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Transition metal catalyst of polymerized ethene agent, prepartion method and application

A catalyst and nickel halide technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems that limit the development of ethylene oligomerization industry, low activity, oligomerization Product selectivity is low

Active Publication Date: 2007-12-19
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the catalysts that have been reported have the disadvantages of low selectivity and low activity of oligomerization products, and most of the above-mentioned catalysts are protected or covered by foreign patents, which seriously limits the development of my country's ethylene oligomerization industry. Research and development have independent knowledge Property right of ethylene oligomerization catalyst imminent

Method used

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  • Transition metal catalyst of polymerized ethene agent, prepartion method and application
  • Transition metal catalyst of polymerized ethene agent, prepartion method and application
  • Transition metal catalyst of polymerized ethene agent, prepartion method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] 1. the preparation of catalyst 3a: 2-methoxy ethyl ether nickel bromide (0.123g, 0.35mmol) and corresponding phosphine-oxazoline ligand 2a (0.129g, 0.338mmol) were added in the Schlenk bottle, pumped Vacuum through N 2 After replacing three times, add treated dichloromethane (10ml), stir at room temperature for 3 hours, add n-hexane (20ml) after concentration, a red precipitate precipitates out, filter with Schlenk method, and vacuum dry to obtain complex 0.118g, 3a: Yield: 67.3%. IR(KBr): 2979; 1627(v C＝N ); 1480; 1435, 1377, 1345cm -1 . Elemental Analysis: C 22 h 20 Br 2 NNiOP: Calculated: C, 46.86; H, 3.58; N, 2.48. Test values: C, 47.10; H, 3.70; N, 2.46.

[0081] 2. Ethylene oligomerization: Dry the 250ml polymerization bottle equipped with a magnetic stirrer at 130°C for 6 hours continuously, vacuumize while it is hot and use N 2 Air replacement 3 times. Catalyst 3a (2.8 mg, 5 μmol) was added, followed by re-evacuation and replacement with ethylene twice...

Embodiment 2

[0083] 1. The preparation of catalyst 3a is the same as in Example 1.

[0084] 2. Ethylene oligomerization: Dry the 250ml polymerization bottle equipped with a magnetic stirrer at 130°C for 6 hours continuously, vacuumize while it is hot and use N 2 Air replacement 3 times. Catalyst 3a (2.8 mg, 5 μmol) and triphenylphosphine (2.6 mg, 10 μmol) were added, followed by evacuation and replacement with ethylene twice. Inject a certain amount of toluene (26.7ml) with a syringe, then add a toluene solution (1.54mol / L, 3.3ml) of methylaluminoxane (MAO) to make Al / Ni=1000, and keep 1atm at 25°C Ethylene pressure, stirring vigorously for 30 minutes. Neutralize the MAO with dilute hydrochloric acid at 0°C, take a small amount of toluene layer, dry it with anhydrous sodium sulfate, and measure the content and distribution of oligomers by gas chromatography. Oligomerization activity: 5.27×10 5 g(oligomer)·mol -1 (Ni)·h -1 ·atm -1 . Oligomer Distribution: C 4 : 88.90%; C 6 : 10.79...

Embodiment 3

[0086] 1. The preparation of catalyst 3a is the same as in Example 1.

[0087] 2. Ethylene oligomerization: Vacuumize a 1L stainless steel kettle equipped with a mechanical stirrer and a thermocouple, replace it with nitrogen for 3 times, and then replace it with ethylene for 2 times. After cooling to room temperature, add the toluene solution of catalyst 3a (11mg, 20μmol) and a certain amount of toluene in sequence, and finally add a certain amount of methylaluminoxane (1.54mol / L, 13ml) to make Al / Ni=1000, the amount of toluene The total volume is 150ml. The ethylene pressure was raised to 20 atm and stirred vigorously at 25°C for 30 minutes. Neutralize the MAO with dilute hydrochloric acid at 0°C, take a small amount of toluene layer, dry it with anhydrous sodium sulfate, and measure the content and distribution of oligomers by gas chromatography. Oligomerization activity: 5.74×10 5 g(oligomer)·mol -1 (Ni)·h -1 ·atm -1 . Oligomer distribution: C 4 : 78.90%; C 6 : 7....

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Abstract

The invention discloses a 2-(2-(diphenyl phosphine) phenyl) oxazoline nickel halogenide series complex. Said invention provides the structure formula of said complex and its preparation method. Said invention also provides catalyst composition containing said complex and its application in ethylene oligopolymerization. Said catalyst composition has higher ethylene oligopolymerization activity, and the obtained oligomer takes ethylene dimmer and trimer as main components.

Description

Technical field: [0001] The invention relates to a transition metal catalyst after ethylene oligomerization, in particular to a novel N-P bidentate ligand nickel complex catalyst and a preparation method thereof. The invention also relates to a catalyst composition comprising the novel N-P bidentate ligand nickel complex catalyst and its use for catalyzing ethylene oligomerization. Background technique: [0002] Ethylene oligomerization is an important means of preparing linear α-olefins in industry. Linear alpha-olefins can be used in the preparation of detergents, plasticizers, fine chemicals, and as comonomers for linear low density polyethylene. Therefore, the production of linear alpha-olefins has become an independent branch in the petrochemical industry. In recent years, the research on late transition metal olefin polymerization and oligomerization catalysts has developed rapidly (Angew. Chem. Int. Ed. 1999, 38, 428-447; Chem. Rev. 2000, 100, 1169-1203). In additi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/24C07C2/32
CPCY02P20/52
Inventor 栗同林孙文华唐秀波介素云张凌燕
Owner CHINA PETROLEUM & CHEM CORP
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