Shell Oil Comapny

Shell Usa, Inc.

Shell Internationale Research Maatschappij, B.v.

Ralf Gunnar Meister

Cornelis Hyacinthus Maria Van Der Hulst

Nicolaas Van Dijk

Godfried Johannes Aarts

Eglantine Armelle Christiane Colette Marie Albe

José Luís Moniz Jardim

Nariman Boumendjel

A process for producing a base oil composition from a deasphalted oil (DAO) feed, where the DAO feed undergoes hydrotreating, hydrocracking, catalytically dewaxing, hydrofinishing, and fractionating to generate the base oil composition. The base oil composition includes a hazy-free at 0&#xb0; C. heavy base oil comprising (a) a kinetic viscosity ranging from 15 to 21 cSt at 100&#xb0; C., (b) a 5 viscosity index of at least 95, (c) a pour point of less than &#x2212;12&#xb0; C., (d) a cloud point of less than &#x2212;18&#xb0; C., and (e) a total aromatics content of 2 wt % or less, where the hazy-free at 0&#xb0; C. heavy base oil maintains a hazy-free appearance when stored undisturbed at 0&#xb0; C. during a test period.

Hazy-free at 0&#xb0; C heavy base oil and a process for producing

The present invention relates to a method for reducing the cloud point of a base oil with high saturates/paraffinic content to below 0&#xb0; C., wherein the method comprises subjecting said base oils to a cloud point reduction step comprising adding said base oil to a solvent mixture, wherein the solvent mixture comprises a paraffin naphtha fraction and a co-solvent to obtain a solvent treatment mixture; and subjecting the solvent treatment mixture to a solvent de-waxing step.

Haze-free base oils with high paraffinic content

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Amsterdam, Netherlands

Ralf Gunnar Meister