Method for producing high-performance rubber type chlorinated polyethylene by water-phase method

A technology of chlorinated polyethylene and production method, which is applied to the production method of rubber-type chlorinated polyethylene in water and the field of recycling waste water generated in the production process, can solve the problem of unstable product quality, direct discharge of waste water, and large amount of waste water discharged. and other problems, to achieve the effect of broadening the use, shortening the time and saving energy

Inactive Publication Date: 2008-09-10
江苏天腾化工有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly two production methods for high-performance rubber-type chlorinated polyethylene. One is the acid phase method: this method requires high equipment requirements, large investment, and high reaction pressure; it consumes a lot of power, high production costs, and a large amount of wastewater discharge.
The 2nd, water-phase method: such as Chinese patent application (patent application number: 02135472.3) the water-phase suspension preparation method of rubber-type chlorinated polyethylene, though this method can produce common rubber-type chlorinated polyethylene, but the product batch of this method production Small, unstable product quality, low production efficiency, direct discharge of waste water, recycling without treatment, causing serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 20000kg softened hot water (80-90℃), 60kg dispersant polysodium methacrylate, 25kg talcum powder, 7.5kg emulsifier alkylphenol and ethylene oxide condensate to the 26000L batching tank, start stirring for 10 minutes , add 2000kg polyethylene powder (melt index is 1.0g / 10min), after emulsifying for 40 minutes, send it into the chlorination kettle with a slurry pump, make up hot water to make the total amount 22000kg, and wash the kettle wall, add 2kg to trigger agents dibenzoyl peroxide and dicumyl peroxide. After sealing the reactor, heat it up, open the chlorine system and mass flow meter at the same time, and feed chlorine gas into the reactor to carry out the chlorination reaction. The distribution is as follows:

[0023] 75-110°C Chlorine flow 720kg, accounting for 30% of the total chlorine flow 800kg / h, time 55 minutes; pressure 0.2Mpa;

[0024] 110-125°C chlorine flow 720kg, accounting for 30% of the total chlorine flow 1000kg / h, time 43 minutes; pressure 0.3...

Embodiment 2

[0029] Add 20,000kg of softened hot water (80-90°C), 60kg of dispersant sodium polymethacrylate, 25kg of talcum powder, 7.5kg of emulsifier alkylphenol and ethylene oxide condensate into a 26,000L batching tank, and start stirring for 10 minutes , add 2000kg polyethylene powder [melt index (MI) 5kg 1.8g / 10min] and emulsify for 40 minutes, send it into the chlorination kettle with a slurry pump, make up hot water to make the total amount 22000kg, and rinse the wall of the kettle, add 2kg initiator dibenzoyl peroxide and dicumyl peroxide. After sealing the reactor, heat it up, open the chlorine system and mass flow meter at the same time, and feed chlorine gas into the reactor to carry out the chlorination reaction. The distribution is as follows:

[0030] At 75-115°C, the chlorine flow rate is 720kg, accounting for 30% of the total chlorine flow, the flow rate is 800kg / h, and the time is 54 minutes; the pressure is 0.20Mpa;

[0031] 115-125°C Chlorine flow 840kg, accounting fo...

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Abstract

The invention discloses a manufacturing method for high-performance rubber-type chlorinated polyethylene with the water-phase method. The manufacturing method comprises the following steps of: softening hot water, dispersing agent, emulsifying agent and polyethylene powder are added in a proportioning tank in turn and are stirred to form suspension feed liquid, then completing discharging; the suspension feed liquid in the proportioning tank is fed in a chlorination reaction kettle, and then initiator is added; when the mixture is heated to 75 DEG C under a sealed condition, chlorine gas is pumped into the reaction kettle, thereby obtaining the mother liquor of rubber-type chlorinated polyethylene after 2 to 3 hour reaction under 75 to 140 DEG C and pressure less than or equal to 0.45MPa; and the mother liquor is fed to a rinsing kettle to be filtered and then is neutralized through a neutralization kettle, and is made into a high-performance rubber-type chlorinated polyethylene finished product after washing, dehydration and drying. The manufacturing method has high production efficiency and stable product quality and can realize the recycling of waste water after treatment.

Description

technical field [0001] The invention relates to a production method of rubber-type chlorinated polyethylene, in particular to a water-phase production method of rubber-type chlorinated polyethylene and recycling of waste water generated in the production process. technical background [0002] High-performance water-based rubber-type chlorinated polyethylene has the characteristics of oil resistance, aging resistance, corrosion resistance, and flame retardancy. It can be used not only as an excellent modifier for engineering plastics, but also as a substitute for natural rubber and synthetic rubber; it has a wide range of uses, mainly used for wires and cables, sheaths and insulated wires, automotive hoses and chemical hoses, and mining conveyor belts and special rubber products. [0003] At present, there are mainly two production methods for high-performance rubber-type chlorinated polyethylene. One is the acid phase method: this method requires high equipment requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/02C08F8/22
Inventor 黄昌瑞陈小强缪汉叶黄天澄袁理伟
Owner 江苏天腾化工有限公司
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