Selective extraction using mixed solvent system

Details Selective extraction using mixed solvent system Selective extraction using mixed solvent system

C - Chemistry, Metallurgy

10

G

C10G 21/00 (2006.01) C10G 21/06 (2006.01) C10G 21/14 (2006.01) C10G 21/16 (2006.01) C10G 21/20 (2006.01) C10G 21/30 (2006.01) C10G 45/00 (2006.01) C10G 67/00 (2006.01) C10G 67/04 (2006.01)

Patent

CA 2379510

A method for concentrating the amount of alkylated mono-aromatics in a lubricating oil feedstock useful as a feedstock for sulfonation. The method comprises extracting a feedstock rich in aromatics with a solvent selected from NMP, phenol and furfural, said feedstock containing sufficient water to provide a raffinate having a target VI between about 86 and 97 under extraction conditions of treat and temperature selected to achieve the target VI. The raffinate is then hydrofined and solvent dewaxed.

Procédé servant à concentrer la quantité de constituants mono-aromatiques alkylés dans une charge d'huile lubrifiante utile en tant que charge de sulfonation. Ce procédé consiste à extraire une charge riche en constituants aromatiques au moyen d'un solvant sélectionné dans NMP, phénol et furfural, ladite charge contenant suffisamment d'eau pour produire un raffinat possédant un VI cible entre 86 et 97 dans des conditions d'extraction, de traitement et de température sélectionnées de façon à atteindre le VI cible. Le raffinat est ensuite hydrotraité et déparaffiné au solvant.

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