* Moreover, it took energy, of course. Some unreacted stuff had to get distilled before sending it through the conversion cycle again, and how could that happen without burning carbon? Meanwhile, “the spent oxidation gas stream must be scrubbed to remove residual cyclohexane, but afterwards will still contain CO, CO2 and volatile hydrocarbons (especially propane, butane, and pentane).” It could be “catalytically abated,” but wiser heads burned it, so that its energy got “recovered,” while more carbon dioxide rose to heaven. Other hydrocarbon-laced “waste streams” could be sold to paper manufacturers.