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Environment-friendly method for preparing chlorinated polyethylene by adopting water phase method

A chlorinated polyethylene and environment-friendly technology, applied in the field of environment-friendly water-phase preparation of chlorinated polyethylene, can solve the problems of waste water pollution, reduce the COD content of waste water, etc., and achieve the advantages of reducing pollution, improving production efficiency, and reducing treatment costs. Effect

Active Publication Date: 2017-09-01
江苏科利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above technical problems, the present invention has designed and developed a method for preparing chlorinated polyethylene by an environment-friendly aqueous phase method, the main purpose of which is to solve the problem of wastewater pollution produced in the conventional chlorinated polyethylene production process and reduce the COD content in wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the chlorinated polyethylene described in the present embodiment, its steps are:

[0028] a. Add 16000kg of water, 20kg of sodium polymethacrylate+20kg of talcum powder, 2kg of emulsifier sodium dodecylbenzenesulfonate into a 25 cubic reactor, and add 2200kg of powdery high-density polyethylene in a stirring state until powdered The material is basically suspended in water;

[0029] b. Heat to make the temperature of the material reach 90°C, seal the reactor and feed chlorine gas to react, the total chlorine flow is 2500kg; the reaction temperature is 90-130°C, divided into 6 chlorine flow temperature sections, and the reaction time is 4 hours, 6 The chlorine flow temperature sections are 90-95°C, 95-100°C, 100-110°C, 110-120°C, 120-125°C and 125-130°C, and the amount of chlorine flow in each chlorine flow section is 5 parts by weight. %; 10%; 5%; 18%; 20% and 32%, the chlorine flow rate of each chlorine flow section is 1800kg / h; 1600kg / h; 155...

Embodiment 2

[0032] The preparation method of the chlorinated polyethylene described in the present embodiment, its steps are:

[0033] a. Add 16,000kg of water, 15kg of polyvinyl alcohol + 30kg of white carbon black, and 2.0kg of emulsifier TX-10 into a 25 cubic reaction kettle, and add 2,200kg of powdered high-density polyethylene under stirring until the powder is basically suspended in water;

[0034]b. Heat to make the temperature of the material reach 90°C, seal the reactor and feed chlorine gas to react, the total chlorine flow is 2500kg; the reaction temperature is 90-130°C, divided into 6 chlorine flow temperature sections, the reaction time is 3.5 hours, 6 The chlorine flow temperature sections are 90-95°C, 95-100°C, 100-110°C, 110-120°C, 120-125°C and 125-130°C, and the amount of chlorine flow in each chlorine flow section is 5 parts by weight. %; 10%; 5%; 18%; 20% and 32%, the chlorine flow rate of each chlorine flow section is 1800kg / h; 1600kg / h; 1550kg / h; 1000kg / h; 1200kg / h; ...

Embodiment 3

[0037] The preparation method of the chlorinated polyethylene described in the present embodiment, its steps are:

[0038] a. add 16000kg water, 10kg sodium polymethacrylate, 30kg white carbon black, 2.0kg emulsifier oxa-fluorine-containing acyl phenyl sulfonate sodium in 25 cubic reactor, add powdery high-density polyethylene 2200kg under stirring state, Until the powder is basically suspended in water;

[0039] b. Heat to make the temperature of the material reach 92°C, seal the reactor and feed chlorine gas to react, the total chlorine flow is 2500kg; the reaction temperature is 92-130°C, divided into 6 chlorine flow temperature sections, and the reaction time is 3 hours, 6 The chlorine flow temperature sections are 90-95°C, 95-100°C, 100-110°C, 110-120°C, 120-125°C and 125-130°C, and the amount of chlorine flow in each chlorine flow section is 5 parts by weight. %; 10%; 5%; 18%; 20% and 32%, the chlorine flow rate of each chlorine flow section is 1800kg / h; 1600kg / h; 1550k...

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Abstract

The invention relates to the field of chlorinated polyethylene, and in particular relates to an environment-friendly method for preparing the chlorinated polyethylene by adopting a water phase method. The method comprises the following steps: a, adding 100 to 150 parts by weight of high-density polyethylene as well as 1.5 to 2.5 parts by weight of composite dispersant and 0.02 to 0.20 part by weight of emulsifying agent into water to obtain a mixture, and enabling the high-density polyethylene to be suspended in water in a stirring state; b, heating the mixture, introducing 110 to 170 parts by weight of chlorine at six temperature stages to carry out chlorination reaction, separating a chlorinated product from other mediums by adopting a filtering method after the reaction is fully completed, and repeatedly washing with water under a stirring condition; c, adding a neutralizer into the chlorinated product to carry out neutralization, and finally centrifuging and drying the chlorinated product to obtain a finished product with chlorine content of 33 to 37%. In the ways, according to the preparation method disclosed by the invention, chemical oxygen demand (COD) content of wastewater produced in a conventional production process of the chlorinated polyethylene can be reduced, and the technical problem of environment protection of production wastewater is solved.

Description

technical field [0001] The invention relates to the field of chlorinated polyethylene, in particular to an environment-friendly aqueous phase method for preparing chlorinated polyethylene. Background technique [0002] Chlorinated polyethylene is a polymer elastomer between rubber and plastic resin. From the application point of view, it can be divided into plastic modified type and rubber type. In the 1960s, it was first successfully developed by the German Hoechst company and realized industrial production, and then the United States, Britain and other countries also successively built production facilities. Due to its excellent comprehensive physical properties and economical industrial solutions and application value, chlorinated polyethylene has been valued by the industry and the scientific and technological circles. At present, there are more than 50 companies in the world engaged in the research and production of chlorinated polyethylene, with an annual production c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F8/22
CPCC08F8/22C08F10/02
Inventor 张新江郑宝钱景伟刘毓红孙锦伟
Owner 江苏科利新材料有限公司
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