Polysar International, S.a.

John R Adams

Abraham P Gelbein

Martin B Sherwin

Robert Hansen

Jimmy Y Peress

A process is provided for the skeletal isomerization of straight chain olefins to branched chain olefins wherein the olefin is contacted with an activated alumina catalyst which has a particle size of from about 0.5.times.10.sup.-3 cm to about 160.times.10.sup.-3 cm and at least 10% of the pore volume is attributable to pores having radii between about 100 and 10,000 Angstroms.

Isomerization

A process is provided for the skeletal isomerization of straight chain olefins to branched chain olefins by contact at an elevated temperature with a chlorine- or fluorine-containing compound activated alumina catalyst, the alumina having an average particle size of from about 0.5.times.10.sup.-3 cm to about 160.times.10.sup.-3 cm and from 3 to 9% of the pore volume being attributable to pores having radii from about 100 to about 10,000 Angstroms.

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Sarnia, Canada

John R Adams