Cleaning process using carbon dioxide as a solvent and employing molecularly engineered surfactants
US5783082A · kind A · utility
83Cited by
33References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1995 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Nov 3, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D2111/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The separation of a contaminant from a substrate that carries the contaminant is disclosed. The process comprises contacting the substrate to a carbon dioxide fluid containing an amphiphilic species so that the contaminant associates with the amphiphilic species and becomes entrained in the carbon dioxide fluid. The substrate is then separated from the carbon dioxide fluid, and then the contaminant is separated from the carbon dioxide fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.