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Method for preparing hexane from aromatic hydrocarbon raffinate oil

A technology for raffinate oil and aromatics, applied in the production of n-hexane, isohexane and cyclohexane, which can solve the problems of low yield of cyclohexane, low added value of products, and low yield of n-hexane

Active Publication Date: 2021-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The problem to be solved by the present invention is low comprehensive utilization of existing aromatics raffinate, low yield of n-hexane, low yield of cyclohexane, single hexane component, and low added value of products. A new aromatics raffinate is proposed. A method for preparing hexane from residual oil, which is used to produce hexane from aromatic hydrocarbon raffinate oil, especially when producing n-hexane, isohexane and cyclohexane, has the advantages of high comprehensive utilization of aromatic hydrocarbon raffinate oil, high yield of normal hexane, and cyclohexane High hexane yield, various hexane components, high added value of products, etc.

Method used

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  • Method for preparing hexane from aromatic hydrocarbon raffinate oil
  • Method for preparing hexane from aromatic hydrocarbon raffinate oil

Examples

Experimental program
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Effect test

Embodiment 1

[0046] according to figure 1 Shown is a method for preparing hexane from aromatic hydrocarbon raffinate.

[0047] Containing 10wt% C5 and below components, 15wt% isohexane, 8wt% n-hexane, 20wt% methylcyclopentane, 5wt% cyclohexane and 0.1% benzene aromatics raffinate F enters the first rectification column, from The top of the first rectification column obtains stream I containing C5 and below components, the side line position obtains stream II containing isohexane, n-hexane, methylcyclopentane and benzene, and the position below the feed obtains C7 and above containing cyclohexane Component stream III, stream II obtains stream IV through a hydrogenation reactor, and stream IV obtains stream V containing isohexane, normal hexane, and hexanaphthene through an isomerization reactor, and stream V passes through such as figure 2 The shown isohexane tower, n-hexane tower, methylcyclopentane tower, and cyclohexane tower are sequentially separated to obtain isohexane, n-hexane, m...

Embodiment 2

[0053] Implementation is similar to Example 1. Containing 10wt% C5 and below components, 15wt% isohexane, 8wt% n-hexane, 20wt% methylcyclopentane, 5wt% cyclohexane and 0.1% benzene aromatics raffinate F enters the first rectification column, from The top of the first rectification column obtains stream I containing C5 and below components, the side line position obtains stream II containing isohexane, n-hexane, methylcyclopentane and benzene, and the position below the feed obtains C7 and above containing cyclohexane Component stream III, stream II obtains stream IV through a hydrogenation reactor, and stream IV obtains stream V containing isohexane, normal hexane, and hexanaphthene through an isomerization reactor, and stream V passes through such as figure 2 The shown isohexane tower, n-hexane tower, methylcyclopentane tower, and cyclohexane tower are sequentially separated to obtain isohexane, n-hexane, methylcyclopentane, and cyclohexane, wherein methylcyclopentane is rec...

Embodiment 3

[0061] Implementation is similar to Example 1. Containing 1wt% C5 and below components, 15wt% isohexane, 8wt% n-hexane, 20wt% methylcyclopentane, 5wt% cyclohexane and 0.1% benzene aromatics raffinate F enters the first rectification column, from The top of the first rectification column obtains stream I containing C5 and below components, the side line position obtains stream II containing isohexane, n-hexane, methylcyclopentane and benzene, and the position below the feed obtains C7 and above containing cyclohexane Component stream III, stream II obtains stream IV through a hydrogenation reactor, and stream IV obtains stream V containing isohexane, normal hexane, and hexanaphthene through an isomerization reactor, and stream V passes through such as figure 2 The shown isohexane tower, n-hexane tower, methylcyclopentane tower, and cyclohexane tower are sequentially separated to obtain isohexane, n-hexane, methylcyclopentane, and cyclohexane, wherein methylcyclopentane is recy...

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Abstract

The invention relates to a method for preparing hexane from aromatic hydrocarbon raffinate oil. The aromatic hydrocarbon raffinate oil F containing isohexane, n-hexane, methylcyclopentane, cyclohexane and benzene passes through the first rectification tower in sequence, and the The top of the rectification tower obtains the stream I containing C5 and below components, the side line position obtains the stream II containing isohexane, n-hexane, methylcyclopentane and benzene, and the following positions of the feed obtain the C7 and above components containing cyclohexane Sub-stream III, the C6 component in the stream III passes through the anti-isomerization reactor to obtain methylcyclopentane and circulates back to the first rectification column, and the stream II passes through the hydrogenation reactor and the isomerization reactor to obtain isohexane, n-hexane The stream V of alkane and cyclohexane is separated to obtain isohexane, n-hexane, methylcyclopentane and cyclohexane, wherein the methylcyclopentane is recycled to the isomerization reactor. The invention effectively solves the problems of low comprehensive utilization of the existing aromatic hydrocarbon raffinate oil, low yield of n-hexane, low yield of cyclohexane, single component of hexane and low added value of products, and can be applied in industrial continuous production.

Description

technical field [0001] The invention relates to a method for preparing hexane from aromatic hydrocarbon raffinate oil, in particular to a method for producing n-hexane, isohexane and cyclohexane, which effectively improves the added value of aromatic hydrocarbon raffinate oil. Background technique [0002] Aromatics raffinate is a by-product of separating aromatics from hydrogenated gasoline, in which the content of cycloalkanes is very high, mainly including cyclopentane, methylcyclopentane and cyclohexane. The ethylene yield of aromatic raffinate oil is low after cracking, and it is easy to coke during cracking, which affects the operation cycle of the cracking furnace, so the naphthenes and paraffins in the raffinate oil are separated. The naphthenes can be exported as raffinate products, and the paraffins are sent to the cracking unit as raw materials, which greatly increases the added value of the raffinate. [0003] Cyclohexane is an important basic organic chemical r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C5/29C07C5/10C07C7/04C07C9/15C07C9/16C07C13/10C07C13/18
Inventor 刘银川孙翟宗胡松王德举
Owner CHINA PETROLEUM & CHEM CORP