Method for producing high chlorinated polyethylene

A technology of high-chlorinated polyethylene and polyethylene, which is applied in the field of industrial production and manufacture of high-chlorinated polyethylene, can solve problems such as water pollution, water phase production pollution, and unstable quality, and achieve the effect of reducing water pollution

Inactive Publication Date: 2009-06-24
WEIFANG YAXING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the HCPE products produced by this method have the following disadvantages through practical application testing: First, the product particles generated by the reaction are compact, and the internal acid is not easy to come out, resulting in poor thermal stability of the product, and the resulting coating is easy to change color
At the same time, due to the compact particles and poor solubility, the coating adhesion is not high; second, the reactor is small, the batch size is small, and the control technology is low, which also makes the quality unstable; Chlorinated polyethylene products discharge 700kg of 100% HCl, all in the form of low-concentration acid-containing wastewater. For example, based on the waste acid solution containing 5% hydrochloric acid, the discharge of acid-containing wastewater per ton of high-chlorinated polyethylene products reaches 14 tons, the water pollution to the surrounding environment is very serious

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0019] Take raw material polyethylene with a melt index MI between 50 and 120 g / 10 min. The raw material is crushed and sieved to obtain 500-550 kg of polyethylene powder with a particle size of 100 μm to 500 μm. Add 10m to the 12500L enamel reactor 3 18-22% hydrochloric acid, add 1 to 2 kg of surfactant AEO, 0.4 to 1.0 kg of emulsifier MO, 2 to 3 kg of release agent silicone oil, add raw polyethylene powder, add initiator DCP 3 to 5 kg, and then With a cover, the total amount of chlorine gas is 2200kg. Set the first stage temperature to 82~86℃, the first stage pressure 0.10~0.15MPa, the chlorine flow time is 3 hours, the chlorine gas flow is 55% of the total chlorine; the second stage temperature 92~98℃, the second stage pressure 0.25~0.30MPa, chlorine venting time 1.5 hours, chlorine venting amount is 25% of total chlorine gas; third stage temperature 108~112℃, third stage pressure 0.35~0.40MPa, chlorine venting time 1.5 hours, inject remaining chlorine gas . After the chlorine ...

Embodiment 2

[0022] Take the raw material polyethylene, the melt index value MI is between 20-60g / 10min, the raw material is crushed and sieved to obtain 500-520kg of polyethylene powder with a particle size of 100μm-500μm. Add 10m to the 12500L enamel reactor 3 18 to 22% hydrochloric acid solution, add 1 to 2 kg of surfactant AEO, add 0.4 to 1.0 kg of emulsifier MO, add 3 to 5 kg of release agent silicone oil, add raw polyethylene powder, add initiator DBP 3 to 5 kg , And then capped, the total amount of chlorine gas introduced is 2200kg, the first stage temperature is 84~88℃, the first stage pressure is 0.15~0.20MPa, the chlorine venting time is 2 hours, and the chlorine venting volume is 50% of the total chlorine; The temperature of the second stage is 96~100℃, the pressure of the second stage is 0.30~0.35MPa, the chlorine flow time is 1 hour, the amount of chlorine gas is 30% of the total chlorine; the temperature of the third stage is 110~114℃, and the pressure of the third stage is 0.40~...

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PUM

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Abstract

The invention discloses a method for producing high chlorinated polyethylene. In the method, the high chlorinated polyethylene is produced in a way that a high molecular polymer is taken as a raw material and suspended in hydrochloric acid solution for chlorination reaction, a surfactant, an emulsifier and a separant are added to the hydrochloric acid and mixed, polyethylene and an initiator are added to obtain a suspension system, then the suspension system is heated, and chlorine gas is introduced for chlorination reaction at the same time. The production method is simple and feasible, and acid-containing water produced in the production can be recycled, thus reducing the environmental pollution.

Description

Technical field [0001] The invention relates to a method for producing high chlorinated polyethylene, in particular to an industrial production method for producing high chlorinated polyethylene by suspending chlorination in a hydrochloric acid solution. Background technique [0002] Highly chlorinated polyethylene (HCPE) is a chlorine-containing polymer produced after polyethylene is chlorinated, with saturated molecular chains, stable chemical properties, non-toxic, odorless, and harmless to the environment. Mainly used as coatings, inks, adhesives, etc. Highly chlorinated polyethylene is dissolved in toluene, xylene and higher alcohols. The coatings prepared by its solution have excellent chemical resistance, salt spray resistance, and high adhesion to steel, cement and other substrates. It is an ideal anticorrosive material. Membrane materials are now widely used in heavy-duty anti-corrosion coatings, containers and building anti-corrosion coatings. [0003] There are many pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F8/22
Inventor 陈华森龚以行刘建平隋树鹏杨雷王景春孙岩程文江高传善李军明
Owner WEIFANG YAXING GRP CO LTD
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