TH85002A - Process oils, Asphalt-degreased oil production methods, Extracts manufacturing methods and Process oils. - Google Patents

Abstract

DC60 (15/08/49) This invention relates to process oils that use deasphalt-removed oil as a feedstock, obtained by removing asphalt from the residue of the vacuum distillation of crude oil, and methods for producing process oils. These process oils are characterized by: (a) polycyclic aromatic (PCA) content less than 3% by mass; (b) viscosity (100 °C) 40 to 70 mm²/s; (c) aniline point 85 to 100 °C; (d) flash point 250 °C or higher; (e) aromatic hydrocarbon content 40 to 55% by mass; and (f) polar content 10 to 15% by mass. This invention also relates to process oils and methods for producing process oils. These process oils are obtained by combining: an extract obtained by deasphalt removal and the extraction of the residue of the vacuum distillation of crude oil with a solvent; And a base lubricating oil containing less than 3% mass of polycyclic aromatic (PCA), and having the following properties: (a) polycyclic aromatic (PCA) content less than 3% mass; (i) viscosity (100 °C) 30 to 80 mm²/s; (j) aniline point 90 °C or lower; (k) flash point 240 °C or higher; (l) benzo(a) pyrene content 1 ppm mass or less; (m) specific aromatic compound content 10 ppm mass or lower; and (n) polar compound content 10 to 30% mass. This invention relates to process oils that use deasphalt-removed oil as a feedstock, obtained by removing asphalt from the residue of crude oil during vacuum distillation, and the method of producing process oils, and the process oils have the following properties: (a) polycyclic aromatic (PCA) content less than 3% mass; (b) viscosity (100°C) 40 to 70 mm²/s; (c) aniline point 85 to 100°C; (d) flash point 250°C or higher; (e) aromatic hydrocarbon content 40 to 55% by mass; and (f) polar substance content 10 to 15% by mass. This invention also relates to process oils and methods for producing process oils, process oils obtained by blending: extracts obtained by asphalt removal and oil extracts remaining from the vacuum distillation of crude oil with solvents; and base lubricating oils with a polycyclic aromatic (PCA) content of less than 3% by mass, and having the following properties: (a) polycyclic aromatic (PCA) content of less than 3% by mass; (i) viscosity (100°C) 30 to 80 mm²/s; (j) Aniline point 90°C or lower; (k) Flash point 240°C or higher; (l) Benzoate content; (a) Pyrene 1 ppm (mass) or less; (m) Specific aromatic compound content 10 ppm (mass) or lower; and (n) Polar compound content 10 to 30% (mass).

Claims (19)

