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Polyolefin catalyst prepolymerization solvent or catalyst preparation solvent

A polyolefin catalyst and pre-polymerization technology, which is applied in the field of mixed alkane catalyst pre-polymerization solvent or catalyst preparation solvent, can solve problems such as difficult transportation and metering, unfavorable health and environmental protection, and excessive volatility, so as to reduce the loss of solvent , Eliminate potential safety hazards, reduce the effect of drying temperature

Inactive Publication Date: 2012-05-02
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the single components commonly used in the polyolefin industry, such as mineral oil and hexane, are difficult to meet the above requirements at the same time.
Commonly used mineral oil solvents have high viscosity, are not easy to transport, and have a low recovery rate. In addition, mineral oil is used as a catalyst solvent, and its viscosity will also change when the temperature changes. It must be heat traced, otherwise it is difficult to transport and measure
Mineral oil usually contains aromatic hydrocarbon impurities, and its production process and final product are not conducive to health and environmental protection
Hexane is difficult to volatilize and easy to transport, but it is not easy to remove from polyolefin resin or catalyst in the post-polyolefin process
[0003] Simple light alkanes, such as propane and butane, in the process of catalyst prepolymerization or catalyst preparation, due to their strong volatility and low flash point, the safety of operation is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Content of butane and its isomers 5%

[0039] Content of pentane and its isomers 94%

[0040] Density under 15.6℃ temperature test condition 0.620kg / m 3

[0041] Acidity <100μg / g

[0042] Other hydrocarbon mass percentage content <0.5%

[0043] Unsaturated hydrocarbon content <500μg / g

[0044] Water content <20μg / g

[0045] Sulfur content <100μg / g

[0046] Chroma <30

[0047] Non-volatile matter <0.001g / 100mL

[0048] Peroxide content <10μg / g

[0049] Benzene content <10μg / g

[0050] Suspended matter None

Embodiment 2

[0052] Content of butane and its isomers 20%

[0053] Content of pentane and its isomers 79%

[0054] Density under 15.6℃ temperature test condition 0.621kg / m 3

[0055] Acidity <50μg / g

[0056] Other hydrocarbon mass percentage content <0.5%

[0057] Unsaturated hydrocarbon content <500μg / g

[0058] Water content <20μg / g

[0059] Sulfur content <100μg / g

[0060]Chroma <30

[0061] Non-volatile matter <0.001g / 100mL

[0062] Peroxide content <10μg / g

[0063] Benzene content <10μg / g

[0064] Suspended matter None

Embodiment 3

[0066] Content of butane and its isomers 30%

[0067] Content of pentane and its isomers 69%

[0068] Density under 15.6℃ temperature test condition: 0.618kg / m 3

[0069] Acidity <100μg / g

[0070] Other hydrocarbon mass percentage content <0.5%

[0071] Unsaturated hydrocarbon content <500μg / g

[0072] Water content <20μg / g

[0073] Sulfur content <100μg / g

[0074] Chroma <30

[0075] Non-volatile matter <0.001g / 100mL

[0076] Peroxide content <10μg / g

[0077] Benzene content <10μg / g

[0078] Suspended matter None

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Abstract

The invention relates to a polyolefin catalyst prepolymerization solvent or a catalyst preparation solvent, which are applicable to a process for producing polyolefin and a process for preparing a catalyst of the polyolefin in the petrochemical industry. The invention discloses a novel mixed light alkane catalyst prepolymerization solvent or a catalyst preparation solvent which is prepared by utilizing C4-C5 straight-chain paraffin and an isomer thereof, taking butane, iso-butane, iso-pentane, n-pentane and cyclopentane as main ingredients, and limiting the concentration of the C4-C5 straight-chain paraffin and the isomer thereof. The two following conditions are needed to be met simultaneously when the solvent is prepared: the mass concentration of the butane and an isomeride of the butane is not more than 40 percent; and the mass concentration of pentane and an isomeride of the pentane is not less than 50 percent. The solvent has low viscosity and stable chemical properties, is easy to volatilize, and is used for substituting the traditional high-boiling-point or high-viscosity polyolefin prepolymerization solvent and catalyst preparation solvent in the prepolymerization process of catalysts in the polyolefin industry.

Description

technical field [0001] The invention relates to a novel mixed alkane catalyst prepolymerization solvent or catalyst preparation solvent in the polyolefin industry. Background technique [0002] The solvents used in catalyst prepolymerization or catalyst preparation used in the polyolefin industry require low viscosity, volatile, stable chemical properties, easy desorption, and non-toxic process conditions. At present, the single components commonly used in the polyolefin industry, such as mineral oil and hexane, are difficult to meet the above requirements at the same time. Commonly used mineral oil solvents have high viscosity, are not easy to transport, and have a low recovery rate. In addition, mineral oil is used as a catalyst solvent, and its viscosity will also change when the temperature changes. It must be heat traced, otherwise it is difficult to transport and measure. Mineral oil usually contains aromatic hydrocarbon impurities, and its production process and fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/00
Inventor 姜立良陈卓立曾芳勇陈玉龙
Owner CHINA PETROLEUM & CHEM CORP
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