SYNTHESIS AND RESEARCH OF THE CATALYTIC SYSTEM xAlPO4 . yCu3(PO4)2

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Individual orthophosphate catalysts AlPO4 and Cu3(PO4)2 were synthesized. A new synthesis technique was developed and a new complex aluminum-copper (II) orthophosphate catalytic system of the type xAlPO4·yCu3(PO4)2 was obtained based on them (К-1–К-7), which has the predicted physical and chemical properties. The content of both orthophosphates in the catalyst structure varies in the range of 0.5 - 99.5 wt. %. At the final heat treatment temperature (700oC), all synthesized complex catalysts K-1–K-7 are X-ray crystalline. The process of thermal treatment of catalysts contributes to their gradual dehydration and release of water from the structure of the samples, as well as the occurrence of characteristic endothermic effects at the appropriate temperatures. At high temperatures of heat treatment (about 500 oC), the processes of crystallization of the structures are observed on the synthesized samples K-1–K-7. Heating of all samples of a complex catalytic orthophosphate system of the type xAlPO4.yCu3(PO4)2 at temperatures above 700 oC leads to their complete dehydration and the formation of anhydrous salts. It can be predicted that the synthesized new complex oxide catalytic heterogeneous systems of the type xAlPO4.yCu3(PO4)2 have been will show improved both acidic surface properties and catalytic parameters: activity and selectivity in reactions of partial oxidation of n-alkanes to valuable products.