585 / | HD | CHEMISTRY OF HYDROCARBON COMPOUNDS |
500 | DF | UNSATURATED COMPOUND SYNTHESIS {14} |
534 | DF | .~ Triple-bond product {3} |
535 | DF | .~.~ With heat conservation or using solid inert heat carrier, e.g., regenerative furnace, etc. {1} |
536 | .~.~.~ With carrier movement through reaction zone |