Carbon dioxide cleaning and separation systems
US6200393A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2000 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Aug 7, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D7/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A separation method includes (a) providing a heterogeneous separation system, the heterogeneous cleaning system comprising CO2 in a first phase and an oil in a separate second phase; (b) entraining a material to be separated in the second phase; (c) wholly or partially solubilizing the second phase in the first phase to produce a separation system in which said material to be separated is insoluble; and then (d) separating the material from the system. The separating step is preferably followed by the step of (e) recovering at least a portion of the oil. The system is useful in a variety of applications, including cleaning (particularly metal cleaning), polymerization, extraction, coating, and particle formation and treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.