Reaktionsgleichung
[C:1]1([CH:7]([CH3:9])[CH3:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C(C1C=CC(C)=CC=1)C.O=O>>[CH3:9][C:7]([C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1)=[CH2:8]Komponenten
Versuchsvorschrift
This example illustrates the dehydrogenation of cumene and p-ethyltoluene using a diluent comprising steam and nitrogen. Three and three-tenths of the catalyst prepared in Example I, ground to 18 to 40 mesh, was employed in the reactor described in Example I. Initially p-ethyltoluene was flowed into the reactor at 0.38 liquid hourly space velocity, 11:1 diluent to p-ethyltoluene ratio (8:1 steam and 3:1 nitrogen) at 588° C. yielding a relatively poor conversion and selectivity. The catalyst was decoked with 5% oxygen and nitrogen for about 1 hr. Cumene was then run at 0.38 liquid hourly space velocity, 11:1 diluent ratio (8:1 steam and 3:1 nitrogen) at 588° C. providing 40% conversion to alphamethylstyrene and 88% selectivity. The feed was then switched from cumene to p-ethyltoluene using the same diluent dilution and conditions providing 22% conversion to p-methylstyrene and 93% selectivity. Conditions were then changed to 0.72 liquid hourly space velocity, 10:1 diluent ratio for the p-ethyltoluene (8:1 steam and 2:1 nitrogen) at 598° C. yielding 40% conversion and 92% selectivity to p-methylstyrene.
Aufarbeitung
- customyielding a relatively poor conversion and selectivity
- customwas then run at 0.38 liquid hourly space velocity, 11:1 diluent ratio (8:1 steam and 3:1 nitrogen) at 588° C.
Quellen und Nachweise
- ORD-Eintrag
- ord-496553a6097c46dfa569c07b96b29155
- Quelldatensatz
- uspto-grants-1986_05
- Patentnummer
- US04590324
Verknüpfte Notizen
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