Catalytic oxidative dehydrogenation of alkylaromatics and paraff

Details Catalytic oxidative dehydrogenation of alkylaromatics and paraff Catalytic oxidative dehydrogenation of alkylaromatics and paraff

1995-09-13

1998-07-14

Ivy, C. Warren

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

Diolefin product

C07C 509

Patent

active

057807000

ABSTRACT:
A process for the preparation of olefinically unsaturated compounds by catalytic oxidation, ie oxidative dehydrogenation by transferring oxygen from a previously oxidized oxygen carrier acting as catalyst, in the absence of molecular oxygen, the catalyst being regenerated after exhaustion, wherein, during the operating phase of the catalyst (oxidation/dehydration partial step), the residence time, space velocity and/or temperature of the reactants in the reactor is/are adjusted, ie, controlled, continuously or in discrete steps, in a manner appropiate to the momentary state of activity of the redox catalyst by adjusting--continuously or stepwise--the residence time of the reactants in the freshly regenerated catalyst (ie at the commencement of the reaction) to a shorter time, and/or the temperature to a lower value, than the corresponding parameter(s) in the partially reduced catalyst.

REFERENCES:
patent: 3118007 (1964-01-01), Kronig et al.
patent: 3440299 (1969-04-01), Woskow et al.
patent: 4396537 (1983-08-01), Eastman

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