α-METHYLSTYRENE OLIGOMERISATION CATALYST AND PREPARATION METHOD THEREOF Russian patent published in 2010 - IPC B01J37/02 B01J27/14 

FIELD: chemistry.

SUBSTANCE: present invention relates to catalysis. The invention describes an α-methylstyrene oligomerisation catalyst which contains phosphoric acid on a carbon support, characterised by that the support used is carbon material with total pore volume of 0.2-0.6 cm³/g with average mesopore size between 4 and 40 nm, specific surface area of 100-450 m²/g and strength of not less than 100 kg/cm². Content of phosphates in the catalyst is between 10 and 15 wt % in terms of P₂O₅. Described also is a method of preparing an α-methylstyrene oligomerisation catalyst, involving impregnation of the support with phosphoric acid followed by thermal treatment, characterised by that impregnation is carried out in a vacuum, thermal treatment is carried out in three steps at temperature 20-250°C with time intervals between the steps and the support used is carbon material with specific surface area of 100-450 m²/g, average mesopore size of 4-40 nm, total pore volume of 0.2-0.6 cm³/g and strength of not less than 100-120 kg/cm², to obtain a catalyst with P₂O₅ content between 10 and 15 wt %.

EFFECT: higher mechanical strength and higher activity of α-methylstyrene oligomerisation catalyst.

2 cl, 2 tbl, 4 ex