Method of employing process oils from converted wastes in synthetic rubbers
US4399252A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 1981 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Mar 24, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/01
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Process oil is made by conversion from "waste" materials, particularly used oils, and most particularly used crankcase oils, by flash evaporation at about 250.degree. F. and filtration for removal of solids therefrom, to produce a product substantially free of water and low boiling point components and of contaminant solids, which has a flash point above 310.degree. F., or is blended with other products from the same process to produce a final product having a flash point above 310.degree. F., and an aromatic content above 10%, preferably above 20%, by weight. The product may be used generally in a wide variety of process oil applications but is most particularly adapted for use as a rubber process oil and such use is also part of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.