US 10,793,652 B2Granted

Solid PMAO composition and method for producing same

AssigneeTosoh Finechem Corporation

InventorsEiichi Kaji, Takeo Yamane

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Abstract

A method for producing a high-activity solid PMAO composition is provided, involving: (a) heating an aromatic hydrocarbon solution of TMAL and PMAO containing units having formula (I), and precipitating a solid PMAO composition containing PMAO and TMAL; (b) adding an aromatic hydrocarbon solution of TMAL and PMAO containing units represented by formula (I) to a solution containing the solid PMAO composition; and (c) heating the resulting solution, thereby precipitating a solid PMAO composition. In steps (b) and (c), at least 70% of the PMAO and TMAL in terms of aluminum precipitates. The median diameter d2 of the solid PMAO composition produced in (c) is greater than the median diameter d1 of the solid PMAO composition produced in (a). -[(Me)AlO]n— (I) In formula (I), n represents an integer of 10-50. An olefin polymerization catalyst using the solid PMAO composition and a method for producing an olefin polymer using this catalyst are also described.

Claims21

Dependent claims

A method for producing a solid PMAO composition, comprising:

(a) a step of heating an aromatic hydrocarbon solution (liquid PMAO composition A) containing a poly-methylaluminoxane containing a unit represented by a following general formula (I) (hereinafter sometimes referred to as PMAO) and trimethylaluminum (hereinafter sometimes referred to as TMAL) to precipitate a solid PMAO composition containing the PMAO and TMAL,
wherein a precipitation amount of the solid PMAO composition in the step (a) being 70% or more based on aluminum of the PMAO and TMAL contained in the liquid PMAO composition A;
(b) a step of adding an aromatic hydrocarbon solution (liquid PMAO composition B) containing a PMAO containing a unit represented by the following general formula (I) and TMAL to a solution containing the solid PMAO composition obtained in the step (a);
and
(c) a step of heating the solution obtained in the step (b) to precipitate a solid PMAO composition,
wherein a precipitation amount of the solid PMAO composition in the step (c) being 70% or more based on aluminum of the PMAO and TMAL contained in the liquid PMAO compositions A and B,
a median diameter d2 of the solid PMAO composition produced in the step (c) is larger than a median diameter d1 of the solid PMAO composition produced in the step (a), and a heating temperature in the step (c) is the same as or different from a heating temperature in the step (a);
[C1]
[(Me)AlO]n— (I)
In the formula, n represents an integer of 10 to 50.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/091,284Filed 4 Apr 2017
Priority: JP 2016-0761535 Apr 2016
Published: US 2019/0153127 A123 May 2019
Granted: 6 Oct 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

C08F 10/02
Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond: ethene
C08F 110/02
Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond: ethene
C07F 5/068
Compounds with Al linked to an element other than Al, C, H or halogen: preparation of alumoxanes
C08F 4/6592
Component covered by group C08F4/64 containing a transition metal-carbon bond: containing at least one cyclopentadienyl ring, condensed or not,…