Process for culturing a microalga, and extracting a polysaccharide therefrom
US4417415A · kind A · utility
48Cited by
13References
38Claims
0Family size
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Key dates
| Filing date | Apr 26, 1982 |
| Grant date | Nov 29, 1983 |
| Priority date | — |
| Expiry date | Apr 26, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N1/12
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
Porphyridium cruentum is cultured in an enriched seawater medium using a high initial cell concentration until the productivity of polysaccharide production by the alga is maximized. The whole culture is then extracted by making the culture strongly alkaline, and heat treating it. The culture is cooled, acidified and the polysaccharide precipitated by addition of a water-miscible organic solvent such as ethanol. Very high yields of polysaccharide are obtained, in excess of 4.5 grams per liter of culture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.