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Catalyst activity component for polymerization of propylene or combined polymerization, catalyst precursor containing the same and preparation thereof

An active component, propylene polymerization technology, applied in the production of bulk chemicals, etc., can solve the problem that the metal active center is not modified or the modification is not strong

Active Publication Date: 2009-04-22
BEIJING JINDINGKE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013]Chemical modification of the support by adding a suitable internal electron donor can indeed improve the morphology of the catalyst, but only the support can be modified, and there is no effect on the metal active center. Modified or less modified

Method used

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  • Catalyst activity component for polymerization of propylene or combined polymerization, catalyst precursor containing the same and preparation thereof
  • Catalyst activity component for polymerization of propylene or combined polymerization, catalyst precursor containing the same and preparation thereof
  • Catalyst activity component for polymerization of propylene or combined polymerization, catalyst precursor containing the same and preparation thereof

Examples

Experimental program
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Effect test

preparation example 1～18

[0114] Preparation of magnesium composite support

[0115] Under a nitrogen atmosphere, 8 grams of magnesium powder (150 μm) and 360 mL of hexane solvent were added to the reactor, and then 5.0 grams of Davison955 silica gel (produced by Grace, USA), 36 mL of n-chlorobutane, 20 mL of Si(OC 2 h 5 ) 4 , 5mL Ti(OC 4 h 9 ) 4 and 0.4 g I 2 Initiate at 60°C. After initiation, slowly add 110mL of n-chlorobutane and 140mL of hexane mixed solvent dropwise. After the dropwise addition, raise the temperature to 70°C for 2 hours to prepare the magnesium composite carrier.

[0116] Preparation of catalyst precursor

[0117] Place 4.76 grams of the prepared magnesium composite carrier in a reaction flask, add 50 mL of n-hexane, and sequentially add 3.1 mL of isooctyl alcohol (0.02 mol), 1.65 mL of γ-chloropropyltrimethoxysilane and 1.65 mL of γ -Chloropropyltriethoxysilane was heated to 50°C for 1 hour reaction, then 10ml of toluene solution containing 4.6mmol chelate coordination el...

preparation example 19

[0122] The catalyst precursor of the present invention was prepared by the same method as Preparation Example 1 except that the amount of α-acetylnaphthol was 2.3 mmol. The Ti content and Mg content of the prepared catalyst precursor were as follows: Ti mass %: 1.98; Mg mass %: 22.02.

preparation example 20

[0124] The catalyst precursor of the present invention was prepared by the same method as Preparation Example 1 except that the amount of α-acetylnaphthol was 6.9 mmol. The Ti content and Mg content of the prepared catalyst precursor were as follows: Ti mass %: 6.2; Mg mass %: 15.31.

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Abstract

The invention provides a catalyst active ingredient used for propylene polymerization or copolymerization, a catalyst precursor containing the active ingredient, and a preparation method thereof. The catalyst active ingredient comprises a magnesium compound, a titanium compound Ti(OR)4-nXn, a chelated corrdination type electron donor, a selectively added diester electron donor, a siliceous electron donor, organic alcohol R'OH and halogenated hydrocarbons, wherein X is halogen; R is alkyl; n is 0 or an integer which is less than or equal to 4; and R' is alkyl. The catalyst precursor provided by the invention has the advantages of solid particles, high catalytic activity, stable dynamic curve, strong copolymerization performance, high hydrogen regulation sensitivity and so on, and a polypropylene product prepared by utilizing the catalyst precursor has the advantages of good particle shape, uniform particle size distribution, high fusion index of polymers, high bulk density and a small quantity of powder.

Description

technical field [0001] The invention relates to a catalyst active component for propylene polymerization or copolymerization and a catalyst precursor comprising the active component and a preparation method thereof, in particular, the invention relates to a catalyst containing a chelating coordination type electron donor A catalyst active component for propylene polymerization or copolymerization, a catalyst precursor comprising the active component and a preparation method thereof. Background technique [0002] The requirements for catalysts for propylene polymerization or copolymerization are getting higher and higher. Not only are they required to have high catalytic activity, but they are also required to have long-term performance. More importantly, they are required to have good hydrogenation sensitivity, Strong copolymerization performance. At the same time, it is also required that the molecular weight and molecular weight distribution of the polymer produced by usi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/06C08F4/646
CPCY02P20/52
Inventor 徐江
Owner BEIJING JINDINGKE CHEM TECH
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