A catalyst for the cyclization of pentadiene - 1,3 of cyclopentene and cyclopentane, its process of preparation and method of preparation simultaneous of cyclopentene and of cyclopentane with the implementation of the said catalyst

摘要

The catalyst for the cyclization of pentadiene - 1,3 of cyclopentene and cyclopentane is present in the form of a membrane made of a 94,9 84,75 weight of palladium, 5 has 14,75 by weight of ruthenium or rhodium and 0,05 to 0,5 by weight of zinc or gallium, composed of a non-porous layer and of a porous layer willing of a same dimension, or of the two dimensions relative to the first layer, the ratio of the thicknesses of the porous layer has a non-porous layer being 1 (5 a, 25). The method of preparation of the catalyst consists in deposit at the surface of the membrane in the alloy of palladium or rhodium and ruthenium, zinc or of the gallium, allow the membrane with the zinc deposit above has a temperature of 230 to 250 c. and the membrane with the gallium deposit above has a temperature of 30 to 120 c, and then partial removal of the zinc and of the gallium surpluses. The method of obtaining simultaneous of cyclopentene and of cyclopentane is to be cyclized the pentadiene - 1,3 on the membrane is 300 - 450 c. in a stream of argon or a mixture of argon, or finally, 1996.