Catalytic system for preparing 6-C by di-propylene alkene
A catalytic system, six-carbon olefin technology, applied in the direction of hydrocarbons, hydrocarbons, physical/chemical process catalysts, etc., can solve the problems of complex systems, low activity, low activity, etc., and achieve cheap, easy-to-obtain and stable raw materials Good performance and wide application conditions
Inactive Publication Date: 2004-11-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
Since J. Ewersd first catalyzed the dimerization of propylene with the nickel acetylacetonate system in 1966, various 2,4-pentanedione nickel complex systems coordinated with oxygen and oxygen bidentate have also been widely used in the dimerization of propylene. Reaction, later the British B.P chemical company used the nickel acetylacetonate / tricyclohexylphosphine system to produce 2,3-dimethylbutene, and the selectivity of 2,3-dimethylbutene in hexacarbon olefins was 55-60%. But the activity is very low (15000h -1 ) (US 4835328; Chem. Britain 1990, 26, 400)
Japan's Sumitomo Corporation uses the nickel naphthenate / tricyclohexylphosphine system to catalyze the dimerization of propylene, the selectivity of 2,3-dimethylbutene reaches 80%, and the conditions are mild, but the activity is not high (up to 20000~60000h -1 ), and its system is more complicated, need to add halogenated phenolic alcohol, strong sulfonic acid, sulfonic acid ester and isoprene (Sumitomo Chemical, 1998, I, 99; JP 01048812)
Method used
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Embodiment 1
[0030] In a 250mL autoclave, under propylene atmosphere, add 8μmol catalyst A, 20mL chlorobenzene, 10% Et 3 Al 2 Cl 3 Toluene solution (Al / Ni molar ratio is 300), stirred at 20°C for 10min, then adjusted the gauge pressure of propylene to 0.4MPa, and kept the pressure steady for 60min; the material was extruded, hydrolyzed, and the composition and content of the product were analyzed by GC. The results are shown in Table 1.
Embodiment 2
[0031] Example 2: 8 μmol of catalyst B, other experimental methods and conditions are the same as in Example 1. The results are shown in Table 1.
Embodiment 3
[0032] Example 3: 8 μmol of catalyst C, other experimental methods and conditions are the same as in Example 1. The results are shown in Table 1.
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The catalyst system for dimerizing propylene to prepare C6 olefin consists of di-salicylal nickel(II) compound and organoaluminium compound; or consists of di-salicylal nickel(II) compound, organoaluminium compound and organic phosphine. The catalyst catalyzes the propylene dimerizing reaction in the presence of organic solvent. The catalyst system of di-salicylal nickel(II) compound and organoaluminium compound may reach catalytic activity of 90000-110000 mol C3 / mol Ni. hr, dimerizing selectivity of 70-90 % and methyl amylene content in the dimerizer product of 80 %. The catalyst system of di-salicylal nickel(II) compound, organoaluminium compound and organic phosphine may reach catalytic activity of 300000 mol C3 / mol Ni. hr, C6 olefin selectivity of 90 % and 2, 3-dimethyl butene selectivity of 65 %.
Description
technical field [0001] The invention relates to a catalytic system for preparing hexaolefin by dimerization of propylene. [0002] The invention also relates to the use of the above system in the dimerization of propylene. Background technique [0003] Propylene dimerization is one of the important methods to prepare hexaolefins, and various hexaolefins are important chemical raw materials and intermediates. For example, methylpentene can be used to synthesize flotation ore bubbler, 2,3-dimethylbutene is an important intermediate for the production of pesticide fenpropathrin and some spices, and 2,3-dimethylbutene is also used as Additives for gasoline to increase its octane number, α-hexene is used as an important comonomer for modifying polyolefin resins. [0004] In 1966, G. Wilke et al. used the cationic allyl nickel system to catalyze the dimerization of propylene (Wilke G, Bogdanovic B et al Angew Chem Int Ed, 1966, 5(2): 151), which promoted the transition metal cat...
Claims
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IPC IPC(8): B01J31/22C07C2/32
CPCY02P20/52
Inventor 吴思忠陆世维
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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