Separation of ash from regenerated adsorbent
US4778598A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Feb 2, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/54
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for separating ash particles from an aqueous slurry containing a mixture of regenerated adsorbent (e.g., carbon) and ash particles includes the steps of settling the slurry to produce a solid phase including the mixture of adsorbent and ash particles and a supernatant or a clarified aqueous phase. After separation of the aqueous phase, a slurry of the solid phase is diluted with water and a dispersing agent for promoting suspension of the ash particles and an anionic polymer for promoting settling of the adsorbent particles are added. The thus-treated, dilute slurry is settled to produce an aqueous phase containing primarily suspended ash particles and a solid phase including carbon particles. After separation, the solid phase can be returned to a wastewater treatment system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.