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Method for purifying n-butane by rectifying

A technology of n-butane and rectification, applied in chemical instruments and methods, distillation purification/separation, hydrocarbon purification/separation, etc.

Inactive Publication Date: 2012-01-18
TIANJIN TAIHENG GASES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology not only has a reasonable process, but also solves the problem of producing high-purity n-butane

Method used

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  • Method for purifying n-butane by rectifying

Examples

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Effect test

Embodiment 1

[0014] Hydrogenate C4 hydrocarbons, completely hydrogenate olefins and diolefins into n-butane and isobutane, and then separate the two by rectification to obtain n-butane with higher purity; among them, C4 hydrocarbons : Hydrogenation is a volume ratio of 1:0.1mol, see the technical process figure 1 .

Embodiment 2

[0016] Hydrogenate C4 hydrocarbons, completely hydrogenate olefins and diolefins into n-butane and isobutane, and then separate the two by rectification to obtain n-butane with higher purity; among them, C4 hydrocarbons : Hydrogenation is a volume ratio of 1:0.5mol, see the technical process figure 1 .

Embodiment 3

[0018] Hydrogenate C4 hydrocarbons, completely hydrogenate olefins and diolefins into n-butane and isobutane, and then separate the two by rectification to obtain n-butane with higher purity; among them, C4 hydrocarbons : The volume ratio of hydrogenation is 1:2mol, see the technical process figure 1 .

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Abstract

The invention discloses a technology for purifying n-butane by a rectifying method. C4 hydrocarbons can be separated from hydrocarbons with other number of carbon atoms by adopting a common rectifying method, but separation of high-purity n-butane from mixed C4 hydrocarbons is required to be carried out according to the composition of the mixed C4 hydrocarbons. The boiling points of the C4 hydrocarbons are approximately equal, thus the C4 hydrocarbons are not separated by the common rectifying method. Therefore, high-purity n-butane can be obtained by hydrogenating the C4 hydrocarbons to fully convert olefins and diolefins into n-butane and iso-butane, and then rectifying for separating. The method has reasonable processes, is simple to operate, and is a simplest and more ideal technology for preparing n-butane.

Description

technical field [0001] The invention relates to a chemical product, in particular to a technology for purifying n-butane by means of rectification, which is suitable for producing n-butane. Background technique [0002] In addition to being directly used as fuel and refrigerant, this product is widely used in the production of various organic synthesis raw materials, such as butene and butadiene can be produced through dehydrogenation; isobutane can be produced through isomerization; through catalytic oxidation Maleic anhydride, acetic acid, etc. can be produced; halogenated butane can be produced; nitrobutane can be produced by nitration; carbon disulfide can be produced by catalysis at high temperature; hydrogen can be produced by steam conversion. In addition, butane can also be used as a motor fuel blend to control volatile matter; it can also be used as a deasphalting agent for heavy oil refining; a wax precipitation solvent in oil wells; an overflow agent for secondary...

Claims

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Application Information

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IPC IPC(8): C07C9/10C07C7/163C07C7/04
Inventor 李中元
Owner TIANJIN TAIHENG GASES
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