Patent ID: 8394737
Filing Date: 2013-03-12
Classification: B01J,C08F

Abstract:
1. A method for preparing an activating support that comprises the steps of: a) providing a support prepared from silica or from mixed mineral oxides based on silica; b) grafting on the surface of the support of step a) a mixture of silylating agents comprising a functionalised silylating agent of formula Y c) adding to the intermediate support of step b) a non-nucleophile trimethylsilylating agent selected from the group consisting of trimethylphenoxysilane, hexamethyldisiloxane, trimethylsilyl methanesulfonate, trimethylsilyl trifluoromethanesulfonate, trimethylsilyl-p-toluenesulfonate, hexamethyldisilazane, N,N-bis(trimethylsilyl)urea, N,O-bis(trimethylsilyl)acetamide, N-trimethylsilyl acetamide, N-methyl-N-trimethylsilyltrifluoroacetamide, N-trimethylsilylimidazole, N-trimethylsilylthiazole, N-trimethylsilyloxazole and a trialkylhalogensilane to form an intermediate support: d) protonating the intermediate support of step c) with an acid AH in order to form a protonated intermediate support: e) adding a borate or aluminate XM to the protonated intermediate support of step d) wherein X is Al- or B-containing activating group and M is a metal Group 1 of the Periodic Table, to form an activating support: and f) retrieving the activating support.