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[References: р. 136-137 (17 tit.)]

Optimization and forecasting of light gasoline fractions isomerization is a complex technological issue, as it includes a variety of factors and independent parameters. The most effective solution is to use the mathematical modeling method of physical and chemical laws of the process. In this paper, we propose a method of intensification of the combined fractionation and isomerization processes of pentane-hexane fraction with the aim to improve the service durability of the catalyst SI-2 on the L-35-11 / 300 production unit. The developed complex mathematical model takes into account the influence of the feedstock composition, allows for assessment of the catalyst current activity and it is also a powerful optimization tool. According to the survey results the optimizing the feedstock composition will increase the octane number of the isomerate at 1.6-2.2 points.