processing, and specifically 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 for ethylbenzene is also expanding. For a long time, the main production method of ethylbenzene has been 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. It is necessary to rely on a complete set of ethylene plant to produce polymerization grade. Ethylene is used as a raw material for the reaction. As the leading device of the chemical plant, the ethylene plant has complicated processes and high investment, which in turn leads to restrictions on the economics of the technology f...

Claims

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Application Information

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Patent Type & Authority Applications(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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