Studying the process of freons mixture separation on a structured packing Sultzer 500X Aleksandr Pavlenko, Vladimir Zhukov, Nikolay Pecherkin, Ekaterina Slesareva, Christo Boyadjiev and Daniela Dzhonova-Atanasova E3S Web Conf., 258 (2021) 11008 Published online: 20 May 2021 DOI: 10.1051/e3sconf/202125811008