for reaction with an oxidant other than air C06B Fuels for generating pressure gas, e.g. for airbags or for propulsion of rockets C06D 5/00 Cracking hydrocarbon oils, production of liquid hydrocarbon mixtures, e.g. by destructive hydrogenation, oligomerisation or polymerisation, recovery of hydrocarbon oils from oil-shale, oil-sand, or gases, refining mixtures mainly consisting of hydrocarbons and