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Process for the preparation of a catalyst component and components therefrom obtained

A catalyst and solid catalyst technology, applied in the field of catalyst components, can solve the problems of not being able to function as a solvent, changing the performance of catalyst components, and not being able to prepare them.

Active Publication Date: 2007-10-10
BASSELL POLIOLEFINE ITAL SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, certain donors cannot be used because they cannot function as solvents given their chemical structure
Second, catalyst components with high porosity cannot be prepared unless a large amount of donor is removed from the catalyst component or the catalyst is sequentially deposited on a porous inert support
However, this method is not feasible for greatly increasing the electron donor content in the catalyst component, because it will expose the catalyst component itself to extremely high amounts of highly reactive compounds (AlEt3), This will drastically change the performance of pre-formed catalyst components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-12

[0080] A series of catalyst components were formulated using different electron donating compounds (ED). Using spherical MgCl containing 25 wt% EtOH prepared as described above 2 (EtOH) adduct to prepare the catalyst, first follow the above steps with TiCl 4 Treatment to produce an intermediate which is then contacted with the specific ED compound employed in the feed ratios shown in Table 1 following the general procedure.

[0081]The catalysts thus prepared were then used in the copolymerization of ethylene carried out following the general procedure described above under the specific conditions shown in Table 2, which also contains data on the characteristics of the polymers.

Embodiment 13-14

[0083] The catalyst was prepared according to the same procedure as described in Examples 1-12 using AcOEt as the electron donor, except that the molar feed ratio ED / Ti was 8, 4 and 1, respectively. The catalysts thus prepared were then used in the copolymerization of ethylene carried out following the general procedure described above under the specific conditions shown in Table 4, which also contains data on the characteristics of the polymers.

Embodiment 15

[0085] The prepared solid intermediate was injected into an autoclave according to the general procedure and kept stirring in anhydrous hexane (solid concentration 40 g / L) at 30° C. under nitrogen atmosphere. The suspension was treated with an amount of a 10 wt% solution of triethylaluminum (TEA) in hexane such that the ratio TEA / solid = 0.5 wt / wt. Propylene was then slowly added in an amount equal to 0.7 times the initial amount of solids at a rate suitable to keep the temperature constant at 30°C. Polymerization was stopped after 30 minutes. The solid was washed 3 times with anhydrous hexane at 25°C, resuspended in hexane and treated with AcOEt as the ED compound following the general procedure except that the molar AcOEt / Ti feed ratio was 8. The characteristics of the catalyst components are reported in Table 3 and the results of the copolymerization in Table 4.

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Abstract

The invention provides a solid catalyst component for the polymeriztion of olefins comprising a Ti compound and an electron donor (ED) selected from alcohol, ketones, amines, amides, nitrites, alkoxysilanes, aliphatic ethers, and esters of aliphatic carboxylic acids supported on Mg dichloride in which the ED / Ti molar ratio ranges from 1.5 to 3.5 and the Mg / Ti molar ratio is higher than 5.5. The invention also provides a catalyst for the polymerization of olefins using the solid catalyst component and a process for the (co)polymerization of olefins CH2=CHR.

Description

[0001] This application is a divisional application of the invention patent application No. PCT / EP2004 / 005186 filed on May 7, 2004 entitled "Preparation method of catalyst components and components obtained therefrom", the original application entered the Chinese national phase and obtained The national application number is 200480014844.6. technical field [0002] The present invention relates to an alkene CH 2 = Process for the preparation of catalyst components for CHR polymerization, wherein R is hydrogen or a hydrocarbon group having 1 to 12 carbon atoms. Specifically, the present invention relates to a preparation method of a catalyst component supported on magnesium dichloride and comprising a Ti compound and an electron donor, and also relates to some catalyst components obtained thereby. These catalyst components, when converted into catalysts, are particularly suitable for the production of copolymers of ethylene and alpha-olefins, as they enable the homogeneous dis...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/654C08F4/649C08F4/645
CPCC08F210/16
Inventor G・莫里尼T・达尔奥科F・皮蒙特斯R・斯波托P・文琴齐G・瓦伊塔尔
Owner BASSELL POLIOLEFINE ITAL SRL
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