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Method for preparing polyvinyl chloride utilizing iced water

A technology for polyvinyl chloride and chilled water, applied in the field of preparing polyvinyl chloride, can solve the problems of limited production capacity, limited heat transfer intensity, small heat transfer temperature difference, etc., and achieve the effects of production safety, shortened reaction time, and stable temperature control.

Active Publication Date: 2009-07-22
新疆宜化化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process cooling water of the jacket and internal cooling baffle of the general process polymerization kettle is mostly industrial circulating water. The cooling water temperature of this process is high and the heat transfer temperature difference is small. Polymerization reactions in kettles, which have limited heat transfer strength and limited production capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] In the process of producing polyvinyl chloride by suspension method, at 70m 3 The jacket and internal cooling baffle of the polymerization reactor use -3°C low-temperature water obtained from the refrigeration unit as the process cooling water. The addition amount of vinyl chloride is 32 cubic meters, and the addition amount of desalted water is 34 cubic meters. Oxidize the composite initiator of bis-2-ethylhexyl dicarbonate and CNP, that is, cumyl peroxyneodecanoate, the addition amount of the initiator is 14.5Kg, and the polymerization reaction is completed.

Embodiment 2

[0009] In the process of producing polyvinyl chloride by suspension method, at 70m 3 The jacket and internal cooling baffle of the polymerization reactor use 0°C low-temperature water obtained from the refrigeration unit as the process cooling water. The amount of vinyl chloride added is 31 cubic meters, and the amount of desalted water added is 32 cubic meters. Two-2-ethylhexyl dicarbonate and CNP are composite initiators that are composed of cumyl peroxyneodecanoate, and the add-on of initiator is 14.3Kg to complete the polymerization reaction.

Embodiment 3

[0011] In the process of producing polyvinyl chloride by suspension method, at 70m 3 The jacket and internal cooling baffle of the polymerization reactor use 0°C low-temperature water obtained from the refrigeration unit as the process cooling water. The amount of vinyl chloride added is 29 cubic meters, and the amount of desalted water added is 30 cubic meters. Two-2-ethylhexyl dicarbonate and CNP are composite initiators that are composed of cumyl peroxyneodecanoate, and the add-on of initiator is 14.2Kg, and the polymerization reaction is completed.

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PUM

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Abstract

The invention discloses a method for preparing polyvinyl chloride by using frozen water, which belongs to the polyvinyl chloride manufacturing process. The main method is to use the -3°C-10°C low-temperature water obtained by the refrigeration unit in the polymerization reaction as the process cooling water of the polymerization kettle. The present invention adjusts the addition amount of the composite initiator according to the different temperatures of the low-temperature water, so as to further increase the heat transfer intensity, shorten the reaction time, and increase the reaction conversion rate. The quality is stable and excellent.

Description

technical field [0001] The invention relates to a method for preparing polyvinyl chloride, in particular to a method for preparing polyvinyl chloride by using cooling water obtained from a refrigerating unit as process cooling water for a polymerization kettle. Background technique [0002] The polymerization reaction for the production of polyvinyl chloride or copolymerizable monomer mixture with polyethylene as the main part is a strong exothermic reaction, and the heat of polymerization reaction must be removed in time to control the reaction temperature balance, no over temperature, no over pressure, and safe production Produce high-quality polyvinyl chloride products. At the same time, in order to control the reaction temperature in a balanced manner and maximize the production intensity of the single reactor, a composite initiator is generally used, such as the binary or multicomponent composite of EHP and CNP. As long as the reaction heat can be removed in time and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F114/06C08F2/01
Inventor 蒋远华杨晓勤王华雄卞平官陈性宏杨中泽黄乐观
Owner 新疆宜化化工有限公司