Process oil, process for production of deasphalted oil, process for production of extract, and process for production of process oil

Abstract

Disclosed are: a process oil produced by using a deasphalted oil which is produced by deasphalting a vacuum residual oil from crude oil as a starting material, the process oil having the following properties (a) to (f) and; a process for producing the process oil: (a) polycyclic aromatic hydrocarbon (PCA) content: less than 3% by mass; (b) viscosity (at 100 DEG C): 40 to 70 mm<2> / s; (c) aniline point: 85 to 100 DEG C; (d) flash point: 250 DEG C or higher; (e) aromatic hydrocarbon content: 40 to 55% by mass; and (f) polar substance content: 10 to 15% by mass. Also disclosed are: a process oil produced by mixing an extract which is produced by deasphalting a vacuum residual oil from crude oil and then extracting the resultant product with a solvent with a lubricating base oil which has a polycyclic aromatic hydrocarbon (PCA) content of less than 3% by mass, the process oil having the following properties (a) and (i) to (n) and; a process for producing the process oil: (a) polycyclic aromatic hydrocarbon (PCA) content: less than 3% by mass; (i) viscosity (at 100 DEG C): 30 to 80 mm<2> / s; (j) aniline point: 90 DEG C or lower; (k) flash point: 240 DEG C or higher; (l) benzo(a)pyrene content: 1 ppm by mass or less; (m) content of specific aromatic hydrocarbons: 10 ppm by mass or less; and (n) polar substance content: 10 to 30% by mass.

Description

technical field [0001] The present invention relates to a process oil used in natural rubber and synthetic rubber to form a rubber composition, a raw material deasphalted oil and an extract used for the production of the process oil, and a process oil production method. Background technique [0002] Rubber materials used in tire manufacturing are usually mixed with processing oil in order to improve the mechanical properties and processability of the rubber materials. In addition to being used for rubber materials such as natural rubber and synthetic rubber, this processing oil can also be used as a plasticizer for thermoplastic resins, a component of printing inks, and a lubricating oil or solvent component for softeners of recycled asphalt, etc. . [0003] In the case of using this processing oil as an additive for rubber, the by-product extract produced when the paraffinic base oil was prepared by solvent refining has been used in the past. Carcinogenic aroma oils for r...

AI Technical Summary

Problems solved by technology

[0004] In addition, in the preparation of rubber for wheel bases, since the compatibility between processing oil and rubber is emphasized, the aromatic component in the processing oil is particularly important. However, on the other hand, if the aromatic component is considered too much, it will cause the processing oil Carcinogenicity increases, and it is necessary to remove aromatic components that are the culprit of carcinogenicity while maintaining good compatibility between processing oil and rubber

[0005] In addition, in recent years, the harmfulness of polycyclic aromatic hydrocarbons (PCA: Polycyclic Aromatics, which means the same as PAH (Polyaromatic Hydrocarbon), the same below) in processing oils has become a problem, especially processing oils used in automobile tires. Dust pollutes the environment, so it is desired to reduce PCA in processed oils, and in Europe and other regions, there are restrictions on the handling of mineral oils with a PCA content of 3% by mass or more

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