Process using a supercritical fluid for regenerating synthetic organic polymeric adsorbents and wastewater treatment embodying the same
US4061566A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1976 |
| Grant date | Dec 6, 1977 |
| Priority date | — |
| Expiry date | Apr 15, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/523
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An adsorbate is removed from a polymeric adsorbent by contacting the adsorbent with a supercritical fluid which is a solvent for the adsorbate. The supercritical fluid containing the dissolved adsorbate is then subjected to a physical treatment which renders the supercritical fluid a nonsolvent for the adsorbate and makes it possible to remove the adsorbate from the supercritical fluid. The supercritical fluid is then subjected to another physical treatment to restore it to a state wherein it is a solvent for the adsorbate so that it may be reused. The process is particularly suitable for adsorbent regeneration in the treatment of wastewaters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.