Process for catalytic dimerization of isobutene

Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By addition of entire unsaturated molecules – e.g.,...

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585510, 585520, 585533, 585666, C07C 202

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053248783

ABSTRACT:
Disclosed is a process for carrying out the selective dimerization of isobutene in order to produce alpha- and beta-di-isobutene dimer.sub.3, according to which process an isobutene stream is brought into contact, under dimerization conditions, with a solid silica gel/alumina catalyst which is amorphous when analyzed by X-ray diffraction, displays a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 comprised within the range of from 30:1 to 500:1, has a surface-area comprised within the range of from 500 to 1000 m.sup.2 /g, a porosity of from 0.3 to 0.6 ml/g and an average pore diameter of approximately 10 .ANG. (.ANG.ngstrom), and is free from pores with a larger diameter than 30 .ANG..

REFERENCES:
patent: 3325472 (1967-06-01), Jones et al.
patent: 3518323 (1970-06-01), Pine et al.
patent: 3760026 (1973-09-01), Reusser et al.
patent: 5049536 (1991-09-01), Bellussi et al.

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