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Method of polymerization

A polymerization method and compound technology, applied in the field of polyolefin production, can solve the problems of low catalytic activity of hydroxyquinoline catalyst and the like

Inactive Publication Date: 2002-05-29
UNIVATION TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, the reports of Jordan et al. on hydroxyquinoline-based polyolefin catalysts (Bei, X.; Swenson, D.C.; Jordan, R.F., Organometallic Compounds 1997, 16, 3282) have aroused interest in recent years, although Jordan The catalytic activity of the hydroxyquinoline catalyst is low

Method used

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  • Method of polymerization

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preparation example Construction

[0051] In a preferred embodiment, the present invention relates to a method for the preparation of a metal compound comprising: neutralizing a neutral complex at about 20°C or higher, preferably from about 20 to about 100°C, in a non-coordinating or weakly coordinating solvent Body and M n x n The indicated compound is reacted; then the mixture is treated with an excess of alkylating agent; then the metal complex is recovered; wherein M is the metal of Group 3-14, n is the oxidation state of M, and X is an anion leaving group. In a preferred embodiment, the solvent has a boiling point above 60°C, such as diethyl ether, toluene, xylene, benzene, methylene chloride and / or hexane.

[0052] In addition, the present invention also relates to a method for preparing a metal adduct, comprising: making a neutral ligand and m n x n Reaction of the compound represented; where M is Zr or Hf, n is the oxidation state of M, X is an anion leaving group, and then removes the metal adduct....

Embodiment 1

[0100] Embodiment 1: the preparation of catalyst A

[0101] [iPrNH(o-C 6 h 4 )] 2 Preparation of O

[0102] Add [H 2 N(o-C 6 h 4 )] 2 O (10.0 g, 50 mmol), acetone (15 mL), activated Zn powder (25.0 g, 382 mmol) and glacial acetic acid (100 mL). The flask was capped with a rubber septum, connected by a needle to an oil bubbler, and then heated to 60° C. for 24 hours with rapid stirring. After cooling to room temperature, the reaction mixture was poured into ice (200 mL), concentrated aqueous ammonia (200 mL), and dichloromethane (150 mL). The layers were separated and the aqueous layer was extracted with dichloromethane (2 x 100 mL). The combined dichloromethane layers were extracted over magnesium sulfate. After removal of the dichloromethane under vacuum, the crude product was obtained as an orange oil. The resulting oil was dissolved in acetone (150 mL) and concentrated hydrochloric acid (10 mL) was added. Colorless crystals will begin to form within one minute. ...

Embodiment 2

[0112] Example 2: Slurry Phase Ethylene-Hexene Polymerization

[0113] Slurry phase polymerizations were carried out in a 1-liter high-pressure reactor equipped with a mechanical stirrer, external water jacket for temperature control, bulkhead inlet and vent lines, and regulation of anhydrous nitrogen and ethylene source of supply. The reactor was dried and degassed at 160°C. Isobutane (400 mL) was added as diluent and, using a gas-tight syringe, 35 mL of 1-hexene was added as scavenger, and 0.4 mL of a 25% by weight solution of triisobutylaluminum in hexane. The reactor was heated to 60°C. 0.256 g of finished Catalyst A was added using ethylene pressure and the reactor was pressurized with 79 psi (545 kPa) of ethylene. The polymerization was continued for 30 minutes while maintaining the temperature and pressure of the reactor at 60°C and 79 psi (545 kPa) by a constant flow of ethylene. The reaction was quenched by rapid cooling and evacuation. No polymer was recovered. ...

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Abstract

This invention relates to a composition of matter represented by the formula below, and to a polymerization process comprising combining an olefin in the gas or slurry phase with an activator, a support and a compound represented by the following formula: wherein M is a group 3 to 14 metal, each X is independently an anionic leaving group, n is the oxidation state of M, m is the formal charge of the YZL ligand, Y is a group 15 element, Z is a group 15 element, L is a group 15 or 16 element, R 1 and R 2 are independently a C 1 to C 20 hydrocarbon group, a heteroatom containing group, silicon, germanium, tin, lead, phosphorus, a halogen, R 1 and R 2 may also be interconnected to each other, R 3 is absent, or is hydrogen, a group 14 atom containing group, a halogen, a heteroatom containing group, R 4 and R 5 are independently an aryl group, a substituted aryl group, a cyclic alkyl group, a substituted cyclic alkyl group, or multiple ring system, R 6 and R 7 are independently absent or hydrogen, halogen, a heteroatom or a hydrocarbyl group, or a heteroatom containing group.

Description

field of invention [0001] The present invention relates to olefin polymerization catalysts comprising metal atoms bonded to at least two Group 15 atoms and their use in the gas phase or slurry phase for the production of polyolefins. Background of the invention [0002] The in-depth commercialization of metallocene polyolefin catalysts (metallocenes are transition metal catalyst compounds based on cyclopentadienyl groups) has led to widespread interest in non-metallocene, homogeneous catalysts, especially for economical gas-phase and liquid Phase polymerization method used. When new non-metallocene catalysts in the gas or slurry phase can provide easier, more economical routes to currently available products and can also provide products and processes that exceed the capabilities of metallocene catalysts in the gas or slurry phase When possible, the field will be more than just academic research. [0003] Anionic, multidentate heteroatom ligands have received the greatest ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C07C211/65C07C217/90C07F7/00C08F2/00C08F2/18C08F2/34C08F4/06C08F4/44C08F4/642C08F4/645C08F4/659C08F10/00C08F210/00C08F210/16
CPCC08F210/16C08F10/00Y10S526/903C07C211/65C08F4/64148C08F4/659C08F210/14C08F4/7004C08F4/64141
Inventor D·H·麦克康维勒R·R·施洛克
Owner UNIVATION TECH LLC
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