ZEOLITE-BEARING CATALYST, METHOD OF ITS PRODUCTION AND METHOD OF CONVERTING LOW-OCTANE GASOLINE IN HIGH-OCTANE GASOLINE WITH AND WITHOUT HYDROGEN Russian patent published in 2013 - IPC B01J29/46 B01J29/48 B01J21/04 B01J21/06 B01J37/00 C10G35/95 

FIELD: process engineering.

SUBSTANCE: invention relates to petrochemical and oil processing industries. Zeolite-bearing catalyst comprises zeolite ZSM-5 with silicate module SiO₂/Al₂O₃=30-80 mol/mol, and zeolite structure elements, e.g. niobium oxide and/or molybdenum oxide and/or cobalt oxide, or mixes thereof, and zirconium oxide, at the following ratio of components, wt %: zeolite - 70.00-90.0; ZrO₂ - 0-3.00; Nb₂O₃ - 0-3.00; MoO₃ - 0-3.00; CoO - 0-2.00; Na₂O - 0.03-0.10, and binder making the rest. Proposed method of producing said catalyst comprises mixing reagents, hydrothermal synthesis, washing, drying and calcination of precipitate. Note here that reaction mix produced by mixing water solutions of aluminium nitrate, sodium hydroxide, silicic acid or KCKG silica gel, niobium pentachloride, zirconium sulphate, molybdenum trioxide, zeolite seed crystals with ZSM-5/MF1 structure in amendment Na- or H-form, for example, butanol-1, monoethanolamine, dibutylamine, diethylentriamine, is loaded into reactor for hydrothermal synthesis at 175-185°C for 8-24 h. Thereafter, pulp of Na-form zeolite is filtered. Obtained precipitate is repulped in water solution of sodium oxide hydrate. Zeolite precipitate is filtered and repulped in water solution of ammonia bicarbonate. Zeolite precipitate is filtered and directed for acid or salt ion exchange by treatment with nitric acid water solution or water solutions of ammonia salts at pulp heating and mixing. Ammonia bicarbonate is added to pulp obtained after said acid or salt ion exchange and filtered out. Washed H- or NH₄-zeolite is dried and subjected to preparation of catalyst mass by mixing zeolite powder with active aluminium hydroxide and concentrated nitric acid. Produced catalyst mass is extruded and pelletised. Produced pellets are dried at 150°C and calcined at 550-600°C. Proposed method of converting virgin gasoline fractions into high-octane gasoline with the help of zeolite-bearing catalyst comprises forcing vapors of virgin gasoline fractions through stationary bed of above described catalyst with additional feed of hydrogen into reaction zone.

EFFECT: higher quality and increased yield.

4 cl, 9 tbl, 21 ex