CONVERSION OF PROPANE TO FORMALDEHYDE ON IRON PHOSPHATE

Abstract

Phosphates represent diverse complex systems, whose basic structural unit is tetrahedron. They are widely applied as catalysts, carriers of catalytic active substances, adsorbents and ion exchangers. Phosphoric acid and phosphates act as catalyst for reactions of alkylation, cracking, izomerization, polymerization, hydrogenation and dehydrogenation. Phosphates of some metals promote oxidation of normal alkanes with derivation of aldehydes, acids, spirits and maleic anhydride.
 The process of propane and propylene oxidation on iron phosphate is investigated, as well as the influence of such factors as temperature, contact time of the reacting mixture with the catalyst t, the ratio of oxygen and hydrocarbon concentration in a mixture, and the influence of hydrogen concentration on the given process is shown.
 It is demonstrated that the optimum conditions for the realization of propane oxidation process is the temperature of 973 K and t = 0.17 s. It is established that with excess propane in the reaction mixture propylene is the predecessor of formaldehyde. On the contrary, at small concentration of propane in the mixture formaldehyde will be derived immediately from propane. The schemes of propane and propylene oxidation in formaldehyde are offered.
 Keywords: catalyst; oxidatio; рhosphates; propane; propylene; formaldehyde.