Recovery of Spent Methyldiethanolamines and Reduced Environmental Impact T.B. Turayev, N.A. Igamkulova, Sh.Sh. Mengliyev and H.N. Rakhimov E3S Web Conf., 491 (2024) 04010 Published online: 21 February 2024 DOI: 10.1051/e3sconf/202449104010