- METHOD FOR THE PRODUCTION OF LINEAR ALPHA-OLEFINS
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The invention relates to a method for the production of C4-C30-α-olefins from C4-C30-olefins which have internal double bonds, comprising the following steps: a) reacting an internal C4-C30-olefin with a trialkylaluminium compound in the presence of a nickel-free isomerisation/transalkylation catalyst containing at least one isomerisation active metal component and at least one displacement active metal component, by releasing an olefin which is derived from the initially bound alkyl radical, and forming a trialkylaluminium compound wherein at least one alkyl radical is derived from a C4-C30-?-olefin, b) reacting the trialkylaluminium compound formed in step a), which releases the desired C4-C30-?-olefin.
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- One-step synthesis of trialkylaluminum derivatives and dialkylaluminum hydrides by the reaction of alkaline metal aluminum hydrides with α-olefins and alkylaluminum chlorides
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A simple method for one-step preparation of the organoaluminum compounds R3Al, R2AlH, R2R′Al, and RR′AlH by the reaction of MAlH4 (M = Li, Na) with R2AlHal (Hal = Cl, Br) and α-olefins (3-methylbut-1-ene, hex-1-ene, oct-1-ene, dec-1-ene) was proposed.
- Gavrilenko
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p. 168 - 169
(2007/10/03)
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- Synthesis of trialkylaluminum derivatives by the reaction of non-solvated aluminum hydride with α-olefins
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Hydroalumination of α-olefins by non-solvated polymeric aluminum hydride (AlH3)n occurs at 120-140°C. Mechanochemical activation accelerates this reaction. The addition of catalytic amounts of the prepared R3Al forms to the reaction system decreases the temperature of the process to 90-100°C. The greatest initiation effect is observed when ate-complexes of the MAlR4 type (M = Li, Na) are used: the reaction occurs with a higher rate already at 60-90°C affording R3Al free of admixtures of carbalumination products and dimers of α-olefins.
- Gavrilenko
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p. 1161 - 1163
(2007/10/03)
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- Continuous process for preparing aluminum alkyls and linear 1-olefins from internal olefins
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Linear 1-olefins are continuously prepared from internal olevins by (i) continuously feeding internal olefin, isomerization catalyst and tri-lower alkyl aluminum to a reaction zone so as to cause the internal olefin to isomerize to 1-olefins which displace the lower alkyl groups to form a trialkyl aluminum compound in which at least one of the alkyl groups is a linear alkyl derived from the 1-olefin, (ii) continuously removing trialkylaluminum compound from the reaction zone and, thereafter, (iii) reacting the trialkyl aluminum compound with a 1-olefin so as to displace the linear alkyl from the trialkyl aluminum compound, thereby forming a linear 1-olefin product which is substantially free of internal olefins.
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- Continuous process for preparing aluminum alkyls and linear 1-olefins from internal olefins
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Linear 1-olefins are continuously prepared from internal olefins by (i) continuously feeding internal olefin, isomerization catalyst and tri-lower alkyl aluminum to a reaction zone so as to cause the internal olefin to isomerize to 1-olefins which displace the lower alkyl groups to form a trialkyl aluminum compound in which at least one of the alkyl groups is a linear alkyl derived from the 1-olefin, (ii) continuously removing trialkylaluminum compound from the reaction zone and, thereafter (iii) reacting the trialkyl aluminum compound with a 1-olefin so as to displace the linear alkyl from the trialkyl aluminum compound, thereby forming a linear 1-olefin product which is substantially free of internal olefins.
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- Aluminum alkyls and linear 1-olefins from internal olefins
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Linear 1-olefins are prepared from internal olefins by (i) reacting them in the presence of an isomerization catalyst and a tri-lower alkyl aluminum so as to cause the internal olefin to isomerize to 1-olefins which displace the lower alkyl groups to form a trialkyl aluminum compound in which at least one of the alkyl groups is a linear alkyl derived from the 1-olefin, and, thereafter, (ii) reacting the trialkyl aluminum compound with a 1-olefin so as to displace the linear alkyl from the trialkyl aluminum compound, thereby forming a linear 1-olefin product which is substantially free of internal olefins.
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