Process for adjusting the hardness of fischer-tropsch wax by...

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 45/58 (2006.01) C10G 2/00 (2006.01) C10G 73/00 (2006.01) C10G 73/44 (2006.01)

Patent

CA 2405118

A wax blending process is disclosed which retains the desirable properties of a Fischer-Tropsch wax, while adjusting the hardness of the wax to within a desired range. The invention utilizes a synergistic effect between hard virgin Fischer-Tropsch wax and softer mildly isomerized Fischer-Tropsch wax in a blending process which allows the artisan to adjust the hardness of a wax product to within desired ranges. The process involves passing a Fischer- Tropsch wax over a hydroisomerization catalyst under predetermined conditions including relatively mild temperatures such that chemical conversions (e.g., hydrogenation and mild isomerization) take place while less than 10 % boiling point conversion (hydrocracking) occurs, thus preserving overall isomerized wax yield. At least a portion of the resulting isomerized wax is then blended with untreated hard virgin.

L'invention concerne un procédé de malaxage de la cire, qui conserve les propriétés désirées d'une cire de Fischer-Tropsch tout en adaptant la dureté de la cire selon une plage désirée. Le procédé utilise un effet synergique entre de la cire vierge dure de Fischer-Tropsch et de la cire de Fischer-Tropsch plus molle, à moitié isomérisée, dans un procédé de malaxage qui permet à l'artisan d'adapter la dureté d'un produit à base de cire selon des plages désirées. Le procédé consiste à passer de la cire de Fischer-Tropsch sur un catalyseur d'hydro-isomérisation dans des conditions préétablies, y compris à des températures relativement douces, telles que des conversions chimiques (p. ex. hydrogénation et isomérisation douce) s'effectuent à un point d'ébullition inférieur à 10 % (hydrocraquage), ce qui empêche de produire de la cire complètement isomérisée. Au moins une partie de la cire isomérisée obtenue est ensuite mélangée avec de la cire vierge dure non traitée.

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