Monotitanocene metal compound, olefin polymerization catalyst
A technology for the polymerization of metal compounds and olefins, applied in the field of olefin polymerization catalysts and monotitanocene metal compounds, can solve problems such as restricting the development of olefin catalysts, and achieve the effects of stable structure, long catalytic life and good thermal stability.
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[0034] The present invention also provides a method for preparing polyolefins, comprising: mixing and reacting olefins and olefin polymerization catalysts in an anhydrous and oxygen-free atmosphere to obtain polyolefins; the olefin polymerization catalysts include the above-mentioned single titanocene metal compound .
[0035] The olefins are olefins well-known to those skilled in the art, and there is no special limitation. In the present invention, α-olefins are preferred, and ethylene, 1-butene, 1-hexene, 1-octene and 1-octene are more preferred. - one or more of decenes.
[0036] The olefin polymerization catalyst preferably also includes an alkylaluminoxane; the molar ratio of the aluminum element in the alkylaluminoxane to the titanium element in the single titanocene compound is preferably (100-10000):1, more preferably (1000-8000): 1, more preferably (1000-6000): 1, more preferably (2000-4000): 1, most preferably 2000: 1; the alkyl aluminoxane is well known to those s...
Embodiment 1
[0045] Embodiment 1: the preparation of compound 2a
[0046] Under the condition of argon atmosphere and room temperature, a dichloromethane solution (10 mL) of 1-hydroxypyrene (0.49 g, 2.2 mmol) was added dropwise to cyclopentadienyl titanium trichloride (0.50 g, 2.2 mmol) in dichloromethane solution (10 mL), a dark red solution was obtained after 12 h of reaction, and the solvent was removed under reduced pressure to obtain a red solid powder with a yield of 80%.
[0047] Elemental analysis results, theoretical value, C, 62.88; H, 3.52; actual value, C, 62.80; H, 3.49. H NMR spectrum, 1 HNMR (CDCl 3 ):δ8.42-8.39(m,1H,Py-H),8.20-8.03(m,7H,Py-H),7.71-7.69(m,1H,Py-H),6.81(s,5H,Cp ). 13 C NMR (CDCl 3 ): δ133.4, 129.7, 128.3, 126.9, 126.6, 126.3, 126.0, 125.7, 124.9, 122.4, 116.9.
Embodiment 2
[0048] Embodiment 2: the preparation of compound 2b
[0049] Under the condition of argon atmosphere and room temperature, a dichloromethane solution (10 mL) of 1-hydroxypyrene (0.49 g, 2.2 mmol) was added dropwise to cyclopentadienyl titanium trichloride (0.50 g, 2.2 mmol) in dichloromethane solution (10 mL), a deep red solution was obtained after 12 h of reaction, and the solvent was removed under reduced pressure to obtain a red powder. Then dissolve the red powder in 10mL of ether, slowly add 0.83mL of 1.6M methyllithium hexane solution at -78°C, slowly rise to room temperature and react for 2h, filter to remove incompatible substances, and drain the filtrate to obtain Red powder, yield 62%.
[0050] Elemental analysis results, theoretical value, C, 69.41; H, 4.50; actual value, C, 69.51; H, 4.42.
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