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N-butane extraction method by adsorption separation

A technology of adsorption separation and n-butane, applied in the direction of adsorption purification/separation, organic chemistry, etc.

Inactive Publication Date: 2012-02-15
TIANJIN TAIHENG GASES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • N-butane extraction method by adsorption separation

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Embodiment 1

[0020] Under the protection of pure hydrogen or pure nitrogen, n-butane, isobutane, and propane are separated, and high-purity n-butane is adsorbed and retained in the adsorption phase, and then the molecular sieve is heated or assisted by nitrogen purging to make n-butane The high-purity n-butane product can be obtained by collecting the desorbed gas, and the product purity is 99.5%. see details figure 1 .

Embodiment 2

[0022] Under the protection of pure hydrogen or pure nitrogen, n-butane, isobutane, and propane are separated, and high-purity n-butane is adsorbed and retained in the adsorption phase, and then the molecular sieve is heated or assisted by nitrogen purging to make n-butane desorption of alkane, and the high-purity n-butane product can be obtained by collecting the desorption gas. The product purity is 99.8%. For details, see figure 1 .

Embodiment 3

[0024] Under the protection of pure hydrogen or pure nitrogen, n-butane, isobutane, and propane are separated, and high-purity n-butane is adsorbed and retained in the adsorption phase, and then the molecular sieve is heated or assisted by nitrogen purging to make n-butane desorption of alkanes, and the high-purity n-butane product can be obtained by collecting the desorption gas. The product purity is 99.5%. For details, see figure 1 .

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Abstract

The invention discloses a n-butane extraction method by adsorption separation, comprising the following steps of: separating n-butane, isobutene, propane and the like, adsorbing high-purity n-butane in an adsorbed phase, heating a molecular sieve or combined with blowing by the use of nitrogen, followed by desorption of n-butane, and collecting the desorbed gas to obtain the high-purity n-butane product with the purity being 99.5-99.8%. The method for producing high-purity n-butane by the technology has advantage of rapid separation speed, simple equipment, convenient operation, reliable technology and the like, and is suitable for production situations with less amount and high purity requirement.

Description

technical field [0001] The invention relates to a chemical product, in particular to a technology for purifying n-butane by means of adsorption and separation, 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 [2]; 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 age...

Claims

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Application Information

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IPC IPC(8): C07C9/10C07C7/13
Inventor 李中元
Owner TIANJIN TAIHENG GASES
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