Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By dehydrogenation
Patent
1993-03-25
1994-08-09
McFarlane, Anthony
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By dehydrogenation
585660, 585661, C07C 5333
Patent
active
053368290
ABSTRACT:
A continuous process for the dehydrogenation of paraffinic and olefinic hydrocarbons in the presence of a catalyst comprises circulating a charge containing said paraffinic hydrocarbons through at least two reactions zones of the moving bed type which are arranged in series, the catalyst flowing successively in each reaction zone. The catalyst which is drawn off from the last reaction zone is sent to a regeneration zone at the exit from which it is reintroduced close to the first reaction zone. The process comprises the injection of sulphur and/or at least one sulphur compound before or simultaneously to the introduction of the charge into the first reaction zone. In accordance with the process, the catalyst which is drawn off from the last reaction zone is sent into a stripping zone wherein the sulphur which it contains is removed before the catalyst is sent to the regeneration zone.
REFERENCES:
patent: 3531543 (1970-09-01), clippinger et al.
patent: 3978150 (1976-08-01), McWilliams, Jr.
patent: 4104317 (1978-08-01), Antos
Boitiaux Jean-Paul
Burzynski Jean-Pierre
de Bonneville Jean
Le Peltier Fabienne
Leger Gerard
Institut Francais du Pe'trole
McFarlane Anthony
Phan Nhat D.
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