Patent ID: 8791314

Claim:
Process for reducing coking and/or carbon monoxide formation on metal walls of a reactor and/or heat exchanger used for cracking of hydrocarbons and/or other organic compounds to produce olefins, characterized in pretreating the metal walls with a stream comprising a carrier fluid and an additive selected from the group consisting of diethyl disulphide (DEDS), dipropyl disulphide (DPDS) and dibutyl disulphide (DBDS), at a temperature of between 300 and 1100° C. for a period of time between 0.5 and 12 hours said stream containing less than 20,000 ppm of impurities with respect to the total amount of the additive wherein the impurities are selected from the group consisting of dimethyl disulphide, dimethyl sulphide, methyl mercaptan and ethyl mercaptan.