| 摘要 |
An improved pyrolysis or thermal craking process wherein coke or carbon formation on the metal surfaces of the processing equipment during high temperature pyrolysis or craking of hydrocarbons is significantly reduced by using relatively small amounts of an additive mixture to the pyrolysis feedstream. This feedstream consists of hydrocarbons, such as ethane, propane, n-butane, light naphthas, heavy naphtha and gas oils, which are typically mixed with steam in pyrolysis units. The additive mixture includes polar-solvent-soluble Group IIA salts, sulfur-containing compounds and, optionally, Group IA alkali metal salts and/or phosphorous-containing compounds. |
