Verfahren und Vorrichtung zur Dehydrierung von aliphatischen Kohlenwasserstoffen zu olefinischen Kohlenwasserstoffen.

摘要

A process and a stationary bed device are described for the production of olefinic hydrocarbons from a charge of saturated aliphatic hydrocarbons containing 2 to 20 carbon atoms and from hydrogen in an enclosure 1 comprising a plurality of pipes 3 which are filled with a catalyst, and which are parallel and arranged in rows. A stage called reaction stage and a regeneration stage of the catalyst in the pipes of the enclosure are carried out. Heating of the pipes is produced by suitable radiant heating means 6, arranged in sheets which are substantially perpendicular to the pipes. These sheets heat a first part of the pipes (feed side) with a heat flow greater than the mean heat flow of the enclosure and a subsequent second part with a mean flow no greater than the mean heat flow, so that the isothermal condition (isothermicity) of the catalyst is substantially maintained, by virtue of suitable control means. Application to the production of isobutene.