C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
C10G 73/02 (2006.01) C10G 65/00 (2006.01) C10G 73/06 (2006.01)
Patent
CA 2710993
A process for preparing basestocks having superior low temperature properties at high viscosity index (VI). More particularly, a waxy feedstock is contacted with a first dewaxing catalyst having a refined constraint index (CI*) 2.0 or less followed by contacting with a second dewaxing catalyst having a refined constraint index greater than 2Ø
L'invention porte sur un procédé de préparation d'huiles de base ayant des propriétés supérieures à basse température à un indice de viscosité élevé (VI). Plus particulièrement, une charge d'alimentation cireuse est mise en contact avec un premier catalyseur de déparaffinage ayant un indice de contrainte raffiné (CI*) d'au plus 2,0, cette étape étant suivie par la mise en contact avec un second catalyseur de déparaffinage ayant un indice de contrainte raffiné supérieur à 2,0.
Daage Michel A.
Larkin David W.
Murphy William J.
Borden Ladner Gervais Llp
Exxonmobil Research And Engineering Company
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