In 1997 - 1979, Ryazan' Oil Refinery was the first in the industry to convert all reforming units to KR-102, KR-104, and KR-106 polymetallic catalysts. The individual stages of the process were perfected, which allowed improving the technical and economic indexes of operation of the units in comparison to the indexes for the monometallic AP-64 catalyst [1 - 3]. KR-108 and KR-110 catalysts, primarily distinguished by high selectivity, were used in three reforming units in 1982 - 1983 [4]. These catalysts were the most widely used in the industry and were successfully used to the beginning of the 1990s [5].