TY JOUR TI RESULTS OF STUDIES OF THE EFFECT OF A COAGULANT ON THE PURIFICATION OF USED MOTOR OILS KW oil KW cleaning KW coagulant KW temperature KW sediment JO Vestnik of Omsk SAU AU MALTSEVA, E.I. AU DEMCHUK, E.V. AU MYALO, O.V. AU PROKOPOV, S.P. PY 2023 IS 52 PB FSBEI HE Omsk SAU