FIELD: petroleum processing and petrochemistry.
SUBSTANCE: invention relates to combination of compounds and to a method for using such combination suitable to suppress or to prevent formation of coke in thermal cracking furnaces using water steam to produce ethylene. Combination consists of one or several compounds covered by formula R-Sx-R', where R and R' represent independently H, straight-chain of branched C1-C24-alkyl, or aryl and x=1-5, and one or several compounds selected from RR'N(OH) and RHN-NHR', where R and R' represent independently H, straight-chain of branched C1-C24-alkyl, or aryl, and RR'R"NO, where R represents H or alkyl and R' and R" represent C1-C24-alkyl.
EFFECT: reduced or prevented coke formation.
2 cl, 2 tbl
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