Olefin isomerisation process using metallic catalysts impregnated with organic sulphur-containing compounds before loading into the reactor

摘要

The invention concerns a process for the isomerisation of less substituted olefins to more substituted external olefins and/or internal olefins in the absence of diolefins, in the presence of a palladium based catalyst deposited on a support. Before loading it into the reactor, said catalyst is treated with at least one sulphur-containing compound which is dissolved in a solvent then activated in a neutral or reducing atmosphere between 20 DEG C. and 300 DEG C., 1 and 50 bars and with a VVH of 50 to 600 h-1. The catalyst, containing 0.05% to 10% by weight of sulphur, is brought into contact with the feedstock and hydrogen between 20 DEG C. and 200 DEG C., 1 and 50 bars, a VVH of 0.5 to 10 h-1 and a H2/olefin molar ratio of 0.01 to 1.