Patent ID: 7268268

Claim:
A process for dimerizing a feed consisting essentially of isobutene, comprising contacting the feed under dimerization conditions at temperatures from 10° C. to 150° C. and with a catalyst system which comprises at lease one of a: (a) tectometallosilicate zeolite having TON-type structure, (b) tectometallosilicate zeolite having MTT-type structure, (c) tectometallosilicate zeolite having ZSM-48 type structure, or (d) silicoaluminophosphate zeo-type material with AEL-type structure; wherein the zeolite and the zeo-type material are wholly in the H-form, and the zeolite has the following composition and mole ratios: (0.9±0.1)H (4−m) XO 2 :xSIO 2 :yH 2 O wherein H is a proton, X is one or more of Al, Ga, Zn, Fe, Cr, and B, m is the valency of X in XO 2 , x is at least 10, y/x is from 0 to 5; and the zeo-type material has the following composition and mole ratios: (O-a)H:(Si a Al b P c )O 2 :yH 2 O wherein H is a proton, a, b, and c represent the number of atoms of silicon, aluminum and phosphorus respectively present in the zeo-type material and y is moles of hydration water in the zeo-type material.