Process for cleaning particulate solids
US5080721A · kind A · utility
69Cited by
30References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Feb 28, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for cleaning solids contaminated with solvent-soluble contaminants. The system, which includes both process and apparatus, comprises the use of at least two successive cleaning zones, each of which includes a slurrying stage and a centrifuge separation stage, wherein the solids to be cleaned and the solvent used for cleaning flow in countercurrent relationship to each other between the successive zones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.