Method for improving the pour-point of paraffin feedstock...

Details Method for improving the pour-point of paraffin feedstock... Method for improving the pour-point of paraffin feedstock...

C - Chemistry, Metallurgy

10

G

C10G 45/64 (2006.01)

Patent

CA 2272143

The invention concerns a method for improving the pour-point of a feedstock containing paraffin of more than 10 carbon atoms, whereby the feedstock to be treated is contacted with a catalyst containing NU-86 zeolite and at least a hydro-dehydrogenizing element, at a temperature between 170 and 500 ·C, pressure between 1 and 250 bars and a horary volume velocity between 0.05 and 100 h?-1¿, in the presence of hydrogen at the rate of 50 to 2000 l/l of feedstock. For heavy feedstock, the resulting product is fractionated for producing at least a fraction containing at least a middle distillate with reduced pour-point, and a residue containing the oil bases with reduced pour-point and high viscosity index. Preferably the NU-86 zeolite is dealuminized.

L'invention concerne un procédé pour améliorer le point d'écoulement d'une charge comportant des paraffines de plus de 10 atomes de carbone, dans lequel la charge à traiter est mise au contact d'un catalyseur comprenant la zéolithe NU-86 et au moins un élément hydro-déshydrogénant, à une température comprise entre 170 et 500 ~C, une pression entre 1 et 250 bar et une vitesse volumique horaire entre 0,05 et 100 h-1, en présence d'hydrogène à raison de 50 à 2000 l/l de charge. Pour des charges lourdes, le produit obtenu est fractionné pour produire au moins une coupe incluant au moins un distillat moyen à point d'écoulement réduit, et un résidu incluant les bases huiles à point d'écoulement réduit et indice de viscosité élevé. De préférence la zéolithe NU- 86 est désaluminée.

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