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A method for reducing the separation loss of ethylene cracking tar

A technology of ethylene cracking and tar, which is applied in the direction of tar processing through distillation, can solve the problem of large loss of tower top components, and achieve the effect of reducing loss

Active Publication Date: 2018-09-21
新疆天利石化股份有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of large loss of tower top components being taken away by non-condensable gas during the vacuum distillation of existing ethylene cracking tar, and to provide a method for reducing the separation loss of ethylene cracking tar

Method used

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  • A method for reducing the separation loss of ethylene cracking tar

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Embodiment 1

[0013] Ethylene pyrolysis tar and carbon ten are mixed into the tar rectification tower at a mass ratio of 14:1, and rectified under reduced pressure (overhead pressure -85Kpa, tower bottom temperature 195~199°C, total feed rate 15t / h, reflux rate 500 ~1000kg / h), the output of the bottom component is 11.7t / h, the output of the top component after being condensed by the top condenser is 3.3t / h, the loss should be 3.85t / h at the top of the tower according to the theoretical calculation, light The component loss is 0.55t / h, and the loss rate is 14.3%.

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Abstract

The invention discloses an ethylene cracking tar separation loss reducing method. The method includes mixing ethylene cracking tar and C10 to enter into a tar distillation tower for vacuum refinery distillation. According to the method, the C10 is used for dilution of the ethylene cracking tar, and after the vacuum refinery distillation, the C10 enters into tower top component, the tower top component can be timely cooled without being pumped out by a vacuum pump along with non-condensable gases, and tower top light component loss of ethylene cracking tar rectifying tower can be significantly reduced.

Description

technical field [0001] The invention belongs to the field of cracking tar separation, in particular to a method for reducing the separation loss of ethylene cracking tar. Background technique [0002] At present, ethylene cracking tar is a by-product of hydrocarbon cracking to produce ethylene. It can be burned as fuel oil or used to make carbon black and asphalt. Due to the small scale and scattered construction of ethylene cracking equipment in my country, it is mainly used for laying asphalt and as fuel. , only a small number of imported equipment produces carbon black, and the comprehensive utilization rate is not high, mainly because there are many components in tar that can be used, but their content is small, and the boiling point is very close, and its relative volatility a=1.1~1.2 , it is more difficult to separate, so vacuum distillation is used, because the components are complex and heavy, so the temperature at the top of the tower is high after cooling, and the pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/04
CPCC10C1/04
Inventor 李光
Owner 新疆天利石化股份有限公司