Treating spent filter media
US4711728A · kind A · utility
1Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Jan 13, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D11/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for removing sorbed lubricating oil additives from siliceous filter material is provided. The process comprises forming a slurry of the additive-laden siliceous filter material and an aromatic solvent. Water is added to the slurry prior to separating the siliceous filter material from the slurry. The recovered filter material is substantially additive-free. The lubricating oil additives may be optionally recovered from the aromatic solvent by appropriate means such as distillation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.