Alkaline regeneration of N-methyl-D-glucamine functional resins
US7811457B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2006 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Oct 22, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A20/131
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of regenerating N-Methyl-D-glu-camine-functional resin that has been used for boron-removal uses a closed recirculating loop for treating the conjugate acid salt of the N-Methyl-D-glucamine functionality of the resin. The new method reduces rinse water demand and improves pH control in a water treatment system. The new method can be used to improve the performance of boron-selective resins in stand-alone systems or as a second stage in a reverse osmosis seawater desalination system. The regeneration method is useful in any application where weakly basic anion exchange resin in the conjugate acid salt form is to be regenerated (neutralized) by alkaline treatment. Possible end use applications are in drinking water processing, agricultural water treatment, sweetener production, waste water processing, mining hydrometallurgy, and condensate polishing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.