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Preparation method for producing oxidized polyethylene through polyethylene oligomer

A technology for oxidizing polyethylene and oligomers, which is applied in the field of polyethylene production, can solve the problems of the oxidation efficiency and quality of polyethylene oligomers, and reduce the oxygen concentration, so as to ensure the oxidation quality and efficiency, ensure the oxygen concentration, and ensure the The effect of seal quality

Active Publication Date: 2017-10-10
扬州罗兰新材料有限公司
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Problems solved by technology

[0003] The existing polyethylene oxidation process is generally carried out under certain conditions in an oxygen atmosphere. Due to various factors, other gases are inevitably mixed in the reaction process, thus reducing the oxygen concentration and making polyethylene oligomerization The oxidation efficiency and quality of the product are greatly reduced, so it needs to be further improved

Method used

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Embodiment Construction

[0018] The present invention carries out according to the following steps:

[0019] 1) First heat and melt the polyethylene oligomer;

[0020] 2) Heating at high temperature in the reactor to remove the light component through negative pressure device, the molecular weight is within 400, the temperature is controlled at 180-220°C, and the time is 2-6 hours;

[0021] 4) Raise the temperature of the reaction kettle to 240°C, then slowly add the catalyst into the reaction kettle, and stir while heating until the mixture is uniform;

[0022] 5) Put the catalyst-added raw materials into the preheated reactor, start the compressor to pump oxygen-containing gas into the reactor, and turn off the compressor after the reaction time is 4-6 hours after the oxidation is completed.

[0023] Other gases in the oxygen-containing gas are gases with a density lower than that of oxygen.

[0024] The other gases are inert gases.

[0025] Inject oxygen-containing gas in the following manner, t...

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Abstract

The invention relates to a preparation method for producing oxidized polyethylene through polyethylene oligomer. The method is implemented through the following steps of 1) heating to melting the polyethylene oligomer; 2) performing high-temperature heating in a reactor, extracting light components through a negative pressure device, controlling the molecular weight to be within 400, the temperature to be 180-220 DEG C and the reacting time to be 2-6 hours; 4) heating the reactor to 240 DEG C, slowly adding in catalysts while heating and stirring until materials are uniformly mixed; 5) adding the materials mixed with the catalysts into the preheated reactor, starting a compressor to fill oxygen-containing gas into the reactor for oxidation for 4-6 hours, and then closing the compressor. The preparation method for producing the oxidized polyethylene through polyethylene oligomer can further improve the oxidation quality and efficiency.

Description

technical field [0001] The invention relates to a preparation method for producing oxidized polyethylene by using polyethylene oligomers, and belongs to the technical field of polyethylene production. Background technique [0002] Polyethylene oligomer is a by-product of polyethylene production in petrochemical plants, which is a polymer composed of fewer repeating units. Its relative molecular mass is between small molecules and macromolecules. Generally refers to a polymer composed of 10-20 repeating units. Oligomers are different from high polymers in that they can dissolve, distill, and form crystalline or amorphous substances. The physical and chemical properties of the oligomer vary with the molecular weight, and it is an incompletely polymerized polymer. The oxidized wax produced by oxidation has high hardness, excellent emulsification performance and good gloss. [0003] The existing polyethylene oxidation process is generally carried out under certain conditions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/06C08F10/02
CPCC08F8/06C08F10/02
Inventor 朱建军罗琴
Owner 扬州罗兰新材料有限公司
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