N.S. Trutnev - Ph. D. (Eng.), Associate Professor, Chemical Engineering Institute of University of Mechanical Engineering. E-mail: trutnev7@yandex.ru A.A. Shishkin - Ph. D. (Eng.), JSC «R&D PE «ZVEZDA». E-mail: hewa@inbox.ru T.V. Filimonova - Master, JSC «R&D PE «ZVEZDA». E-mail: filimon2510@mail.ru