Reclaiming used lubricating oil
US4381992A · kind A · utility
20Cited by
15References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1981 |
| Grant date | May 3, 1983 |
| Priority date | — |
| Expiry date | Jun 15, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M175/0016
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A novel process for the purification of used oil comprising removing the ash-forming components, then subjecting the oil to vacuum fractionation. A novel vacuum fractionation column is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.