Method for preparing high-purity crystalline lactulose
US5003061A · kind A · utility
8Cited by
12References
4Claims
0Family size
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Key dates
| Filing date | Jan 11, 1988 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Jan 11, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P1/16
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for preparing high-purity crystalline lactulose and the product obtained by the method, which comprises crystallization from aqueous solutions at a temperature of 5.degree.-40.degree. C., the starting aqueous solution having a lactulose concentration of 50-80% w/w, a lactose concentration of less than 5% of the lactulose concentration by weight, a galactose concentration of less than 5% of the lactulose concentration by weight, and a concentration of other sugars of less than 4% of the lactulose concentration by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.