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US 11,566,187 B2Granted
High performance process oil based on distilled aromatic extracts
AssigneeErgon, Inc.
InventorsJohn Kristopher Patrick, Craig Alan Busbea, Edward William Casserly, Howard Don Davis
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Abstract
Naphthenic process oils are made by blending one or more naphthenic vacuum gas oils in one or more viscosity ranges with a high CA content distilled aromatic extract feedstock to provide at least one blended oil, and hydrotreating the at least one blended oil to provide an enhanced CA content naphthenic process oil. The order of the vacuum distillation and blending steps may be reversed.
Claims16
A method for making naphthenic process oils, the method comprising:
- a) blending residual bottoms from a naphthenic crude atmospheric distillation unit with a high aromatic carbon content (CA) distilled aromatic extract feedstock to provide a blended oil having at least about 10 wt. % high (CA) content feedstock based upon the weight of the blended oil, the residual bottoms having a boiling point above about 370° C., the high CA distilled aromatic extract feedstock having a viscosity-gravity constant (VGC) greater than 0.95 as determined by ASTM D2501, wherein the high CA distilled aromatic extract feedstock is obtained from solvent extraction of a paraffinic crude distillate and contains at least about 20% CA content and up to about 65% CA content;
- b) vacuum distilling the blended oil obtained from step a) to provide one or more naphthenic vacuum gas oils in one or more viscosity ranges containing at least about 40% CA plus CN content and having a viscosity gravity constant (VGC) between 0.855 and 0.895;
- and
- c) hydrotreating at least one of the one or more of the naphthenic vacuum gas oils obtained from step b) to provide an enhanced CA content naphthenic process oil;
- wherein the high CAdistilled aromatic extract feedstock and enhanced aromatic carbon (CA) content naphthenic process oil each have greater aromatic carbon (CA) content than that of a comparison oil made by similarly vacuum distilling and hydrotreating the residual bottoms alone without blending step a);
- and
- wherein the enhanced CAcontent naphthenic process oil has a reduced aniline point and an increased VGC value compared to the one or more vacuum gas oils hydrotreated alone without blending step a), wherein the reduced aniline point is between about 64° C. and about 85° C. for enhanced CA content naphthenic process oils having a viscosity between about 35 and about 85 SUS at 38° C., the reduced aniline point is between about 64° C. and about 85° for enhanced CA content naphthenic process oils having a viscosity between about 85 and about 135 SUS at 38° C., the reduced aniline point is between about 77° C. and about 98° for enhanced CA content naphthenic process oils having a viscosity between about 450 and about 600 SUS at 38° C., or the reduced aniline point is between about 90° C. and about 110° C. for enhanced CA content naphthenic process oils having a viscosity between about 1700 and about 2500 SUS at 38° C. (100° F.), as measured according to ASTM D611.
4 more elements
A method for making naphthenic process oils, the method comprising:
- a) blending naphthenic crude with a high aromatic carbon content (CA) distilled aromatic extract feedstock to provide a blended oil, the naphthenic crude containing at least about 30% naphthenic carbon (CN) content and less than about 70% paraffinic carbon (CP) content plus CA content as measured according to ASTM D2140, the high CA distilled aromatic extract feedstock containing at least 20% CA content as measured according to ASTM D2140 and having a viscosity-gravity constant (VGC) greater than 0.95 as determined by ASTM D2501, wherein the high CA distilled aromatic extract feedstock is obtained from solvent extraction of a paraffinic crude distillate and contains at least about 20% and up to about 65% CA content;
- b) atmospheric distilling the blended oil to provide one or more atmospheric gas oils in one or more viscosity ranges and residual bottoms;
- c) vacuum distilling the residual bottoms to provide one or more vacuum gas oils in one or more additional viscosity ranges, wherein the one or more naphthenic vacuum gas oils have an aniline point of about 72° C. to about 110° C. according to ASTM D611;
- and
- d) hydrotreating at least one of the one or more of the vacuum gas oils to provide an enhanced CA content naphthenic process oil;
- wherein the high CA distilled aromatic extract feedstock and enhanced CA content naphthenic process oil each have greater aromatic carbon (CA) content than that of a comparison oil made by similarly atmospheric distilling, vacuum distilling and hydrotreating the naphthenic crude alone;
- and
- wherein the enhanced CA content naphthenic process oil has a reduced aniline point and an increased VGC value compared to the one or more vacuum gas oils hydrotreated alone without blending step a), wherein the reduced aniline point is between about 64° C. and about 85° C. for enhanced CA content naphthenic process oils having a viscosity between about 35 and about 85 SUS at 38° C., the reduced aniline point is between about 64° C. and about 85° for enhanced CA content naphthenic process oils having a viscosity between about 85 and about 135 SUS at 38° C., the reduced aniline point is between about 77° C. and about 98° for enhanced CA content naphthenic process oils having a viscosity between about 450 and about 600 SUS at 38° C., or the reduced aniline point is between about 90° C. and about 110° C. for enhanced CA content naphthenic process oils having a viscosity between about 1700 and about 2500 SUS at 38° C. (100° F.), as measured according to ASTM D611.
5 more elements
Dependencies are inferred from the claim text.