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Method for adopting and combining adsorption and rectification for purifying n-butane

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

Inactive Publication Date: 2012-11-14
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 adopting and combining adsorption and rectification for purifying n-butane
  • Method for adopting and combining adsorption and rectification for purifying n-butane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The n-butane raw material is passed through the adsorber equipped with NaX adsorbent, the rectification tower is evacuated, and then the outlet gas of the adsorber is fed into the tower at one time, and the temperature of the tower top is controlled by ice salt condensing agent, and the tower kettle Use a warm water bath to control the temperature. During operation, the temperature of the tower kettle is 50°C, and then adjust the water temperature of the tower kettle to maintain normal operation under total reflux. Every time it is balanced for a period of time, the balance gas is discharged from the analysis port on the top of the tower and analyzed. While maintaining the operation of the tower, the product in the tower kettle is filled into the steel cylinder. See the process for details. figure 1 .

Embodiment 2

[0018] The n-butane raw material is passed through the adsorber equipped with NaX adsorbent, the rectification tower is evacuated, and then the outlet gas of the adsorber is fed into the tower at one time, and the temperature of the tower top is controlled by ice salt condensing agent, and the tower kettle Use a warm water bath to control the temperature. During operation, the temperature of the tower kettle is 70°C, and then adjust the water temperature of the tower kettle to maintain normal operation under total reflux. Every time it is balanced for a period of time, the balance gas is discharged from the analysis port on the top of the tower and analyzed. While maintaining the operation of the tower, the product in the tower kettle is filled into the steel cylinder. See the process for details. figure 1 .

Embodiment 3

[0020] The n-butane raw material is passed through the adsorber equipped with NaX adsorbent, the rectification tower is evacuated, and then the outlet gas of the adsorber is fed into the tower at one time, and the temperature of the tower top is controlled by ice salt condensing agent, and the tower kettle Use a warm water bath to control the temperature. During operation, the temperature of the tower kettle is 80°C, and then adjust the water temperature of the tower kettle to maintain normal operation under total reflux. Every time it is balanced for a period of time, the balance gas is discharged from the analysis port on the top of the tower and analyzed. While maintaining the operation of the tower, the product in the tower kettle is filled into the steel cylinder. See the process for details. figure 1 .

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Abstract

The invention discloses a technology for adopting and combining adsorption and rectification for purifying n-butane. N-butane raw materials pass through an adsorption device containing NaX adsorbents and passes through a rectification tower to be subjected to vacuum pumping treatment, then, adsorption device outlet gas is fed into the tower in one step, ice salt condensing agents are adopted at the tower top for temperature control, and warm water bath is adopted by a tower kettle for controlling the temperature. Finally, products in the tower kettle are filled into a steel cylinder under the condition of maintaining the tower operation, and when being used for producing high-purity n-butane, the process has the advantages that the separation speed is high, the equipment is simple, the operation is convenient, the technology is reliable, and the like. The technology is suitable for being used in production occasions with little consumption and higher purity requirements.

Description

technical field [0001] The invention relates to a chemical product, in particular to a technique for purifying n-butane combined with adsorption and 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 age...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C9/10C07C7/04C07C7/12
Inventor 李中元
Owner TIANJIN TAIHENG GASES
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