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High-density oxidized polyethylene wax preparation device and method

A technology for oxidizing polyethylene wax and a preparation device, applied in the field of polyethylene wax preparation, can solve the problems of difficult oxidation, low production efficiency, long oxidation time, etc., and achieve the effects of ensuring product quality, high production efficiency, and complete cracking

Pending Publication Date: 2017-10-24
衡水毅美新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of preparing high-density oxidized polyethylene wax, due to the high-viscosity characteristics of high-density polyethylene wax, the existing preparation method is extremely difficult to oxidize, takes a long time to oxidize, consumes a lot of energy, and has low production efficiency. The production process produces a large amount of waste water, which has a great impact on the environment

Method used

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  • High-density oxidized polyethylene wax preparation device and method

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Effect test

preparation example Construction

[0040] The preparation method comprises the following process steps:

[0041] 1) Add polyethylene resin to the cracking device, that is, the screw cracking machine for cracking, set the cracking temperature of the main engine 1 to 200°C-490°C, and set the cracking temperature of the auxiliary machine 2 to 360°C-400°C. After cracking in the main machine 1 and auxiliary machine 2, the polyethylene resin can be cracked more thoroughly and fully to obtain polyethylene wax water; through the cracking of the main machine and auxiliary machine, high-density polyethylene wax water with relatively stable molecular weight and viscosity can be obtained.

[0042] 2) The polyethylene wax wax water is injected into the collecting tank 3 through the pipeline to remove the oligomers and then cooled down to ensure that the material entering the oxidation reaction kettle has higher purity and better quality of the final product.

[0043]3), the polyethylene wax wax water after cooling is discha...

Embodiment 1

[0048] 500 kilograms of viscosity is that the polyethylene wax wax water of 7500mpa.s joins oxidation reactor, keeps temperature to

[0049] 145°C, add peracetic acid, the amount of peracetic acid added is 0.05% to 0.1%. Stir evenly and heat up to 150°C to 155°C to let air in, and the air flow rate is 3000L / H. Pressurize the oxidation reaction kettle to 1.5mpa, take a sample after timing the reaction for 3 hours to obtain oxidized polyethylene wax water with an acid value of 15mgKOH / G, and obtain oxidized wax water with an acid value of 30mgKOH / G after 5 hours of reaction.

Embodiment 2

[0051] Add 500 kg of polyethylene wax water with a viscosity of 2500mpa.s into the oxidation reactor, keep the temperature at 145° C., and add peracetic acid in an amount of 0.05% to 0.1%. Stir evenly and raise the temperature to 150°C to 155°C to let air in, the air flow rate is 3000L / H, that is, the air flow rate per hour is 3000L. Pressurize the oxidation reaction kettle to 1.5mpa, take a sample after timing the reaction for 2 hours to obtain oxidized polyethylene wax water with an acid value of 15mgKOH / G, and obtain oxidized wax water with an acid value of 30mgKOH / G after 4 hours of reaction.

[0052] The method of the present invention sets different reaction times according to different performance requirements of desired products.

[0053] The invention adopts a screw-type cracking machine including a main engine and an auxiliary machine to crack the high-density polyethylene resin, and can well control the cracking temperature, molecular weight and viscosity.

[0054]...

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Abstract

The invention relates to a high-density oxidized polyethylene wax preparation device and method and belongs to the technical field of polyethylene wax preparation. The high-density oxidized polyethylene wax preparation device comprises a cracking device, a material collecting tank and an oxidizing reaction kettle, wherein the cracking device, the material collecting tank and the oxidizing reaction kettle are sequentially connected in series through pipelines, a feeding opening of the material collecting tank is connected with a discharging opening of the cracking device, a discharging opening of the material collecting tank is connected with a feeding opening of the oxidizing reaction kettle, and the cracking device is a screw type cracking machine. The preparation method comprises the following steps: 1) adding polyethylene resin into the cracking device to be cracked to obtain liquid polyethylene wax; 2) sending the liquid polyethylene wax into the material collecting tank, removing low polymer and cooling; 3) draining the cooled liquid polyethylene wax into the oxidizing reaction kettle to be oxidized; 4) obtaining oxidized liquid polyethylene wax after oxidizing reaction and tabletting the oxidized liquid polyethylene wax by a tabletting machine to obtain a product. The product obtained by the invention is high-density polyethylene wax having good quality, high yield and high purity.

Description

technical field [0001] The invention relates to a preparation device and method of high-density oxidized polyethylene wax, belonging to the technical field of polyethylene wax preparation. Background technique [0002] High-density polyethylene wax is a non-polar wax used as an external lubricant in plastic processing. High-density polyethylene wax is oxidized by oxygen or a mixed gas containing oxygen. Oxidized polyethylene wax is a kind of polar wax. In plastic processing, it can be used not only as a surface lubricant, but also as an internal lubricant, and is widely used in ink, paint, and textile processing. [0003] At present, the production of high-density oxidized polyethylene wax abroad is to obtain high-density polyethylene wax through synthesis and then oxidize it. However, the domestic production process of high-density polyethylene wax is not yet mature, which seriously restricts the production of high-density oxidized polyethylene wax. [0004] According to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/06C08F8/50C08F10/02
CPCC08F8/06C08F8/50C08F10/02
Inventor 张广辉
Owner 衡水毅美新材料科技有限公司
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