# US 11,441,085 B2 · Process to make finished base oils and white oils from dewaxed bulk base oils > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,441,085 B2 - Document ID: US11441085B2 - Status: Granted - Kind: B2 - Application number: 17/138,009 - Filed: 2020-12-30 - Published: 2022-06-30 - Granted: 2022-09-13 - Earliest claimed: 2020-12-30 - Assignees: Chevron U.S.A. Inc. - Applicants: Chevron U.S.A. Inc. - Inventors: Kenny Peinado; Jay Parekh; Jifei Jia; Yihua Zhang; Guan-Dao Lei; Guang Zhang - Web page: https://patentgrep.com/patent/US11441085B2 ## CPC - C10G 65/043: {at least one step being a change in the structural skeleton} - C10G 67/02: plural serial stages only - C10G 45/58: to change the structural skeleton of some of the hydrocarbon content without cracking the other hydrocarbons present, e.g. lowering pour point; Selective hydrocracking of normal paraffins (C10G32/00 takes precedence; improving or increasing the octane number or aromatic content of naphtha C10G35/00) - C10M 101/02: Petroleum fractions - C10M 177/00: Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes - C10G 2300/202: Heteroatoms content, i.e. S, N, O, P - C10G 2300/302: Viscosity - C10G 2300/304: Pour point, cloud point, cold flow properties - C10G 2300/308: Gravity, density, e.g. API - C10G 2400/04: Diesel oil - C10G 2400/10: Lubricating oil - C10G 2400/14: White oil, eating oil - C10M 2203/1006: used as base material - C10N 2070/00: Specific manufacturing methods for lubricant compositions - C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES - C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33) - C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS ## 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. ## Claims ### Claim 1 A process for preparing base oil from a waxy hydrocarbon feedstock comprising: a) contacting the hydrocarbon feedstock in a hydroisomerization 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; e) passing a base oil product which meets the minimum desired specifications for a base oil to a hydrofinishing reactor to meet more stringent specifications, or to a further use or direct sale; and f) collecting a base oil product stream from the hydrofinishing reactor and testing for readily carbonizable substances. ### Claim 2 (depends on 1) A process of claim 1, wherein the dewaxed product is separated into a diesel fuel product stream and up to least four base oil product streams. ### Claim 3 (depends on 2) The process of claim 2, wherein the base oil products include XLN base oil, LN base oil, and MN base oil. ### Claim 4 (depends on 1) The process of claim 1, wherein the desired minimum specifications include pour point, viscosity and viscosity index. ### Claim 5 (depends on 1) The process of claim 1, wherein the hydrofinishing reactor comprises a hydrofinishing catalyst and the hydrofinishing catalyst comprises a silica alumina based catalyst further containing platinum and/or palladium. ### Claim 6 (depends on 1) The process of claim 1, wherein the base oil product stream collected from the hydrofinishing reactor is also tested for UV absorbance (ASTM D2269). ### Claim 7 (depends on 1) The process of claim 1, wherein the base oil stream that fails to meet the desired specifications is recycled to the hydroisomerization zone in a). ### Claim 8 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 a diesel fuel product and up to four base oil products; b) testing the base oil products to determine if they meet minimum desired specifications; and c) passing a base oil product which meets the desired specifications to a hydrofinishing reactor to then meet white oil specifications. ### Claim 9 (depends on 8) The process of claim 8, wherein the minimum desired specifications include pour point, viscosity and viscosity index. ### Claim 10 (depends on 8) The process of claim 8, wherein a product from the hydrofinishing reactor is subjected to the RCS (readily carbonizable substances) test ASTM D 565-88. ### Claim 11 (depends on 10) The process of claim 10, wherein the product is also tested for UV absorbance by ASTM D2269. ### Claim 12 (depends on 8) The process of claim 8, wherein the up to four base oil products include XLN base oil, LN base oil, and MN base oil. ### Claim 13 (depends on 8) The process of claim 8, wherein the hydrofinishing reactor comprises a hydrofinishing catalyst and the hydrofinishing catalyst comprises a silica alumina based catalyst further containing platinum and/or palladium.