Abstract:
The present invention relates to a catalytic composition which comprises a beta zeolite, a metal of group VIII, a metal of group VI B and optionally one or more oxides as carrier. The catalytic system of the present invention can be used for the hydrotreating of hydrocarbon mixtures and more specifically in the upgrading of hydrocarbon mixtures having boiling ranges within the range of 35° to 250°C, containing sulfur impurities, i.e. in hydrodesulfuration with contemporaneous skeleton isomerization and a reduced hydrogenation degree of olefins contained in said hydrocarbon mixtures, the whole process being carried out in a single step.
Abstract:
L'invention concerne un procédé de synthèse d'hydrocarbures à partir d'un mélange comprenant du monoxyde de carbone et de l'hydrogène, appelée synthèse Fischer-Tropsch en présence d'un catalyseur comprenant un support, au moins un métal du groupe VIII, ledit procédé étant caractérisé en ce qu'au moins 80% des particules métalliques du groupe VIII du catalyseur ont une taille comprise entre D- (D.0,2) et D+(D.0,2), où D représente la taille moyenne des particules métalliques. Le procédé peut être utilisé dans un réacteur en lit fixe de catalyseur ou dans un réacteur opérant en phase liquide de catalyseur.
Abstract:
Catalyst based on molibden and silicon having a surface area ranging from 20 to 400 m 2 /g and a molar ratio Mo/Si > 0.2 obtainable with a process which comprises:
a) dissolving a soluble molibden salt in an aqueous solution containing at least one basic compound selected from ammonium hydroxides having general formula (I):
R 1 R 2 R 3 R 4 N + OH - (I)
b) adding to the solution of step (a) at least one compound of silicon capable of hydrolyzing to SiO 2 ; c) gelifying and calcining the gel obtained.
Abstract:
Catalytic composition which can be used in the Fischer-Tropsch process essentially consisting of an inert carrier, cobalt in a quantity ranging from 1 to 50 % by weight, preferably from 5 to 35 % by weight, and tantalum in a quantity ranging from 0.05 % to 5 % by weight, preferably from 0.1 to 3 % by weight.
Abstract:
Reactor for chemical reactions which are carried out in triphasic systems (liquid, gas, solid) which comprises:
i) a bottom head into which the reagent gas is fed, through an inlet nozzle; ii) one or more superimposed thermal exchange sections, each of these sections being immersed in the corresponding synthesis section; iii) a head containing outlet nozzles for discharging the suspension and outlet nozzles for discharging the non-reacted gas and a group of inclined transversal diaphragms for separating the particles of liquid and/or solid drawn in.