COMPONENTS OF CATALYST FOR POLYMERISATION OF OLEFINS AND CATALYSTS MADE FROM SAID COMPONENTS Russian patent published in 2012 - IPC C08F110/02 C08F4/654 C08F4/655 B01J37/00 B01J37/08 

FIELD: chemistry.

SUBSTANCE: invention describes catalyst components containing Ti, Mg, Cl and an optional OR¹ group, in which R¹ denotes a C1-C20 hydrocarbon group in such an amount that molar ratio OR¹/Ti is less than 0.5, characterised by the following properties: BET specific surface area less than 80 m²/g; total porosity (P_t) measured using a mercury method in the range of 0.70-1.50 cm³/g; the difference (P_t-P_f) is greater than 0.1, where P_T denotes total porosity and P_F denotes porosity due to pores with radius less than or equal to 1 mcm; the amount of Ti in the catalyst component is less than 10 wt %, based on total weight of the catalyst component. Described is a method of producing said components, involving a first step (a) where a compound MgCl₂.m(R^IIIOH)_tH₂O, in which 0.3≤m≤1.7, t ranges from 0.01 to 0.6 and R^III denotes an alkyl, cycloalkyl or aryl radical, having 1-12 carbon atoms, reacts with a titanium compound of formula Ti(OR^II)_nX_y-n, in which n lies between 0 and 0.5, y is titanium valence, X denotes a halogen and R^IV denotes an alkyl radical having 1-8 carbon atoms; and a second step (b) in which a solid product obtained from step (a) undergoes thermal treatment at temperature higher than 100°C. Described also is a method for (co)polymerisation of ethylene in the presence of a catalyst system containing a product of reaction of solid catalyst components described above and an aluminium alkyl compound.

EFFECT: catalyst components exhibit high morphological stability under conditions for low-molecular polymerisation of ethylene, while maintaining high activity.

10 cl, 4 tbl, 16 ex