CATALYST FOR DEHYDROGENATION OF ISOPENTANE AND ISOPENTANE-ISOAMYLENE FRACTIONS AND METHOD OF PREPARING SAID CATALYST Russian patent published in 2009 - IPC B01J21/04 B01J23/42 B01J23/60 C07C5/333 C07C5/32 B01J37/00 B01J35/00 B82B1/00 B01J23/62 

FIELD: chemistry.

SUBSTANCE: invention relates to organic chemistry and petrochemistry, particularly to designing and using catalysts. Described is a catalyst for dehydrogenation of isopentane and isopentane-isoamylene fractions based on platinum and tin, deposited on a carrier - zincalume spinel. The catalyst is distinguished by that, the carrier is in form of nanocrystalline particles with average crystal size of 22-35 nm with components in the following ratio, wt %: platinum - 0.05-2.0, tin - 0.1-6.0, zincalume spinel - the rest. Also described is a method of preparing said catalyst, involving grinding and mixing oxygen-containing zinc and aluminium compounds, gradual addition of water until obtaining a homogeneous pasty mass, stirring and moulding, drying the granules at room temperature and calcination, subsequent saturation of the formed carrier with an aqueous solution of platinum and tin compounds, final drying of the catalyst mass in air; the method is distinguished by that, the carrier is calcined while gradually raising temperature to 800-900°C at a rate of 10-200°C/hour, and then for 5-40 hours at 850-1000°C, while constantly controlling size of the formed crystals until formation of nanocrystalline particles with average crystal size of 22-35 nm.

EFFECT: increased efficiency of dehydrogenation process due to increased output of isoprene, with high selectivity on dehydrogenation products, as well as due to longer inter-regeneration period of the catalyst.

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