Fuel components and their selective manufacturing methods

Details Fuel components and their selective manufacturing methods Fuel components and their selective manufacturing methods

C - Chemistry, Metallurgy

07

C

C07C 2/06 (2006.01) C07C 2/28 (2006.01) C07C 11/09 (2006.01)

Patent

CA 2385785

The invention relates to a process for dimerizing isobutene, wherein, in dimerizing conditions, the isobutene is brought into contact with a porous cation exchange resin comprising a styrene polymer, which is cross-linked with divinyl benzene, and any sulphonic acid groups adhering to the polymer. The harmful deactivation of this catalyst, which is caused by the accumulation of the oligomers and polymers of isobutene and other C4-olefins in the cation exchange resin catalyst, is essentially decreased by selecting the cation exchange resin from a group including cation exchange resins, the acid capacity of which is 4.7 equivalents/kg at a minimum, and the portion of divinyl benzene units of which is 5% by weight at a minimum and smaller than 20% by weight.

La présente invention a pour objet un procédé de dimérisation de l'isobutène, pour lequel, dans des conditions de dimérisation, l'isobutène est mis en contact avec une résine poreuse échangeuse de cations contenant un polymère du styrène réticulé avec du divinylbenzène et n'importe quel groupe acide sulfonique adhèrant au polymère. La désactivation dommageable de ce catalyseur, causée par l'accumulation d'oligomères et de polymères d'isobutène et d'autres oléfines en C4 dans le catalyseur de la résine échangeuse de cations est essentiellement atténuée par le choix d'une résine échangeuse de cations provenant d'un groupe incluant des résines échangeuses de cations dont la capacité acide est de 4,7 équivalents/kg au minimum et la partie des unités de divinylbenzène représente au moins 5 % en poids et au plus 20 % en poids.

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