PETROLEUM FRACTION ISODEWAXING CATALYST AND A METHOD FOR PREPARATION THEREOF Russian patent published in 2008 - IPC B01J23/652 B01J29/44 B01J23/62 B01J21/04 B01J37/02 C07C5/27 C10G35/95 

FIELD: petrochemical processes and catalysts.

SUBSTANCE: invention provides isodewaxing catalyst for petroleum fractions containing supported platinum and modifiers wherein supporting carrier is fine powdered high-purity alumina mixed with zeolite ZSM 5 in H form having SiO₂/Al₂O₃ molar ratio 25-80 or with zeolite BETA in H form having SiO₂/Al₂O₃ molar ratio 25-40 at following proportions of components, wt %: platinum 0.15-0.60, alumina 58.61-89.43, zeolite 5-40, tungsten oxide (modifier) 1-4, and indium oxide (modifier) 0.24-0.97. Preparation of catalyst comprises preparing carrier using method of competitive impregnation from common solution of platinum-hydrochloric, acetic, and hydrochloric acids followed by drying and calcinations, wherein carrier is prepared by gelation of fine powdered high-purity alumina with the aid of 3-15% nitric acid solution followed by consecutive addition of silicotungstenic acid solution and indium chloride solution, and then zeolite ZSM 5 in H form having SiO₂/Al₂O₃ molar ratio 25-80 or with zeolite BETA in H form having SiO₂/Al₂O₃ molar ratio 25-40.

EFFECT: increased yield of isoparaffin hydrocarbons.

7 cl, 2 tbl, 7 ex