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Spherical catalyst for 1-butene polymerization as well as preparation method and application thereof

A technology for butene polymerization and catalyst is applied in the field of spherical catalyst and its preparation, and achieves the effects of improving processability, saving cost and improving performance

Active Publication Date: 2012-07-25
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of pressure resistance (also known as burst resistance), sometimes there are still unsatisfactory

Method used

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  • Spherical catalyst for 1-butene polymerization as well as preparation method and application thereof
  • Spherical catalyst for 1-butene polymerization as well as preparation method and application thereof
  • Spherical catalyst for 1-butene polymerization as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Preparation of magnesium chloride spherical carrier

[0055] In a 250ml glass reactor equipped with a reflux condenser, a mechanical stirrer and a thermometer, and fully replaced by high-purity argon, add 18.3ml of dehydrated alcohol, 10.6g of anhydrous magnesium chloride (molar ratio dehydrated alcohol: anhydrous magnesium chloride =2.8:1, heat up under stirring, add 60ml of inert solvent (a mixture of methyl silicone oil and liquid paraffin in a volume ratio of 1:1) after the magnesium chloride is completely dissolved, stir to disperse and emulsify it for 15min (pre-dispersion), and the stirring speed is 600rpm, and maintain the temperature at 120°C. In another reactor with a mechanical stirrer with a volume of 250ml, first add 60ml of inert solvent (identical to the composition of the above inert solvent), preheat to 120°C, and prepare the above-mentioned The mixture was quickly transferred to the second reactor, maintained at a temperature of 120°C, and stirred ...

Embodiment 2 and Embodiment 3

[0061] Change the molar ratio of absolute ethanol to magnesium chloride in the preparation of magnesium chloride alcoholate in Example 1 to 3.5:1 and 6:1, and other conditions and methods are the same as in Example 1. The composition of the magnesium chloride alcoholate carrier is MgCl 2 2.56C 2 h 5 OH and MgCl 2 2.67C 2 h 5 OH, the percentages of titanium and ester in the catalyst are respectively Ti=2.21%, ester=3.72% and Ti=2.87%, ester=4.23%, and the specific surface area is 256m 2 / g and 224m 2 / g. Liquid-phase butene-1 bulk polymerization is the same as in Example 1, and the results are listed in Table 1.

Embodiment 4

[0063] Change the final dispersion speed in the preparation of magnesium chloride alcoholate in embodiment 1 to 1000rpm, and other conditions and methods are all the same as in embodiment 1. The composition of the magnesium chloride alcoholate carrier is MgCl 2 2.32C 2 h 5 OH, Ti in the catalyst = 1.91%, ester 4.50%, specific surface area 249m 2 / g. Liquid-phase butene-1 bulk polymerization is the same as in Example 1, and the results are listed in Table 1.

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Abstract

The invention relates to polymerization of 1-butene, in particular to a spherical catalyst of polybutylene-1. The catalyst consists of a carrier, an active component and a modifier, wherein the active component is titanium tetrachloride, the carrier is a magnesium chloride spherical carrier and the modifier is an electron donor compound; and the catalyst comprises the major components in percentage by mass of: 1.1-4.5% of Ti and 0.15-12.37% of electron donors. The spherical catalyst suitable for butane-1 polymerization solves the problems that the activity of the general catalyst is low, the normality of polymer is difficult to control, and the molecular weight of the polymer and the molecular weight distribution are difficult to control. The obtained polybutylene polymer has very high steric regularity, the normality of polybutylene is as high as 99%, the crystallinity of the polybutylene-1 polymer is greater than 60% and the fusion point is 130.5 DEG C. The invention can simplify the polymerizing process and save the production cost.

Description

technical field [0001] The invention relates to 1-butene polymerization, in particular to a spherical catalyst for 1-butene polymerization, a preparation method and application thereof. technical background [0002] As we all know, there are two commonly used preparation methods for high-efficiency supported catalysts for olefin polymerization. A method is to make magnesium chloride dissolved in alcohol (CN85100997) or the mixed solution (CN1091748A) of organic epoxy compound and organic phosphorus compound to become a homogeneous solution, then the homogeneous solution is reacted with low-temperature titanium tetrachloride and electron donor, By raising the temperature, the solid catalyst component containing the active center is re-precipitated. Although this kind of catalyst has high activity and high orientation ability for olefin polymerization, because the catalyst particles are prepared by precipitation, the catalyst particle size is small, and it is difficult to sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/08C08F4/646C08F4/649C08F4/654C08F4/02
Inventor 刘宾元任合刚杨敏任笑飞白鹏吴之禄王延吉
Owner HEBEI UNIV OF TECH
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