Method of preparing lube base oil
The present disclosure provides a method of preparing a lube base oil. The method comprises (a) providing a feed stream, (b) separating the feed stream into at least two fraction streams comprising a first fraction stream and a second fraction stream, and (c) before or after the separating of the feed stream, introducing the feed stream or at least two fraction streams into a first and second hydro-processing treatments to produce at least two product streams, and the first product stream has a higher viscosity index (VI) than the second product stream. The present disclosure also provides a lube base oil and a lubricant composition comprising the lube base oil.
1 . A method of preparing at least two lube base oil products, the method comprising:
(a) providing a feed stream;
(b) separating the feed stream into at least two fraction streams, comprising a first fraction stream a second fraction stream, wherein the separating of the feed stream comprises solvent extraction, or adsorption, or both; and
(c) introducing the at least two fraction streams into a first hydro-processing treatment, followed by a second hydro-processing treatment to produce at least two product streams,
wherein the first product stream has a higher viscosity index (VI) than the second product stream.
2 . The method of claim 1 , wherein the feed stream comprises vacuum gas oil (VGO), de-asphalted oil (DAO), heavy coker gas oil (HCGO), unconverted oil (UCO), a distillate thereof, a premade lube base oil having the same base oil grade as the second product stream, or a combination thereof.
3 . The method of claim 1 , wherein the separating of the feed stream comprises solvent extraction, or adsorption, or both.
4 . The method of claim 1 , wherein the first hydro-processing treatment comprises hydro-treatment (HDT), or hydrocracking (HCK), or both.
5 . The method of claim 1 , wherein the second hydro-processing treatment comprises hydro-dewaxing (HDW), hydro-finishing (HDF), or both.
6 . The method of claim 1 , further comprising conducting fractional distillation after the first hydro-processing treatment.
7 . The method of claim 1 , wherein when a kinematic viscosity at 100° C. of the at least two product streams is 2 cSt or more and less than 4 cSt,
the first product stream has a viscosity index (VI) of 115 or more, and
a VI difference between the first product stream and the second product stream is at least 5.
8 . The method of claim 1 , wherein when a kinematic viscosity at 100° C. of the at least two product streams is 4 cSt or more and less than 8 cSt,
the first product stream has a VI of 130 or more, and
a VI difference between the first product stream and the second product stream is at least 5.
9 . A method of preparing at least two lube base oil products, the method comprising:
(a) providing a feed stream;
(b) introducing the feed streams into a first hydro-processing treatment to produce a treated stream, wherein the separating of the feed stream comprises solvent extraction, or adsorption, or both,
(c) separating the treated stream to produce at least two fraction streams; and
(d) introducing the at least two fraction streams into a second hydro-processing treatment to produce at least two product streams,
wherein the first hydro-processing treatment comprises hydro-treatment (HDT), or hydrocracking (HCK), or both,
wherein the second hydro-processing treatment comprises hydro-dewaxing (HDW), hydro-finishing (HDF), or both, and
wherein the first product stream has a higher viscosity index (VI) than the second product stream.
10 . The method of claim 9 , further comprising conducting fractional distillation after the first hydro-processing treatment.
11 . A method of preparing at least two lube base oil products, the method comprising:
(a) providing a feed stream;
(b) introducing the feed streams into a first hydro-processing treatment to produce a first treated stream, wherein the separating of the feed stream comprises solvent extraction, or adsorption, or both
(c) introducing the at first treated streams into a second hydro-processing treatment to produce a second treated stream, and
(d) separating the second treated stream to produce at least two product streams,
wherein the first hydro-processing treatment comprises hydro-treatment (HDT), or hydrocracking (HCK), or both,
wherein the second hydro-processing treatment comprises hydro-dewaxing (HDW), hydro-finishing (HDF), or both, and
wherein the first product stream has a higher viscosity index (VI) than the second product stream.
12 . The method of claim 11 , further comprising conducting fractional distillation after the first hydro-processing treatment.