Alpha-olefin

Abstract: A process for oligomerizing alpha olefin to produce lubricant range hydrocarbon stock including the step of contacting said alpha olefin with a supported solid reduced Group VIB (e.g., chromium) catalyst under oligomerization conditions at a temperature of about 90° to 250° C. to produce liquid lubricant hydrocarbon. The product comprises the polymeric residue of linear C 6 -C 20 1-alkenes, said composition having a branch ratio of less than 0.19. The weight average molecular weight is between 420 and 45,000, number average molecular weight between 420 and 18,000, molecular weight distribution between 1 and 5 and pour point below -15° C. The hydrogenated lubricant range hydrocarbon product has viscosity index of about 130 to 280 and viscosity up to about 750 cS. The process is particularly useful where the starting alpha olefin consists essentially of olefinic hydrocarbon having 8 to 14 carbon atoms or mixtures thereof; wherein the process conditions include reaction temperature of about 100° to 180°; and wherein the support catalyst includes porous inert silica.

Abstract: The invention provides a process using olefin polymerization catalysts exhibiting excellent polymerization activities. The olefin polymerization catalysts of the invention contain a transition metal compound of and at least one of an organometallic compound, an organoaluminum oxy-compound or a compound which reacts with said transition metal compound to form an ion pair. The process using the inventive catalysts is useful in producing α-olefin/conjugated diene copolymers having specific properties.

Abstract: A process for polymerizing α-olefin by using a catalytic system prepared by bringing a reaction product of a halogenated metallocene compound with an organometallic compound into contact with a compound which forms a stable anion when reacted with the reaction product. A polyolefin can be obtained at a high catalytic activity by using an inexpensive catalyst by this process.

Abstract: A catalyst for olefin polymerization is provided which comprises, as the components, a) a metallocene compound, b) an ionizing ionic compound, c) an organoaluminum compound, and d) a Lewis base compound. This catalyst has a stable active species and improves productivity of an olefin polymer without deterioration of the catalytic activity.