SELECTION AND PILOT TESTS OF THE EFFECTIVE METHOD OF REGENERATION THE CATALYST OF THE OIL REFINING GASES OLIGOMERIZATION PROCESS

Despite the prevalence and effectiveness of the method of oxidative regeneration of catalysts, it is known that the application of this method leads to irreversible deactivation and sintering processes. The study of regeneration approaches and the search for alternative effective methods for restoring the activity of catalysts are an actual task. In the present work, the results of application of various approaches of regeneration of the oligomerization catalyst based on modified montmorillonite are presented. The efficiency of extractive regeneration by supercritical carbon dioxide and benzene-toluene-xylene (BTX) fraction has been established by the differential thermal analysis method, the latter approach allows restoring the catalyst activity practically to the level of a fresh sample. In order to determine the efficiency and stability of the catalyst during the oligomerization of the butane-butylene fraction, in complex with the regeneration of the BTX fraction, pilot tests were carried out for 4000 hours, and the high efficiency of the developed technical solution for the production of С6-С9 hydrocarbons was proved.