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Catalyst for the polymerization of olefins

A catalyst, solid catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as the lack of improvement in activity/stereospecificity

Active Publication Date: 2018-04-20
BASSELL POLIOLEFINE ITAL SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the applicant's attempts to demonstrate that when BiCl in the catalyst 3 No improvement in activity / stereospecificity was obtained when the use of α-β-β was associated with the presence of a benzoate ester as an internal donor

Method used

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  • Catalyst for the polymerization of olefins
  • Catalyst for the polymerization of olefins
  • Catalyst for the polymerization of olefins

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The preparation of solid catalyst component (i) can be carried out according to several methods.

[0042] According to one of these methods, the magnesium dichloride in anhydrous state, the titanium compound, the Bi compound and the internal electron donor compound are milled together under conditions in which the magnesium dichloride is activated. The product thus obtained can be treated with an excess of TiCl 4 processed one or more times. After this treatment, washings with hydrocarbon solvents are performed until the chloride ions are no longer detectable by standard techniques. According to another method, the product obtained by co-milling magnesium chloride, titanium compound, Bi compound and internal electron donor compound in anhydrous state is treated with halogenated hydrocarbons (for example, 1,2-dichloroethane, chlorobenzene, dichloro methane, etc.) for processing. The treatment is carried out for 1 to 4 hours at a temperature between 40°C and the boilin...

Embodiment

[0071] characterize

[0072] Determination of Mg and Ti

[0073] The Mg content and the Ti content in the solid catalyst component have been determined by inductively coupled plasma emission spectrometry on an "Accuris type I.C.P spectrometer (ARL company)".

[0074] The samples were prepared by weighing analytically 0.1÷0.3 g of catalyst together with 2 g of a 1 / 1 mixture of lithium metaborate / lithium tetraborate in a "Fluxy" platinum crucible. After adding a few drops of KI solution, insert the crucible into the special equipment "Claisse Fluxy" for full combustion. With 5% (v / v) HNO 3 Solution The residue was collected and then analyzed via ICP at the following wavelengths: Magnesium, 279.08 nm; Titanium, 368.52 nm.

[0075] Determination of Bi

[0076] The Bi content in the solid catalyst component has been determined by inductively coupled plasma emission spectrometry on an "Accuris type I.C.P spectrometer (ARL company)".

[0077] The sample passes at 200cm 3 Pre...

example 1～9 and comparative example C1～C9

[0109] Examples 1-9 and Comparative Examples C1-C9: Propylene Polymerization

[0110] The phthalate-based solid catalyst component of examples 1 to 9 passes through the spherical adduct MgCl 2 · pC 2 h 5 OH was prepared using the general method described above. The phthalate-based solid catalyst components used in Comparative Examples 1 to 9 were prepared according to the general procedure but did not contain BiCl 3 MgCl 2 · pC 2 h 5 OH for preparation. The compositions of the above components are shown in Tables 1 and 2 together with the associated properties associated with the polymerization of propylene carried out as described in the general procedure.

[0111] Table 1: Composition of solid catalyst components

[0112]

[0113] Table 2: Propylene Polymerization

[0114]

[0115]

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Abstract

A catalyst for the (co)polymerization of alpha-olefins comprising the product obtained by contacting: (i) a solid catalyst component comprising Ti, Mg, Cl, and an internal electron donor compound, wherein said solid catalyst component contains from 0.1 to 50%wt of Bi with respect to the total weight of said solid catalyst component; (ii) an alkyl aluminum compound and, (iii) at least one externalelectron donor compound having the general formula: (R1)a Si(OR2)b wherein R8 and R9 are independently selected among alkyl radicals with 1-8 carbon atoms and a is 0 or 1 and a+b=4.

Description

technical field [0001] The present disclosure relates to a catalyst for the (co)polymerization of olefins, especially propylene. The catalyst comprises a solid catalyst component containing Mg, Bi, Ti and halogen elements and at least one internal electron donor compound, an alkylaluminum compound as a cocatalyst, and an external donor compound with a specific chemical structure. The present disclosure further relates to the use of said catalyst in a process for the (co)polymerization of olefins, especially propylene. Background technique [0002] Catalyst components for polymerizing olefins (eg, ethylene and propylene) are generally known in the art and are of the Ziegler-Natta type. The first catalyst of this type widely used in the art is based on solid TiCl 3 On top of the application, the solid TiCl 3 By making TiCl 4 It can be obtained by reduction reaction with aluminum alkyl. The activity and stereospecificity of the catalyst are not so high that the polymer mus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F110/06C08F4/657
CPCC08F110/06C08F4/6545C08F4/651C08F2500/12C08F2500/15C08F4/657C08F4/6465C08F4/18B01J21/06B01J23/18C08F4/20C08F10/06C08F2800/20
Inventor F·皮艾默恩忒斯G·维塔勒D·利果里G·莫里尼
Owner BASSELL POLIOLEFINE ITAL SRL