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A kind of method of variable temperature dehydration and desorption of vinyl chloride

A technology of variable temperature dehydration, desorption, and vinyl chloride. It is used in the disproportionation separation/purification of halogenated hydrocarbons, organic chemistry, etc. It can solve problems such as equipment corrosion and affect product quality, and achieve the effect of preventing corrosion, simple structure and improving quality.

Active Publication Date: 2017-01-04
TIANWEI CHEM +1
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Problems solved by technology

[0005] The present invention solves the current problems that vinyl chloride gas contains water and organic impurities, which affects product quality and causes corrosion to equipment, and further provides a method that can not only remove water and organic impurities in vinyl chloride gas, but also has simple process, easy operation, The variable temperature dehydration and desorption method of vinyl chloride with less investment and quick effect not only improves the quality of vinyl chloride monomer, prolongs the service life of the adsorbent, but also prevents the pipeline equipment from corroding due to the water content of the monomer

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  • A kind of method of variable temperature dehydration and desorption of vinyl chloride

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Embodiment Construction

[0025] Refer to attached figure 1 , a method for variable temperature dehydration and desorption of vinyl chloride, comprising an adsorber connected in sequence, a cooler I, a steam-water separator I, a booster, a cooler II, a steam-water separator II, a heater, a dryer A, and a dryer B, dryer C; the steps are as follows:

[0026] Vinyl chloride gas with a temperature of 40-50°C and a pressure of 0.50-0.55MPa sent from the compression process enters the adsorber through the valve V1, and after the oil and heavy molecular gases are removed through the adsorber, the valves V2 and V16 are opened. The vinyl chloride gas enters the dryer A, where the moisture in the vinyl chloride gas is removed. The vinyl chloride gas comes out from the top of the dryer A and sent to the rectification process. When the moisture absorbed by the dryer A reaches a certain level, the valves V2 and V16 are closed. ;

[0027] Open the valves V9 and V12, and the gas in the adsorber A is depressuriz...

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Abstract

A vinyl chloride varying temperature dehydration desorption method involves an adsorber, a cooler I, a steam water separator I, a supercharger, a cooler II, a steam water separator II, a heater, a dryer A, a dryer B and a dryer C sequentially connected with each other. By using the vinyl chloride varying temperature dehydration desorption method, the problem in the prior art that as vinyl chloride gas contains water and organic impurities, the product quality is influenced, corrosion to equipment is caused and the like are solved, the quality of a vinyl chloride monomer is improved, the service life of an absorbent is prolonged, and phenomenon of corrosion of pipeline equipment caused by water contained in the monomer is prevented.

Description

technical field [0001] The invention relates to a method for dehydrating vinyl chloride, in particular to a method for variable temperature dehydration and desorption of vinyl chloride. Background technique [0002] Since the vinyl chloride monomer after washing with water and alkali contains a large amount of water, the presence of water will cause the hydrolysis reaction of vinyl chloride peroxide to produce acidic substances such as hydrogen chloride, formic acid, and formaldehyde, which will corrode steel equipment and generate Fe 3+ , Fe 3+ Not only will it directly affect the progress of the polymerization reaction, but even directly participate in the polymerization reaction, and it can act as a catalyst in the polymerization process to cause the hydrolysis reaction of vinyl chloride monomer. Last Fe 3+ It exists in the resin product in the form of impurity particles, which increases the number of impurity particles in the product and reduces the product quality. T...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C21/06C07C17/38
Inventor 刘中海张国玉尹建平杨杰刘胜军肖莉郭成军李金英吴智兵金万江王涛
Owner TIANWEI CHEM
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