Reserves for improving the efficiency of petrochemical production on the basis of “Industry 4.0”A. I. Shinkevich, N. V. Barsegyan, M. V. Shinkevich, S. S. Ostanina, F. F. Galimulina and M. E. NadezhdinaE3S Web Conf., 124 (2019) 04006DOI: https://doi.org/10.1051/e3sconf/201912404006