Investigation of the drying process of ehfef in the technology of obtaining a nanocatalyst from the retention substance bentoniteN. I. Fayzullayev, J. M. Kurbonov, G. B. Daminova, R. J. Kurbonova and J. J. KurbonovE3S Web of Conf., 402 (2023) 14026DOI: https://doi.org/10.1051/e3sconf/202340214026