| 摘要 |
The dehydrogenation of hydrocarbons by reaction with iodine is effected in the presence of a substance capable of binding hydrogen iodide to form an inorganic iodide such substance being present dissolved or dispersed in a molten phase comprising such inorganic iodide and oxygen is added to the reaction. The hydrogen iodide binding substance is preferably an oxide of arsenic, antimony, lead, zinc, cadmium, copper, nickel, cobalt, manganese, calcium, lithium, cerium or rare earth metals and their carbonates or hydroxides may also be present. The mol ratio of the corresponding metal iodide to hydrocarbon is 2-100:1 at any time and of oxide to iodide is 0.01-0.5:1, and the amount of oxygen used is 0.1-100 mols per mol of hydrocarbon. Temperatures of 200-1,000 DEG C. are used. The dehydrogenation, of alkanes, cycloalkanes, or arylalkanes to unsaturated or aromatic hydrocarbons with possible dealkylation and/or isomerisation are described. Oxide may be formed in situ from the iodide and oxygen and iodide may be periodically added to maintain the iodide concentration.
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