CATALYST, PREPARATION METHOD THEREOF AND METHOD FOR SINGLE-STEP SYNTHESIS OF PROPYLENE FROM ETHYLENE Russian patent published in 2011 - IPC B01J23/36 B01J23/755 B01J21/02 B01J21/04 B01J37/02 C07C6/04 

FIELD: chemistry.

SUBSTANCE: invention relates to oil and gas chemistry and specifically to catalysts and processes for synthesis of light alkenes, particularly propylene. Described is a catalyst for single-step synthesis of propylene from ethylene, containing rhenium oxide Re₂O₇ and nickel oxide NiO, attached to the surface of a carrier in form of borate-containing aluminium oxide with the following ratio of components in wt %: Re₂O₇ - 5-13; NiO - 4-8; B₂O₃ - 15-18; Al₂O₃ - the rest. Described is a method of preparing said catalyst, which involves preliminary production of borate-containing aluminium oxide by mixing a hydrate of aluminium oxide having a pseudo-boehmite structure with ortho-boric acid, drying at 120°C and calcination at 550°C in an air current for 16 hours, followed by saturation of the borate-containing aluminium oxide with an aqueous solution containing perrhenic acid and nickel nitrate, drying at 120°C and calcination at 550°C for 16 hours. Described also is a method for single-step synthesis of propylene from ethylene which involves passing a stream of pure (100%) ethylene through a fixed layer of the disclosed catalyst at temperature 40-150°C, pressure close to atmospheric pressure and mass flow rate of feeding ethylene equal to 1 h^-1.

EFFECT: high efficiency of single-step synthesis of propylene from ethylene owing to high selectivity of formation and output of propylene.

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