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Spherical carriers for olefin polymerization catalyst and preparation method

A spherical carrier and olefin polymerization technology, applied in the field of magnesium-containing spherical carrier and its preparation, can solve the problems of complex preparation process, low cooling forming temperature, high melting temperature and the like

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation process, high melting temperature and low cooling forming temperature are required, which consumes a lot of energy, and the preparation process is complicated, requiring multiple reactors to be jointly prepared, and the obtained adduct has a wide particle size distribution.

Method used

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  • Spherical carriers for olefin polymerization catalyst and preparation method
  • Spherical carriers for olefin polymerization catalyst and preparation method
  • Spherical carriers for olefin polymerization catalyst and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A. Preparation of spherical carrier

[0036] In a 500mL reactor, add 7.2g of magnesium chloride, 180ml of white oil, and 82ml of ethanol in sequence, and heat up to 90°C while stirring. After constant temperature reaction for 1 hour, 24 ml of epichlorohydrin was added, the temperature was maintained for 0.5 hour, the liquid was filtered off, the solid was washed 5 times with hexane, and dried in vacuum to obtain a spherical magnesium-containing compound.

[0037] B. Preparation of spherical catalyst

[0038] Into a 300mL glass reaction bottle, add 100ml of titanium tetrachloride, cool to -20°C, add 8g of the above-mentioned spherical magnesium-containing composition, and heat up to 110°C. Add 1.5ml of diisobutyl phthalate during the heating process, filter off the liquid, wash twice with titanium tetrachloride, wash three times with hexane, and obtain a spherical catalyst after vacuum drying.

[0039] C. Propylene polymerization

[0040] In a 5L stainless steel autoc...

Embodiment 2

[0042] Preparation of the spherical carrier: the same as in Example 1 except that the reaction temperature is 100°C.

[0043] The preparation of the spherical catalyst and the polymerization of propylene are the same as in Example 1.

Embodiment 3

[0045] In a 500mL reaction kettle, add 10.5g of magnesium chloride, 180ml of white oil, and 120ml of ethanol in sequence, and raise the temperature to 85°C while stirring. After constant temperature reaction for 1 hour, 35 ml of epichlorohydrin was added, the temperature was maintained for 0.5 hour, the liquid was filtered off, the solid was washed 5 times with hexane, and vacuum-dried to obtain a spherical magnesium-containing compound.

[0046] The preparation of the spherical catalyst and the polymerization of propylene are the same as in Example 1.

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Abstract

The invention relates to spherical carriers for an olefin polymerization catalyst and a preparation method. Each spherical carrier comprises reaction products of the following components: (1) magnesium halide which is shown as the general formula MgX2, (2) alcohol compounds which are shown as the general formula ROH, and (3) ethylene oxide compounds which are shown as the general formula (I), wherein in the general formula (I), R2 and R3 are alkyls with a C1-C5 straight chain or branched chain; and hydrogen on the alkyls can be randomly substituted by a halogen atom. The spherical carriers have good particle shapes, adjustable particle sizes and narrow particle size distribution, and the preparation method is simple.

Description

technical field [0001] The invention relates to a magnesium-containing spherical carrier and a preparation method thereof. More specifically, it relates to a spherical carrier that can be used to prepare spherical catalysts for olefin polymerization, especially propylene polymerization or copolymerization, and a preparation method thereof. technical background [0002] Catalysts for olefin polymerization are mostly prepared by loading titanium halides on activated anhydrous magnesium chloride. Among them, one method used to prepare active magnesium chloride is to anhydrous α-MgCl 2 It reacts with alcohol to form an adduct, and then uses this adduct to support titanium halide to prepare the solid component of olefin polymerization catalyst. Such magnesium chloride alcoholates generally comprise a binary component of magnesium chloride and alcohol. Some of the alcoholates disclosed also include small amounts of water. Such alcoholates can be prepared by methods such as spr...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/02C08F10/06
Inventor 李威莅夏先知刘月祥张纪贵乔素珍赵瑾高平王新生谭扬张志会杨林娜段瑞林彭人琪
Owner CHINA PETROLEUM & CHEM CORP
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