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Production process for polyethylene device condensing agent

A production process and technology for condensing agents, which are applied in the petroleum industry, heat exchange materials, hydrocarbon distillation, etc., can solve the problems of n-pentane backlog, low production engineering yield, low isopentane content, etc., and achieve low operating costs. , Condensation effect is good, the effect of saving investment

Inactive Publication Date: 2011-05-04
GUANGRAO COUNTY LIYOU CHEM IND
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] The condensing agent used in the existing ethylene plant mostly uses pure isopentane or hexane, which requires high purity, and the purity of isopentane is above 99%. Most domestic isopentane producers are separated from stable light hydrocarbons by rectification Therefore, the content of isopentane in stable light hydrocarbons is low, the production engineering yield is low, and it is easy to cause a backlog of pure n-pentane

Method used

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  • Production process for polyethylene device condensing agent

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Embodiment Construction

[0008] A production process of a condensing agent for a polyethylene plant, the production steps of which are sending naphtha (20°C, 0.8MPa) into a depentanizer, the operating pressure of the depentanizer is 0.55MPa, and the temperature at the top of the tower is 82°C , the temperature at the bottom of the tower is 162°C; the >nC5 component is separated from the bottom of the tower, and the ≤nC5 component is separated from the top of the tower and enters the debutanizer; the operating pressure of the debutanizer is 0.65MPa, and the top temperature is 58 ℃, the temperature at the bottom of the tower is 94°C; light components such as C3 and C4 are separated from the top of the tower, mixed pentane is separated from the bottom of the tower, and sent to the condensing agent generating tower for further separation; the operating pressure of the condensing agent generating tower is 0.3 MPa, the temperature at the top of the tower is 63°C, the temperature at the bottom of the tower is...

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Abstract

The invention provides a production process for a polyethylene device condensing agent, and belongs to the field of organic chemical industry. The production process comprises the following steps of: feeding naphtha into a depentanizer; separating components of less than or equal to nC5s out from the top of the tower; feeding into a debutanizing tower; separating mixed pentane out from the bottom of the tower; feeding into a condensing agent generating tower for further separation; and separating the condensing agent out from the bottom of the tower, wherein the condensing agent comprises the components, namely n-pentane and isopentane in a ratio of 78 to 22. The production process has the advantages of good condensing effect, small investment, low operation cost and environmental friendliness and is safe.

Description

Technical field: [0001] The invention relates to a condensing agent for polyethylene production equipment, which belongs to the field of organic chemical industry. Background technique: [0002] The condensing agent used in the existing ethylene plant mostly uses pure isopentane or hexane, which requires high purity, and the purity of isopentane is above 99%. Most domestic isopentane producers are separated from stable light hydrocarbons by rectification Therefore, the content of isopentane in stable light hydrocarbons is low, the production engineering yield is low, and it is easy to cause a backlog of pure n-pentane. Invention content: [0003] The purpose of the present invention is to provide a production process of the condensing agent of polyethylene plant, which effectively solves the deficiencies of the prior art. [0004] The technical solution adopted in the present invention is: a production process of condensing agent for a polyethylene plant, the production s...

Claims

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Application Information

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IPC IPC(8): C09K5/10C10G7/00
Inventor 李存友韩文波
Owner GUANGRAO COUNTY LIYOU CHEM IND
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