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Decolorizing adsorbent for polyolefin purification and preparation method thereof

A polyolefin and adsorbent technology, applied in the field of polyolefin decolorizer and its preparation, can solve the problems of obvious effect of aluminum, and achieve the effects of increasing macropores, prolonging service life, and inhibiting initial activity

Inactive Publication Date: 2017-04-05
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Japanese Patent Publication No. 2003-209613 provides a demetallization method using only silica gel as an adsorbent, but it is mainly effective in reducing aluminum

Method used

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  • Decolorizing adsorbent for polyolefin purification and preparation method thereof
  • Decolorizing adsorbent for polyolefin purification and preparation method thereof
  • Decolorizing adsorbent for polyolefin purification and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take ×-rho alumina, add 10% (based on the weight content of the final adsorbent) silica gel and 5% metal-organic framework (MOF) promoter with a pore volume of 1.0ml / g, and then use conventional rotation to form a ball The method is to put it into a closed container after being formed, and keep it healthy for 80 hours in the presence of water vapor at 160°C. The ×-ρ alumina is basically converted into alumina monohydrate. After 5 hours, the adsorbent of the present invention was obtained.

[0026]

Embodiment 2

[0028] 10% metal-organic framework (MOF) promoter was added, and other conditions were the same as in Example 1.

[0029]

Embodiment 3

[0031] Add 1% metal-organic framework (MOF) accelerator, and other conditions are the same as in Example 1.

[0032]

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PUM

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Abstract

The invention discloses a decolorizing adsorbent used for purification of polyolefin and a preparation method thereof. The decolorizing adsorbent used for purification of polyolefin uses gamma-alumina as a carrier and comprises, by weight, 0.5% to 30% of macroporous silica gel and 0.5% to 10% of metal organic framework (MOF) accelerator. The decolorizing adsorbent is applicable to purification of polyolefin, removal of acidic gases like CO2, H2S, HCl and NO2 and removal of metals and compounds thereof in gasoline, diesel and residual oil. The decolorizing adsorbent provided by the invention has the advantages of moderate adsorption activity, high stability and weak and uniformly-distributed acidity on the surface of the decolorizing adsorbent, and can effectively and easily remove metals from a solution containing polyolefin, especially the metallic components such as titanium, vanadium, zirconium and aluminum from catalysts.

Description

technical field [0001] The invention relates to a polyolefin decolorizer and a preparation method thereof. Specifically, it is an adsorbent for adsorbing metal compounds in polyolefin and a preparation method thereof. Background technique [0002] The polyolefin production process generally uses titanium-based, vanadium-based, alkylaluminum and their mixtures as polymerization catalysts. Among them, the titanium-based catalyst is based on Ti(OR) a x b form, the vanadium-based catalyst is V(OR) a x b Form exists, and aluminum exists in the form of alkyl aluminoxane (RAO). With the completion of the reaction, these active metal compounds themselves also enter the polyolefin, which not only brings metal residue pollution, but also affects the color of the product, and also produces "stains" when forming a film And other issues. In addition, the presence of these metal compounds can cause corrosion of equipment during the steps of recovering unreacted monomer and solvent. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C08F6/08
Inventor 唐博合金张炜高艺茏吴建祥谭月月门勇杨锡铎郑新萌
Owner SHANGHAI UNIV OF ENG SCI
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