公开(公告)号：EP1421045A1

公开(公告)日：2004-05-26

申请号：EP02755041.7

申请日：2002-07-26

申请人： Fortum OYJ

发明人： PUROLA, Veli-Matti ,  TOPPINEN, Sami ,  PYHÄLAHTI, Antti ,  LINDBLAD, Marina ,  GRÖNQVIST, Johan ,  SIIRA, Pirjo

IPC分类号： C07C2/28

CPC分类号： C07C2/28 ,  C07C2531/10 ,  Y02P20/127

摘要： The invention relates to a method 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.