1. Process oils that use deasphalt-removed oil as a feedstock, obtained by removing asphalt from the residue of crude oil during vacuum distillation, possess the following properties: (a) polycyclic aromatic (PCA) content less than 3% by mass; (b) viscosity (100°C) 40 to 70 mm²/s; (c) aniline point 85 to 100°C; (d) flash point 250°C or higher; (e) aromatic hydrocarbon content 40 to 55% by mass; and (f) polar compound content 10 to 15% by mass. 2. Process oil as per claim 1, comprising additional properties: (g) Pour point of 40°C or lower. 3. Process oil as per claim 1 or 2, where this process oil exhibits an ASTM color density of 8.0 or lower when diluted with toluene in a volume equal to 60 times the volume of the process oil. 4. Process oils according to any one of the claims 1-3, with the following additional properties: (h) Anileon point 85 to 95 degrees C. 5. Process oils obtained by blending: extracts obtained by asphalt removal and residual oil extraction from vacuum distillation of crude oil; and base lubricating oils with polycyclic aromatic (PCA) content less than 3% mass, these process oils possess the following properties: (a) polycyclic aromatic (PCA) content less than 3% mass; (i) viscosity (100 °C) 30 to 80 mm²/s; (j) aniline point 90 °C or lower; (k) flash point 240 °C or higher; (l) benzo(a) pyrene content 1 ppm mass or less; (m) specific aromatic compound content 10 ppm mass or lower; and (n) polar compound content 10 to 30% mass. 6. Process oils as per claim 5, with additional properties: (o) An aniline point of 60 to 90 degrees C. 7. The process oil production method consists of: a deasphalt removal step to remove asphalt from the residual oil after vacuum distillation of crude oil, resulting in deasphalt-removed oil; and a solvent extraction step to extract the deasphalt-removed oil using a solvent to obtain an extract with a yield of 50% by mass or higher of the deasphalt-removed oil. This extract is classified as process oil. 8. The process oil production method consists of: a deasphalt removal step to remove asphalt from the residual oil after vacuum distillation of crude oil to obtain deasphalt-removed oil; and a solvent extraction step to extract the deasphalt-removed oil using a solvent to obtain an extract; where the extract obtained in the solvent extraction step and one compound selected from a group consisting of the deasphalt-removed oil obtained in the deasphalt removal step and mineral oil with less than 3% mass of polycyclic aromatic acid (PCA) are blended to obtain a blended oil. This blended oil is classified as the process oil. 9. The process oil production method consists of: a deasphalt removal step to remove asphalt from the remaining oil after vacuum distillation of crude oil, resulting in asphalt-free oil; a dewax removal step to remove wax from the deasphalt-free oil, resulting in wax-free oil; and a solvent extraction step to extract the wax-free oil using a solvent to obtain an extract yielding 50% by mass or higher of the deasphalt-free oil. This extract is considered the process oil. 10. The process oil production method consists of: a deasphalt removal step to remove asphalt from the residue after vacuum distillation of crude oil to obtain deasphalt-removed oil; a dewax removal step to remove wax from the deasphalt-removed oil to obtain dewax-removed oil; and a solvent extraction step to extract the dewax-removed oil with a solvent to obtain an extract. The extract obtained in the solvent extraction step and at least one selected compound from a group consisting of the dewax-removed oil obtained in the dewax removal step and a mineral oil with less than 3% mass of polycyclic aromatic acid (PCA) are blended to obtain a blended oil. This blended oil is classified as the process oil. 11. Production methods pursuant to claims 8 or 10, where the amount of extract in the oil blend ranges from 40% by mass to less than 80% by mass. 12. Any of the production methods under claim 7-11, where the yield of deasphalt-removed oil obtained in the deasphalt-removal step is 30% by mass or higher of the oil remaining after vacuum distillation, and the viscosity (100°C) of the deasphalt-removed oil is 30 to 50 mm²/s. 13. Any of the production methods under claims 9-12, where the pour point of the dewaxed oil obtained in the dewaxing step is 0 to 25°C, and the yield of the dewaxed oil is 90% by mass or greater of the deasphalted oil. 14. Any of the production methods under claims 7-13, where the extraction temperature in the solvent extraction step is 80 to 150 °C, and the solvent ratio is 2.0 to 12.0. 15. A method for producing deasphalt oil using the residue oil from vacuum distillation of crude oil as a feedstock. This deasphalt oil has the properties (a), (l), and (m) below. The method consists of: removing asphalt from the residue oil from vacuum distillation using a propane solvent or a butane and propane mixed solvent under the conditions: solvent ratio 4.5 to 6; column peak temperature 85 to 100 °C; and a yield for the deasphalt oil of 30 to 40% by volume. The properties are: (a) polycyclic aromatic (PCA) content less than 3% by mass; (l) benzo(a) pyrene content 1 ppm by mass or less; and (m) specific aromatic compound content 10 ppm by mass or less. 16. Method for producing an extract using deasphalt-removed oil as a raw material. The asphalt has been removed from the oil remaining after vacuum distillation of crude oil. This extract has the properties (l) and (m) below. The method consists of: extraction of the deasphalt-removed oil with a solvent under the conditions: extraction temperature 80 to 150°C; and solvent ratio 2.0 to 15.0. The properties are: (l) benzoate content (a) pyrene 1 ppm mass or less; and (m) specific aromatic hydrocarbon content 10 ppm mass or less. 17. The process oil production method consists of: a deasphalt removal step to remove asphalt from the residue after vacuum distillation of crude oil to obtain deasphalt-removed oil; and a solvent extraction step to extract the deasphalt-removed oil using a solvent to obtain an extract; where the extract obtained in the solvent extraction step and the base lubricant have a polycyclic aromatic acid (PCA) content of less than 3% by mass, are blended to obtain a blended oil, which is classified as process oil. 18. Manufacturing method according to claim 17, whereby this base lubricant has the following properties: (p) viscosity (100°C) 5 to 40 mm/s; (q) aniline point 75 to 120°C; (r) flash point 200°C or higher; (l) benzo(a) pyrene content 1 ppm mass or less; and (m) specific aromatic compound content 10 ppm mass or less. 19. Manufacturing methods pursuant to claims 17 or 18, where the volume mixing ratio of the extract and the base lubricant is 95/5 to 60/40.