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SYNTHESIS OF MANNITOL FROM INULIN USING A MAGNETIC CATALYST
Abstract
Mannitol is an important raw material in the production of resins, lubricants, coatings, surfactants, explosives, cosmetics and drugs. One of the promising ways to obtain it is the catalytic conversion of inulin, a natural polyfructosan found in large quantities in some agricultural crops. In this study a Ru-containing magnetic catalyst was proposed for the process of hydrolytic hydrogenation of inulin to mannitol. Under optimal reaction conditions a high mannitol selectivity of 44.3 % was obtained 100 % conversion of the original polysaccharide. In the course of the work, kinetic experiments were carried out, the regularities of the reaction of hydrolytic hydrogenation of inulin with the formation of mannitol and a number of minor products were revealed. Based on the experimental data obtained, a reaction scheme was proposed, a mathematical model of the process that most adequately describes the experimentally obtained data, and its parameters were calculated. The magnetic catalyst turned out to be stable under hydrothermal reaction conditions, easily separated from the liquid phase of the catalyzate by an external magnetic field, which makes it promising, in particular, for use in the processes of conversion of plant biomass into raw materials for chemical synthesis and fuel production.
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