Method and apparatus for the recovery and purification of organic acids
US5681728A · kind A · utility
45Cited by
22References
81Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to methods and apparatus for reducing the fouling of ion-selective membranes used in the electrodialytic purification of organic acids. More particularly, the present invention relates to the use of nanofiltration and chelating agents for removal of impurities from an organic acid-containing feed material to reduce the fouling of ion-selective membranes used in electrodialysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.