Method for purifying by nanofiltration an aqueous sugary solution containing monovalent and polyvalent anions and cations
US7067014B2 · kind B2 · utility
2Cited by
6References
20Claims
0Family size
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Key dates
| Filing date | Aug 27, 2003 |
| Grant date | Jun 27, 2006 |
| Priority date | — |
| Expiry date | Aug 27, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2311/2623
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A purification method employs nanofiltration of an aqueous solution containing one or several sugars, multivalent cations, monovalent metal cations, monovalent anions and multivalent inorganic anions and/or organic acid anions. The method includes replacement of at least a part of said multivalent cations and/or said multivalent inorganic anions and organic acid anions respectively by monovalent metal cations and/or monovalent anions to produce a solution. Nanofiltration of the solution is carried out to obtain a retentate, and at least part of the retentate is subject to crystallization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.