208 / | HD | MINERAL OILS: PROCESSES AND PRODUCTS |
46 | DF | CHEMICAL CONVERSION OF HYDROCARBONS {11} |
49 | DF | .~ Plural serial stages of chemical conversion {6} |
67 | DF | .~.~ First stage is thermal or catalytic cracking {4} |
69 | .~.~.~ With subsequent reforming {1} | |
70 | DF | .~.~.~.~> Catalytic reforming |