| abstract |
Continuous process for the dehydrogenation of paraffinic hydrocarbons into olefinic hydrocarbons, in the presence of a catalyst, in which a charge containing said paraffinic hydrocarbons is circulated through at least two reaction zones, of the moving bed type, arranged in series, the catalyst flowing successively in each reaction zone. The catalyst withdrawn from the last reaction zone is sent to a regeneration zone at the outlet of which it is reintroduced near the first reaction zone. The process comprises an injection of sulfur and / or at least one sulfur-containing compound before or simultaneously with the introduction of the charge into the first reaction zone. According to the process, the catalyst withdrawn from the last reaction zone is sent to a stripping zone in which it is freed from the sulfur which it contains, before being sent to the regeneration zone. <IMAGE> |