Process to make finished base oils and white oils from dewaxed bulk base oils
AssigneeChevron U.S.A. Inc.
InventorsKenny Peinado, Jay Parekh, Jifei Jia, Yihua Zhang, Guan-Dao Lei, Guang Zhang
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Abstract
Provided in one embodiment is an improved and more flexible process for preparing a finished base oil or a white oil product comprising passing a dewaxed base oil product to a distillation column and separating the dewaxed base oil product into fuel and base oil product streams. The base oil product streams are tested to determine if they meet desired specifications. Base oil product streams that meet the desired minimum base oil specifications are passed to a hydrofinishing reactor to prepare a white oil product, or passed to direct sale.
Claims10
A process for preparing a white oil product comprising:
- a) passing a dewaxed base oil product to a distillation column and separating the dewaxed base oil product into diesel fuel and base oil products;
- b) testing the base oil products to determine if they meet minimum desired specifications;
- c) passing a base oil product which meets the desired specifications to a hydrofinishing reactor to then meet white oil specifications;
- and
- d) collecting a base oil stream from the hydrofinishing reactor and testing for UV absorbance (ASTM D2269);
- wherein the base oil products include XLN base oil having a kinematic viscosity at 100° C. between about 1.8 cSt and about 3.5 cSt, LN base oil having a kinematic viscosity at 100° C. between about 3.0 cSt and about 6.0 cSt, and MN base oil having a kinematic viscosity at 100° C. between about 5.0 cSt and about 15.0 cSt.
A process for preparing base oil from a waxy hydrocarbon feedstock comprising:
- a) contacting the hydrocarbon feedstock in a hydroismerization zone under hydroisomerization dewaxing conditions;
- b) collecting a dewaxed product stream from the hydroisomerization zone and passing the product streams to a distillation column;
- c) separating the dewaxed product stream into fuel and base oil products in the distillation column;
- d) testing the base oil products to determine if they meet minimum desired specifications, wherein the testing comprises one or more tests of cloud point, Noack, pour point, viscosity, aromatic content, or viscosity index;
- e) passing a base oil product which meets the minimum desired specifications for a base oil product to a hydrofinishing reactor to meet more stringent specifications, or to a further use or direct sale;
- and
- f) passing any base oil product which does not meet a minimum desired specification for a base oil product to a hydroisomerization dewaxer, to further processing, a further use, or direct sale;
- wherein the base oil products include XLN base oil having a kinematic viscosity at 100° C. between about 1.8 cSt and about 3.5 cSt, LN base oil having a kinematic viscosity at 100° C. between about 3.0 cSt and about 6.0 cSt, and MN base oil having a kinematic viscosity at 100° C. between about 5.0 cSt and about 15.0 cSt;
- wherein, a base oil product stream is passes to a hydrofinishing reactor and a hydrofinished product is collected from the reactor and tested for readily carbonizable substances.
Dependencies are inferred from the claim text.