The effect of BaCl2 promotor on the catalytic properties of Fe-Te-Mo-Ox catalyst of joint oxidative dehydration and oxidative amonolysis of C4 olefins has been examined. The optimal composition of promoted catalyst has been established taking into consideration methacrylonitrile and butadiene yields. The process kinetics has been investigated
 Zhyznevskiy V., Roksana M., Kozharskiy V. and Kucher R.: Dopovidi Akademii Nauk USSR, 1991, 3, 118.
 Ghenassia E. and Germain J.: Bull.Soc.Chem.France, 1975, 3, 731.
 Stergiov L., Gilot B. and Lagueric C.: Chem.Eng.J., 1983, 26, 201.
 Margolis L.: Geterogennoe cataliticheskoe okiskenie uglevodorodov. Leningrad, 1967.