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Olefin polymerization catalyst composition and application method thereof

A technology of olefin polymerization and composition, which is applied in the field of olefin polymerization catalyst composition, can solve problems such as complex preparation methods, and achieve the effects of simple catalytic system, low environmental hazards, easy preparation and control

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalysts obtained by the above-mentioned patents generally have the disadvantage of relatively complicated preparation methods

Method used

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  • Olefin polymerization catalyst composition and application method thereof
  • Olefin polymerization catalyst composition and application method thereof
  • Olefin polymerization catalyst composition and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The synthesis of ligand A, ligand A is the ligand shown in formula I, wherein R 1 =R 2 =R 3 =R 4 =CH 3 .

[0029] The ligand preparation method is: in a dry reactor, add NaH (1.2g, 30mmol), 30ml of anhydrous tetrahydrofuran in a Schlenk tube, slowly add 3,5-dimethylpyrazole (2.8g, 30mmol ), release gas, stir for 30 minutes, add thionyl chloride (1ml, 15mmol), the brown-gray transparent reaction solution turns off-white, remove the ice-water bath, stir for 30 minutes at room temperature, add quinoline aldehyde (2.4g, 15mmol), Pyridine (1.2g, 15mmol), refluxed in an oil bath at 80°C for 6 hours, quenched with saturated aqueous sodium bicarbonate solution, extracted three times with ethyl acetate, and purified by column chromatography to obtain a white solid, Ligand A (3.5g, yield 71wt% ).

[0030] 1 H-NMR (δ, ppm, CDCl 3 , TMS): 8.8~7.4 (m, 6H, Quinoline-H), 8.7 (s, 1H, CH), 5.8 (s, 2H, Pyrazole-H), 2.23 (s, 6H, CH 3 ), 2.18(s, 6H, CH 3 ).

Embodiment 2

[0032] The synthesis of ligand B, ligand B is the ligand shown in formula I, wherein R 1 =R 2 =R 3 =R 4 =H.

[0033] The preparation method is the same as Ligand Synthesis Example 1, except that 3,5-dimethylpyrazole is replaced by pyrazole, and other conditions remain unchanged. Yield 74wt%. 1 H-NMR (δ, ppm, CDCl 3 , TMS): 8.8-7.3 (m, 12H, Quinoline-H and Pyrazole-H), 8.7 (s, 1H, CH).

[0034] Polymerization example

Embodiment 3

[0036]A 300mL stainless steel polymerization kettle is used. The autoclave was heated to 100°C, evacuated and replaced with nitrogen for several times, and then filled with ethylene until the pressure of ethylene was 2 MPa and cooled to room temperature. Then add dehydrated toluene at 70°C, and at the same time add 10 μmol of the ligand (ligand A), chromium chloride and methylaluminoxane (MAO) in Example 1. The total volume of the mixed solution is 100 mL, in which the ligand, The molar ratio of chromium chloride and methylaluminoxane is 1:1:200, that is, the amount of chromium chloride added is 10 μmol, the amount of methylaluminoxane added is 2 mmol, the reaction pressure is controlled at 2.0 MPa, and ethylene is introduced to carry out ethylene oligomerization reaction.

[0037] After the reaction was completed, the system was cooled to room temperature, the gas phase product was collected in a gas metering tank, and the liquid phase product was collected in an Erlenmeyer ...

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Abstract

The invention provides an olefin polymerization catalyst composition comprising a nitrogen-containing heterocyclic ligand compound as shown in formula I, a transition metal compound and a cocatalyst; and R1, R2, R3 and R4 can be independently selected from hydrogen, alkyl, or alkoxy. The invention also provides an application method of the catalyst composition, including olefin polymerization of olefins in the presence of the catalyst composition and an organic solvent in a reactor.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst composition and its use method, in particular to an olefin polymerization catalyst composition containing nitrogen heterocyclic ligands, and also relates to a use method of the catalyst composition in olefin polymerization. Background technique [0002] Ethylene oligomerization is one of the most important reactions in the olefin polymerization industry. Through oligomerization, cheap small molecule olefins can be transformed into products with high added value. Ethylene oligomerization product—linear α-olefin (LAO) is an important organic chemical raw material. For example, LAO C4-C8, as an important organic raw material and chemical intermediate, is mainly used in the production of high-quality polyethylene (PE). The linear low-density polyethylene (LLDPE) produced by the copolymerization of 1-hexene or 1-octene and ethylene can significantly improve the properties of PE, especially the mec...

Claims

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Application Information

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IPC IPC(8): B01J31/22C07C2/22C07C11/02C07C11/08
Inventor 吴红飞祁彦平王霄青张立超韩春卉刘珺栗同林郑明芳
Owner CHINA PETROLEUM & CHEM CORP
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