Crude benzol hydrogenation refining process

A hydrorefining and process technology, applied in the fields of hydrocarbons, chemical instruments and methods, organic chemistry, etc., can solve the problems of poor product quality, low retention rate of aromatic hydrocarbons, and large loss of aromatic hydrocarbon compounds, so as to reduce losses and improve retention. efficiency, prolonging the effect of hydrogenation reaction process

Inactive Publication Date: 2017-01-25
SICHUAN DAXING ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a crude benzene hydrorefining process to solve the problems of large loss of aromatic compounds, low retention rate of aromatics, and poor quality of products

Method used

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Embodiment Construction

[0013] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0014] A crude benzene hydrofining process, comprising a raw material pre-separation unit, a hydrofining unit, a pre-distillation unit, an extractive distillation unit, an aromatics refining unit, and a xylene distillation unit; each unit is described in detail below:

[0015] Among them, the hydrofining unit includes a reaction part and a stabilization part; the reaction part adopts a three-stage hydrogenation reaction, the...

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Abstract

The invention disclosed a crude benzol hydrogenation refining process. The crude benzol hydrogenation refining process comprises a raw material predissociation unit, a hydrofining unit, a predistillation unit, an unit of extractive distillation, an aromatic hydrocarbon refining unit and a xylene distillation unit, wherein the hydrofining unit comprises a reaction part and a steady part. The reaction part adopts a three stage hydrogenation. The first stage hydrogenation is the pre hydrofining reaction, while the second stage and the third stage hydrogenation are the main hydrofining reactions. The extractive unit distillation comprises an extractive distillation tower, a stripping tower and a liquid-liquid separation tank. When benzene is produced through the crude benzol hydrogenation refining process, the aromatic compound has the advantages of small loss, high retention rate of arene and high quality products.

Description

technical field [0001] The invention relates to a crude benzene hydrogenation refining process. Background technique [0002] In recent years, with the continuous development of the national economy, the country's demand for coke has grown rapidly, resulting in a continuous increase in the output of coking crude benzene and other resource-based by-products. Since coking crude benzene contains some unsaturated hydrocarbons and sulfur-containing and nitrogen-containing organic compounds, such as linear alkane mercaptans, aryl mercaptans, thioethers, thiophenes, dibenzothiophenes, thioindenes, pyridines, etc., it cannot be directly used as organic It can be used as a raw material only after the above-mentioned impurities are removed. The traditional impurity removal method for coking crude benzene is pickling, although this method can partially remove sulfur-containing compounds (mainly thiophene) and other impurities in crude benzene. However, the loss of aromatic compounds ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/163C07C7/08C07C7/04C07C15/04
CPCC07C7/163C07C7/04C07C7/08C07C15/04
Inventor 张光辉王晨晖吴映忠王光斌赵光美李正清
Owner SICHUAN DAXING ENERGY
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