SPRAY DRIED (PRO)CATALYTIC ZIEGLER-NATTA SYSTEMS Russian patent published in 2023 - IPC C08F4/655 C08F210/16 C08F2/34 

FIELD: pharmaceuticals.

SUBSTANCE: invention relates to a process for producing a spray-dried Ziegler-Natta procatalytic system comprising: mixing spray-dried pulverized solid particles consisting essentially of hydrophobic highly dispersed silicon dioxide, MgCl₂ and tetrahydrofuran (THF) with a hydrocarbon liquid and one of titanium tetraisopropoxide (Ti(OiPr)₄) and ethylaluminum dichloride (ECEA), but not simultaneously with Ti(OiPr)₄ and ECEA, to form an intermediate mixture consisting essentially of or being a reaction product derived from spray-dried pulverized solids, hydrocarbon liquid and either Ti(OiPr)₄ or DHEA, but not both Ti(OiPr)₄ and DHEA; and combining the intermediate mixture with another mixture of Ti(OiPr)₄ or DHEA, which was not used in the mixing step, to obtain a spray-dried precatalytic Ziegler-Natta system. The invention also relates to a process variant for the production of a spray-dried procatalytic Ziegler-Natta system and a process for the production of a polyolefin polymer.

EFFECT: spray-dried Ziegler-Natta catalytic system can increase the reaction rate of the olefin polymerization process, polyolefin polymers obtained using this method can have one or more improved properties.

9 cl, 14 ex, 3 tbl, 1 dwg