Process for preparing high-purity lactulose syrup and the syrup obtained
US4978397A · kind A · utility
2Cited by
1References
3Claims
0Family size
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Key dates
| Filing date | Apr 27, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Apr 27, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P1/16
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for preparing high-purity lactulose by the following stages: PA0 (a) diluting with water to a concentration of 15-25% a syrup containing 45-55% of lactulose and having a lactulose content on a dry substance basis of between 74 and 82% w/w; PA0 (b) pretreating the diluted syrup with bromine or bifunctional boron resins; PA0 (c) treating the pretreated syrup from stage (b) with ion exchange resins of strong anion type under conditions such that the pH of the percolated syrup is between 8 and 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.