Oligomerization of olefins to highly linear oligomers, and catalysts for this purpose
AssigneeBASF SE
InventorsMaximilian Vicari, Peter Polanek
Life of this patent
Estimating the term…
Abstract
Straight-chain C.sub.2 -C.sub.6 -olefins are oligomerized to their dimers, trimers and tetramers by means of a fixed-bed catalyst, at superatmospheric pressure and at room temperature or elevated temperatures, by a process in which the catalyst used is one which contains, as active components, after deduction of the loss on ignition following heating at 900.degree. C., from 10 to 70% by weight of nickel oxide, calculated as NiO, from 5 to 30% by weight of titanium dioxide or zirconium dioxide, from 0 to 20% by weight of alumina, from 20 to 40% by weight of silica and from 0.01 to 1% by weight of an alkali metal oxide, with the proviso that the contents of the individual components in the catalyst sum to 100% by weight.
Claims10
A process for the oligomerization of straight-chain C.sub.2 -C.sub.6 -olefins to their dimers, trimers and tetramers by means of a fixed-bed catalyst, at superatmospheric pressure and at room temperature or elevated temperatures, wherein the catalyst used is one which contains, as active components, after deduction of the loss on ignition following heating at 900.degree. C., from 10 to 70% by weight of nickel oxide, calculated as NiO, from 5 to 30% by weight of titanium dioxide or zirconium dioxide, from 0 to 20% by weight of alumina, from 20 to 40% by weight of silica and from 0.01 to 1% by weight of an alkali metal oxide, with the proviso that the contents of the individual components in the catalyst sum to 100% by weight.
A process for the oligomerization of straight-chain C.sub.2 -C.sub.6 -olefins to their dimers, trimers and tetramers by means of a fixed-bed catalyst, at superatmospheric pressure and at room temperature or elevated temperatures, wherein the catalyst comprises:
- nickel oxide, silica, titanium dioxide or zirconium dioxide and, optionally, alumina and containing, after deduction of the loss on ignition following heating at 900.degree. C., from 10 to 70% by weight of nickel oxide, calculated as NiO, from 5 to 30% by weight of titanium dioxide or zirconium dioxide, from 0 to 20% by weight of alumina, from 20 to 40% by weight of silica and from 0.01 to 1% by weight of an alkali metal oxide, with the proviso that the proportions of the individual components sum to 100% by weight, obtained by precipitating a nickel salt solution which is free of aluminum or contains a dissolved aluminum salt at a pH of from 5 to 9 by the addition of this nickel salt solution to an alkali metal waterglass solution which contains solid titanium dioxide or zirconium dioxide, drying and heating the resulting precipitate at from 350.degree. to 650.degree. C.
Dependencies are inferred from the claim text.