Dehydration device and dehydration method for aqueous vinyl chloride monomer

A technology for water-containing vinyl chloride and vinyl chloride monomers, which is applied in the disproportionation separation/purification of halogenated hydrocarbons, organic chemistry, etc., can solve the problem of high production cost of dehydration devices, and achieve safe and reliable dehydration effects, convenient operation and convenient use.

Active Publication Date: 2018-04-27
XINJIANG ZHONGTAI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a dehydration device and dehydration method for vinyl chloride monomer containing water, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of existing dehydration devices. The problem of high production costs

Method used

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  • Dehydration device and dehydration method for aqueous vinyl chloride monomer

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Embodiment 1

[0022] Embodiment 1, as attached figure 1 As shown, the dehydration device of the aqueous vinyl chloride monomer includes a first spherical tank 1 and a steam-water separator 2; the bottom of the first spherical tank 1 is integrally fixed with the first accumulated water communicated with the cavity of the first spherical tank 1 Bag 3 has a water outlet end at the bottom of the first water accumulation bag 3, and has a vinyl chloride recovery port and a first water inlet end at the top of the steam-water separator 2; the water outlet end of the first water accumulation bag 3 and the soda water The first water inlet end of the separator 2 is fixedly connected together through the first water outlet pipe 4, and a vinyl chloride recovery pipe 5 is fixedly installed on the vinyl chloride recovery port end of the steam-water separator 2, and there is steam at the upper part of the steam-water separator 2. At the inlet end, the steam pipe 6 is fixedly installed on the steam inlet en...

Embodiment 2

[0029] Embodiment 2, as attached figure 1 Shown, the dehydration method of the dehydration device that this uses hydrous vinyl chloride monomer, carries out according to the following steps: the first step, hydrous vinyl chloride monomer is left standstill in the first spherical tank 1 or the second spherical tank 20 for 6h to After standing for 8 hours, the water-containing vinyl chloride monomer is divided into upper and lower layers. The upper layer is the vinyl chloride monomer containing a small amount of water, and the lower layer is water containing a small amount of vinyl chloride monomer. The vinyl chloride monomer containing a small amount of water passes through the first outlet The pipe 11 or the second liquid outlet pipe 23 enters the solid alkali drier 10 for drying treatment, and after the drying treatment, it is sent to the polymerization process through the vinyl chloride monomer pipeline 12; in the second step, the water containing a small amount of vinyl chlo...

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Abstract

The invention relates to the technical field of dehydration devices, and relates to a dehydration device and a dehydration method for aqueous vinyl chloride monomers; the dehydration device for aqueous vinyl chloride monomers includes a first spherical tank and a steam-water separator; A first water storage bag communicating with the cavity of the first spherical tank is fixed, there is a water outlet port at the bottom of the first water storage bag, and a vinyl chloride recovery port and a first water inlet port are respectively arranged at the top of the steam-water separator The water outlet end of the first accumulated water bag and the first water inlet end of the steam-water separator are fixedly connected together through the first water outlet pipe, and a vinyl chloride recovery pipe is fixedly installed on the vinyl chloride recovery port end of the steam-water separator. The invention has a reasonable and compact structure and is easy to use. Through the cooperative use of the first spherical tank, the second spherical tank, the steam-water separator and the solid alkali dryer, the purpose of dehydrating the hydrous vinyl chloride monomer is realized, and it is safe, reliable and has a good dehydration effect. The characteristics are convenient for operation, improve work efficiency and reduce production cost.

Description

technical field [0001] The invention relates to the technical field of dehydration devices, and relates to a dehydration device and a dehydration method for vinyl chloride monomer containing water. Background technique [0002] During the production of vinyl chloride monomer by calcium carbide method, water is inevitably brought into the system. The presence of water will lead to the hydrolysis reaction of vinyl chloride peroxide to produce acidic substances such as hydrogen chloride (which becomes hydrochloric acid when it meets water), formic acid, formaldehyde, etc., which will corrode steel equipment, and the generated iron ions will directly affect the quality of PVC resin. The presence of iron ions promotes the reaction of oxygen in the system with vinyl chloride monomer to form peroxide. The latter can not only hydrolyze repeatedly, but also trigger the polymerization of vinyl chloride monomer to produce PVC with a low degree of polymerization, which will cause self-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C21/06C07C17/38
Inventor 黄胜兵赵永禄王雅玲郝江涛
Owner XINJIANG ZHONGTAI CHEM CO LTD
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