| 摘要 |
Organic compounds, especially hydrocarbons, are oxidatively dehydrogenated by contacting them with an oxygen-containing gas and steam under dehydrogenation conditions, and, following this reaction, the oxygen concentration in the organic portion of the effluent stream is maintained below the combustible limit by the addition of a stream recycled from a downstream purification step responsive to measurement of the oxygen concentration in the organic effluent stream from which the bulk of the water vapor has been removed. In one embodiment, hydrocarbons are oxidatively dehydrogenated by contacting with steam and an oxygen-containing gas over a catalyst, following which water is condensed from the effluent and it is diluted with a recycled diolefin concentrate stream responsive to the oxygen concentration in the gas phase of the effluent separation vessel so as to regulate the residual oxygen concentration in the hydrocarbon portion of the effluent to a safe value below 9.5 mole percent.
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