Reactor for catalytic dehydrogenation of hydrocarbons with selective oxidation of hydrogen
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United States of America Patent
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Dec 7, 1999
Grant Date -
N/A
app pub date -
Aug 5, 1997
filing date -
Dec 22, 1994
priority date (Note) -
Expired
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Abstract
A reactor for catalytic dehydrogenation of dehydrogenatable hydrocarbons, in particular C.sub.3 and/or C.sub.4 hydrocarbons, in a hydrocarbon-containing stream, with selective oxidation of hydrogen. The reactor comprises serially connected in the flow direction of the hydrocarbon-containing stream: a first catalyst zone (2), an oxygen admixing zone (3) provided with a means (5) for separate feeding of an oxygen-containing gas into the hydrocarbon-containing stream, and a second catalyst zone (4). The oxygen admixing zone (3) has a cross section area in the flow direction of the hydrocarbon-containing stream which is from 0.5% to 75% of the cross section area of each of the two catalysts zones (2, 4), so as to obtain a higher flow velocity in the oxygen-admixing zone (3) than in the catalyst zones. The means (5) for feeding oxygen-containing gas is designed to feed said gas with a flow velocity which is at least 1 m/s and is up to 200 times higher than the flow velocity of the hydrocarbon-containing stream in the oxygen-admixing zone. The oxygen-admixing zone (3) is free of catalyst at least in the region adjacent to the oxygen feeding means (5).
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