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Preparation method of ethylene polymer

An ethylene polymer and ethylene technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve problems such as additive spillage and impact on film applications, achieve increased space-time yield, and improve heat removal capabilities , the effect of increasing the content

Active Publication Date: 2017-10-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the additives will inevitably involve the problem of overflow, which may affect the application of the film

Method used

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  • Preparation method of ethylene polymer
  • Preparation method of ethylene polymer
  • Preparation method of ethylene polymer

Examples

Experimental program
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Embodiment 1

[0080] In this embodiment, magnesium chloride-supported TiCl3 is used as the main catalyst (the feed rate of the main catalyst is 2.18 kg / h), and a Ziegler-Natta catalyst with triethylaluminum as the co-catalyst. Wherein, the molar ratio of the main catalyst and the co-catalyst is 3.11 in terms of Ti / Al. Reaction flow see figure 1 .

[0081] The mass flow rate of mixed liquid I is 1.8 t / h, accounting for 0.42% of the mass flow rate of stream II. In the mixed liquid I, the alkane isopentane content accounts for 50% by weight of the mixed liquid (the molar content is 49%), and the olefin content accounts for 50% by weight of the mixed liquid (the molar content is 51%). The content of 1-hexene accounts for 45.1% by weight of the mixed liquid (the molar content is 38.5%). Mixed liquid I also contained 200 ppm of triethylaluminum cocatalyst.

[0082] The superficial fluidization gas velocity in the reactor was 0.75 m / s. The pressure of the reactor was 2.1 MPa, and the temperat...

Embodiment 2

[0090] This embodiment adopts the TiCl supported by magnesium chloride 3 Main catalyst (feed amount of main catalyst 1.75kg / h), Ziegler-Natta catalyst with triethylaluminum as cocatalyst. Wherein, the molar ratio of the main catalyst and the co-catalyst is 3.11 in terms of Ti / Al. Reaction flow see figure 1 .

[0091] The mass flow rate of mixed liquid I is 1.3t / h, accounting for 0.30% of the mass flow rate of stream II. In the mixed liquid I, the alkane isopentane content accounts for 45% by weight of the mixed liquid (the molar content is 35%), and the olefin content accounts for 55% by weight of the mixed liquid (the molar content is 65%), wherein the ethylene content accounts for 45% by weight of the mixed liquid (the molar content is 65%). 8.8% by weight (mole content is 17.8%), 1-butene content accounts for 46.2% by weight of the mixed liquid) (molar content is 47.2%), also contains 180ppm triethylaluminum cocatalyst in the mixed liquid.

[0092] The superficial fluid...

Embodiment 3

[0100] This embodiment adopts the TiCl supported by magnesium chloride 3 It is a Ziegler-Natta catalyst (feed amount of the main catalyst is 2.03kg / h), and triethylaluminum is used as a cocatalyst. Wherein, the molar ratio of the main catalyst and the co-catalyst is 3.11 in terms of Ti / Al. Reaction flow see figure 1 .

[0101] The mass flow rate of mixed liquid I is 1.7t / h, accounting for 0.37% of the mass flow rate of stream II. In the mixed liquid I, the alkane n-hexane content accounts for 25% by weight of the mixed liquid (the molar content is 25%), and the olefin content accounts for 75% by weight of the mixed liquid (the molar content is 75%), wherein the ethylene content accounts for 7.8% by weight of the mixed liquid. % by weight (23.8% in molar content), the content of 1-octene accounts for 67.2% by weight (51.2% in molar content) of the mixed liquid, and the mixed liquid also contains 180ppm of triethylaluminum cocatalyst.

[0102] The superficial fluidization ga...

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Abstract

The invention relates to a preparation method of an ethylene polymer, and the method comprises the following steps: taking a mixed liquid I as a carrier flow to convey a main catalyst in a catalyst system into a reactor, wherein the mixed liquid I comprises alkane, alkene and a co-catalyst; adding supplementing alkene feedstock into a material flow II which outflows from the reactor to obtain a material flow III and dividing the material flow III into a material flow IIIa and a material flow IIIb, wherein the material flow IIIa and the material flow IIIb separately flow back to the lateral part and the bottom of the reactor; and performing polymerization in the reactor to obtain an ethylene polymer and performing discharging from the reactor. In the method, the alkene comprises alpha-alkene and ethylene, wherein the molar concentration ratio of the alpha-alkene and the ethylene is more than or equal to 1. The polymer prepared by the method has low haze and high self-adhesive property. The invention also relates to an application of the ethylene polymer prepared by the method which is provided by the invention to film products.

Description

technical field [0001] The present invention relates to a kind of preparation method of polymer, specifically, the present invention relates to a kind of preparation method of ethylene polymer and the application of ethylene copolymer and film product thereof. Background technique [0002] At present, biaxially oriented polypropylene film (BOPP) is the main product in the high-end packaging field because of its light weight, transparency, non-toxicity, moisture resistance and high mechanical strength. The new polyethylene biaxially oriented film (BOPE) shows more excellent performance than BOPP, with lighter weight, better transparency, gloss and printing effect. BOPE mainly has a 3-5 layer membrane structure, the most common is 3 layers, which are the outer base layer, the core base layer and the functional layer. The main component of the core layer is polyethylene (PE), and the addition of PE accounts for about 99% of the weight of the core layer. PE used in traditional...

Claims

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Application Information

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IPC IPC(8): C08F210/02C08F210/08C08F210/14C08F2/00B32B27/08B32B27/30
CPCB32B27/08B32B27/30C08F210/02C08F210/08C08F210/14C08F2/00
Inventor 管炳伟张洪波吴文清吴斌斌贾世敏孙洪霞崔宇辉陈美阳永荣王靖岱陈毓明胡晓波范小强韩国栋王晓丽王静魏文学张柯蒋斌波黄正梁王晓飞廖祖维
Owner CHINA PETROLEUM & CHEM CORP
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