C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 5/333 (2006.01)
Patent
CA 2491252
A process for the catalytic dehydrogenation of a first unsaturated hydrocarbon to form a second unsaturated hydrocarbon which has one olefinically unsaturated bond more than the first unsaturated hydrocarbon and otherwise an unchanged carbon skeleton, which process comprises: contacting in a first step a feed comprising the first unsaturated hydrocarbon with a first dehydrogenation catalyst having a temperature parameter T1 and a selectivity parameter S1, and contacting in a second step a reaction product of the first step comprising the first unsaturated hydrocarbon and the second unsaturated hydrocarbon with a second dehydrogenation catalyst having a temperature parameter T2 and a selectivity parameter S2, such that T1 < T2 and S1 < S2.
L'invention concerne la déshydrogénation catalytique d'un premier hydrocarbure non saturé pour former un second hydrocarbure non saturé comportant une liaison saturée en oléfine de plus que le premier hydrocarbure, et sinon un squelette de carbone inchangé. Le procédé comporte les étapes suivantes: contact entre une charge renfermant le premier hydrocarbure non saturé, et un premier catalyseur de déshydrogénation à paramètre de température T¿1? et paramètre de sélectivité S¿1?, puis contact entre un produit de réaction de la première étape renfermant les deux hydrocarbures, et un second catalyseur de déshydrogénation à paramètre de température T¿2? et paramètre de sélectivité S¿2?, de sorte que T¿1? < T¿2? et S¿1? < S¿2?.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Shell Internationale Research Maatschappij B.v.
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