Counter-current process for the rapid regeneration of ion exchange materials in an unrestrained bed
US5346623A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1992 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Mar 18, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J49/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of regenerating an ion exchanger which is used to treat a solution introduced to the ion exchanger in a downward changing direction. The ion exchanger contains a non-constrained bed of ion exchange material in the form of ion exchange granules and has a concentration profile through the ion exchange material after solution has been introduced to the ion exchanger in the charging direction. The method of regenerating comprises passing a regenerating solution upwardly through the non-constrained bed of ion exchange material in an intermittent flow manner comprising an alternating up flow of regenerating solution followed by a down flow of liquid in a direction opposite to the up flow. The duration and velocity of the up flow of regenerating solution is sufficient to lift and generate a perceptible mixing of ion exchange materials in approximately the bottom portion of the ion exchange bed, with the down flow being sufficient to seat the bed very rapidly and terminate mixing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.