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Process method for producing hexane by using raffinate oil

A process method and raffinate oil technology, applied in chemical instruments and methods, hydrocarbon purification/separation, hydrocarbons and other directions, can solve the problem of low comprehensive utilization of raffinate oil, single hexane component, and low n-hexane yield and other problems to avoid losses and increase added value.

Active Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The problem to be solved by the present invention is that the comprehensive utilization of existing raffinate oil is low, the yield of n-hexane is low, the yield of cyclohexane is low, the hexane component is single, and the added value of the product is low. A new raffinate oil is proposed A process for producing hexane, which is used for producing hexane from raffinate oil, especially when producing n-hexane, isohexane and cyclohexane, has the advantages of high comprehensive utilization of raffinate oil, high yield of n-hexane, and cyclohexane yield. High efficiency, various hexane components, high added value of products, etc.

Method used

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  • Process method for producing hexane by using raffinate oil
  • Process method for producing hexane by using raffinate oil
  • Process method for producing hexane by using raffinate oil

Examples

Experimental program
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Effect test

Embodiment 1

[0046] according to figure 1 Shown is a process for producing hexane by utilizing raffinate oil.

[0047] The raffinate oil F containing 20wt% isohexane, 15wt% normal hexane, 20wt% methylcyclopentane, 15wt% cyclohexane and 0.1wt% benzene is removed benzene and unsaturated hydrocarbons through a hydrogenation reactor to obtain stream I , Stream I passes through the first rectification tower and the second rectification tower in turn, and stream III containing isohexane, n-hexane, methylcyclopentane and benzene is obtained from the position above the second rectification feed, and stream III is obtained from the position below the feed The C7 and above component stream V containing cyclohexane, the C6 component in the stream V passes through the anti-isomerization reactor, and the methylcyclopentane obtained by the reaction is recycled back to the first rectification tower, and the stream III is subjected to the isomerization reaction The device obtains stream IV containing iso...

Embodiment 2

[0053] Implementation is similar to Example 1. The raffinate oil F containing 20wt% isohexane, 15wt% normal hexane, 20wt% methylcyclopentane, 15wt% cyclohexane and 0.1wt% benzene is removed benzene and unsaturated hydrocarbons through a hydrogenation reactor to obtain stream I , Stream I passes through the first rectification tower and the second rectification tower in turn, and stream III containing isohexane, n-hexane, methylcyclopentane and benzene is obtained from the position above the second rectification feed, and stream III is obtained from the position below the feed The C7 and above component stream V containing cyclohexane, the C6 component in the stream V passes through the anti-isomerization reactor, and the methylcyclopentane obtained by the reaction is recycled back to the first rectification tower, and the stream III is subjected to the isomerization reaction The device obtains stream IV containing isohexane, n-hexane, methylcyclopentane, and cyclohexane, and s...

Embodiment 3

[0061] Implementation is similar to Example 1. The raffinate oil F containing 20wt% isohexane, 15wt% normal hexane, 20wt% methylcyclopentane, 15wt% cyclohexane and 0.1wt% benzene is removed benzene and unsaturated hydrocarbons through a hydrogenation reactor to obtain stream I , Stream I passes through the first rectification tower and the second rectification tower in turn, and stream III containing isohexane, n-hexane, methylcyclopentane and benzene is obtained from the position above the second rectification feed, and stream III is obtained from the position below the feed The C7 and above component stream V containing cyclohexane, the C6 component in the stream V passes through the anti-isomerization reactor, and the methylcyclopentane obtained by the reaction is recycled back to the first rectification tower, and the stream III is subjected to the isomerization reaction The device obtains stream IV containing isohexane, n-hexane, methylcyclopentane, and cyclohexane, and s...

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Abstract

The invention relates to a process method for producing hexane by using raffinate oil, benzene and unsaturated hydrocarbons in the raffinate oil F are removed through a hydrogenation reactor so as toobtain a material flow I; the material flow I passes through a first rectifying tower and a second rectifying tower in sequence, a material flow III containing isohexane, n-hexane, methylcyclopentaneand benzene is obtained from a position above the feeding of the second rectifying tower so as to obtain a cyclohexane-containing C7 and above material flow V, the C6 component in the material flow Vis subjected to reaction in a trans-isomerization reactor, the obtained methylcyclopentane is recycled back to the first rectifying tower, the material flow III is subjected to isomerization reactionand separating to obtain the isohexane, the n-hexane, the methylcyclopentane and cyclohexane, wherein methylcyclopentane is circulated to the isomerization reactor. The method effectively solves the problem that the existing raffinate oil is low in comprehensive utilization rate, the n-hexane yield is low, the cyclohexane yield is low, hexane component is single, and added value of the product islow, and can be applied to industrial continuous production.

Description

technical field [0001] The invention relates to a process method for producing hexane by using raffinate oil, in particular to a method for producing n-hexane, isohexane and cyclohexane, which effectively improves the added value of raffinate oil. Background technique [0002] The octane number of reformed raffinate is relatively low, generally only about 60. Currently, it cannot be used as motor gasoline. It can only be added in a small amount for blending. The utilization rate is low. Therefore, a comprehensive utilization of reformed raffinate is developed. technology is particularly important. Utilize the C6 components in the raffinate oil, adopt hydrogenation and isomerization methods, and finally obtain isohexane products, n-hexane products and cyclohexane products, which can not only solve the demand for n-hexane in the domestic organic solvent market, but also Effective use of reformed gasoline for deep processing and solving the problem of resource utilization has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/03C07C5/27C07C7/00C07C7/04C07C9/15C07C9/16C07C13/10C07C13/18
Inventor 刘银川孙翟宗胡松王德举
Owner CHINA PETROLEUM & CHEM CORP
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