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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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the catalysts obtained by the above-mentioned patents general

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
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Example Embodiment

[0027] Example 1

[0028] Synthesis of ligand A, ligand A is a ligand represented by formula I, where R 1 =R 2 =R 3 =R 4 =CH 3 .

[0029] The ligand preparation method is: in a dry reactor, such as adding NaH (1.2g, 30mmol), 30ml anhydrous tetrahydrofuran in a Schlenk tube, slowly adding 3,5-dimethylpyrazole (2.8g, 30mmol) in an ice water bath ), 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 quinolinal (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 with ethyl acetate three times, 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...

Example Embodiment

[0031] Example 2

[0032] Synthesis of ligand B, ligand B is a ligand represented by formula I, where R 1 =R 2 =R 3 =R 4 =H.

[0033] The preparation method is the same as that in Example 1 of ligand synthesis, except that 3,5-dimethylpyrazole is replaced with pyrazole, and other conditions remain unchanged. The yield was 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

Example Embodiment

[0035] Example 3

[0036] Use 300mL stainless steel polymerizer. The autoclave was heated to 100°C, evacuated and replaced with nitrogen several times, and then filled with ethylene until the ethylene pressure was 2MPa, and the temperature was lowered to room temperature. Then add dehydrated toluene at 70°C, and add 10 μmol of the ligand (ligand A), chromium chloride and methylaluminoxane (MAO) in Example 1 at the same time. The total volume of the mixture 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 10μmol, the amount of methylaluminoxane added is 2mmol, the reaction pressure is controlled to 2.0MPa, and ethylene is introduced to carry out ethylene. Oligomerization reaction.

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

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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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