US 12,479,875 B2
Preparation of catalyst system
Luigi Maria Cristoforo Resconi, Linz (AT); Alexander Reznichenko, Porvoo (FI); and Ville Virkkunen, Porvoo (FI)
Assigned to BOREALIS AG, Vienna (AT)
Appl. No. 17/614,742
Filed by BOREALIS AG, Vienna (AT)
PCT Filed May 20, 2020, PCT No. PCT/EP2020/064183
§ 371(c)(1), (2) Date Nov. 29, 2021,
PCT Pub. No. WO2020/239598, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 19177307 (EP), filed on May 29, 2019; and application No. 19177308 (EP), filed on May 29, 2019.
Prior Publication US 2022/0220143 A1, Jul. 14, 2022
Int. Cl. C08F 4/659 (2006.01); C07F 17/00 (2006.01); C08F 4/649 (2006.01); C08F 4/6592 (2006.01); C08F 10/06 (2006.01); C08F 110/06 (2006.01); C08F 210/16 (2006.01)
CPC C07F 17/00 (2013.01) [C08F 4/6492 (2013.01); C08F 4/65908 (2013.01); C08F 4/65912 (2013.01); C08F 4/65916 (2013.01); C08F 4/65927 (2013.01); C08F 10/06 (2013.01); C08F 110/06 (2013.01); C08F 2420/00 (2013.01); C08F 2420/08 (2021.01); C08F 2500/12 (2013.01); C08F 2500/17 (2013.01); C08F 2500/34 (2021.01); C08F 2500/35 (2021.01); C08F 2800/10 (2013.01)] 15 Claims
 
1. A process for the preparation of a supported catalyst system, wherein the catalyst system comprises:
(i) a metallocene complex;
(ii) a cocatalyst system comprising a boron containing cocatalyst and an aluminoxane cocatalyst; and
(iii) a porous inorganic silica support;
whereby the process comprises the steps of:
a) treating the porous inorganic support with the aluminoxane cocatalyst in a hydrocarbon solvent, optionally followed by thermal treatment of the aluminoxane treated support;
b) combining the metallocene complex with the boron containing cocatalyst and optionally with the aluminoxane cocatalyst in the hydrocarbon solvent;
c) loading the solution of step b) onto the treated support of step a);
wherein the amount of aluminoxane cocatalyst added in step a) is 75.0 to 100.0 wt % of the total amount of aluminoxane cocatalyst and the amount of aluminoxane cocatalyst added in step b) is 0.0 to 25.0 wt % of the total amount of aluminoxane cocatalyst; and
wherein the metallocene complex is of formula (VI):

OG Complex Work Unit Chemistry
wherein
each X independently is a sigma-donor ligand,
M is a group 4 metal;
L is a carbon, silicon, or germanium based bridge in which one to four backbone atoms link the ligands; and
each Ind is a substituted or unsubstituted indenyl, or a substituted or unsubstituted fused indenyl; and
wherein the boron containing cocatalyst is either of formula (B) or a borate containing an anion of formula (C):
BY3  (B)
(Z)4B—  (C)
wherein
each Y independently is a hydrogen atom, an alkyl group of from 1 to about 20 carbon atoms, an aryl group of from 6 to about 15 carbon atoms, alkylaryl, arylalkyl, haloalkyl or haloaryl each having from 1 to 10 carbon atoms in the alkyl radical and from 6-20 carbon atoms in the aryl radical or fluorine, chlorine, bromine or iodine; or
Z is an optionally substituted phenyl derivative, said substituent being a halo-C1-6-alkyl or halo group, and as counterions protonated amine or aniline derivatives.