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Method for preparing chlorosulfonated polyethylene by using rotary reactor

The technology of chlorosulfonated polyethylene and chlorinated polyethylene is applied in the field of preparation of chlorosulfonated polyethylene, which can solve the problems of high production cost, equipment corrosion, material scorch and discoloration, etc., and achieve the effect of high product performance and stable quality.

Pending Publication Date: 2016-08-17
于涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned problems in the prior art, the present invention aims to provide a method for preparing chlorosulfonated polyethylene by gas-solid phase reaction using a rotary reactor, in order to solve the problem of scorch and discoloration of materials in the existing CSM production process. Severe corrosion and high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing chlorosulfonated polyethylene in a rotary reactor, using a gas-solid phase reaction in a rotary reactor to prepare chlorosulfonated polyethylene, comprising the following steps:

[0029] (1) Choose chlorinated polyethylene powder with Mooney viscosity ML100°C 1+4 65; volatile matter 0.18wt%; chlorine content 32.7wt% chlorinated polyethylene powder, pass through a 30-mesh sieve, take 25.0Kg, and place it in a 150L steel-lined fluoroplastic rotary Inside the reactor (the rotary reactor is composed of a drum, a bracket, a vacuum ventilation system and a sealing system, the drum of the rotary reactor is provided with a baffle, and the inner wall of the drum and the baffle are made of steel-lined fluoroplastic, rotating Type reactor outside is provided with jacket), adds 1Kg calcium carboxylate.

[0030](2) Feed sulfur dioxide gas into a 10000L steel pressure vessel with a pressure resistance of 0.6MPa until the pressure is 0.25MPa, then feed chlorine ...

Embodiment 2

[0042] A method for preparing chlorosulfonated polyethylene in a rotary reactor, using a gas-solid phase reaction in a rotary reactor to prepare chlorosulfonated polyethylene, comprising the following steps:

[0043] (1) Choose Mooney viscosity ML100 ℃ 1+4 45; volatile matter 0.5wt%; chlorinated polyethylene powder with chlorine content 25wt%, pass 20 mesh sieves, get 150Kg, add calcium carboxylate 4Kg, precipitated white carbon black 0.1Kg, placed in a 500L steel-lined fluoroplastic rotary reactor (the rotary reactor is composed of a drum, a bracket, a vacuum ventilation system and a sealing system, the drum of the rotary reactor is equipped with a baffle, and the inner wall of the drum and baffles are made of steel-lined fluoroplastics, and a jacket is provided outside the rotary reactor),

[0044] (2) Feed sulfur dioxide gas into a 10000L steel pressure vessel with a pressure resistance of 0.6MPa until the pressure is 0.25MPa, then feed chlorine gas to raise the pressure to...

Embodiment 3

[0050] A method for preparing chlorosulfonated polyethylene in a rotary reactor, using a gas-solid phase reaction in a rotary reactor to prepare chlorosulfonated polyethylene, comprising the following steps:

[0051] (1) Choose Mooney viscosity ML100 ℃ 1+4 82; Chlorine content 33wt%; Volatile matter 0.3wt% chlorinated polyethylene powder, cross 30 mesh sieves, get 150Kg, add calcium carboxylate 3Kg, superfine talcum powder 1Kg , placed in a 500L steel-lined fluoroplastic rotary reactor (the rotary reactor is composed of a drum, a bracket, a vacuum ventilation system and a sealing system, the drum of the rotary reactor is equipped with a baffle, the inner wall of the drum and the baffle The material of the plate is steel-lined fluoroplastic, and a jacket is arranged outside the rotary reactor),

[0052] (2) Feed sulfur dioxide gas into a 10000L steel pressure vessel with a pressure resistance of 0.6MPa until the pressure is 0.25MPa, then feed chlorine gas to raise the pressure ...

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Abstract

The invention belongs to the field of preparation of chlorosulfonated polyethylene, and in particular relates to a method for preparing chlorosulfonated polyethylene in a rotary reactor, which comprises adding chlorinated polyethylene powder and an anti-caking agent into the drum of the rotary reactor, The amount of anti-adhesive agent is 2-8% of the mass of chlorinated polyethylene powder; start the drum of the rotary reactor, fill it with hot nitrogen after vacuuming, then release the pressure, repeat the above operation several times; after vacuuming Add the initiator, feed the mixed gas of chlorine and sulfur dioxide, control the speed of the mixed gas to react, and control the reaction temperature ≤ 80°C in the whole process; move the reaction product to purified water and wash it repeatedly until the pH of the washing water is > 6, and then put The material was vacuum filtered and dried to obtain chlorosulfonated polyethylene powder. The invention can effectively solve the problems of scorching and discoloration of materials, serious equipment corrosion and high production cost in the existing CSM production process.

Description

technical field [0001] The invention belongs to the field of preparation of chlorosulfonated polyethylene, and in particular relates to a method for preparing chlorosulfonated polyethylene in a rotary reactor. Background technique [0002] Chlorosulfonated polyethylene (hereinafter referred to as CSM) is a special synthetic rubber obtained by chlorination and chlorosulfonation of polyethylene. Due to the saturation of the structure and the presence of chlorosulfonyl groups, it has good crosslinkability, and the weather resistance, ozone resistance, oil resistance, chemical resistance, abrasion resistance, radiation resistance and flame retardancy of the vulcanized rubber It is widely used in automotive rubber parts, flame retardant wires and cables, roof waterproofing and rubber dams, chemical equipment anti-corrosion linings, shoemaking and coatings and other fields. [0003] The production methods of chlorosulfonated polyethylene include solvent method and gas-solid phase...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F8/38
CPCC08F8/38
Inventor 白杰
Owner 于涛
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