Process of converting ethylbenzene to styrene by catalytic dehydrogenation
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United States of America Patent
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-
Sep 1, 1981
Grant Date -
N/A
app pub date -
Mar 11, 1980
filing date -
Mar 13, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a process of converting ethylbenzene to styrene by catalytic dehydrogenation at temperatures of about 600.degree. C. in the presence of water vapor in a tubular reactor. The heat required for the dehydrogenation is fed to the tubular reactor with a molten salt bath. The dehydrogenation is effected isothermally and in a single stage under atmospheric pressure or preferable under a subatmospheric pressure with a water vapor-ethylbenzene ratio of 1.2 to 1.5 kg of water vapor per kg of ethylbenzene. The temperature of the ethylbenzene-water-vapor mixture entering the tubular reactor is maintained 50.degree. to 100.degree. C. below the temperature of the molten salt bath.
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