Use of steam eductor to supply oxygen for oxidative reheating in

Details Use of steam eductor to supply oxygen for oxidative reheating in Use of steam eductor to supply oxygen for oxidative reheating in

1989-12-20

1991-08-27

Garvin, Patrick P.

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce aromatic

585324, 585443, 585444, 585621, 585624, 585658, C07C 5327

Patent

active

050435000

ABSTRACT:
A dehydrogenation process, where a hydrocarbon feed is dehydrogenated in a dehydrogenation zone and then oxidatively reheated by the combustion of hydrogen in an oxidation zone containing an oxidation catalyst, is improved by using a stream of dilution steam as an educing fluid to draw oxygen into contact with the effluent from the dehydrogenation zone ahead of the oxidation zone. A stream of dilution steam is often combined with the dehydrogenation zone effluent in order to control the oxygen concentration ahead of the oxidation zone and to lower the hydrogen partial pressure. Educing the oxygen-containing gas for the oxidation zone into the process by using the dilution steam an an educing fluid eliminates the need for compression of the oxygen-containing gas and prevents oxygen from contacting the dehydrogenation zone effluent before the dilution steam is admixed therewith. This process is particularly beneficial in the dehydrogenation of ethylbenzene to produce styrene.

REFERENCES:
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patent: 3502737 (1970-03-01), Ghublikian
patent: 3515766 (1970-06-01), Root et al.
patent: 3855330 (1974-12-01), Mendelsohn et al.
patent: 4150064 (1979-04-01), Miklas
patent: 4152393 (1979-05-01), Callahan
patent: 4778941 (1988-10-01), Tagamolila

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