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US 4,904,306 AGranted
Separation and purification of gamma cyclodextrin
AssigneeAmerican Maize-Products Company
InventorRobert N. Ammeraal
Life of this patent
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Abstract
Gamma cyclodextrin is separated and purified by a process that first precipitates the gamma cyclodextrin from solution using a gamma cyclodextrin complexant followed by a step of removing the complexant from the precipitate and then passing the resulting solution containing the gamma cyclodextrin through a chromatographic material from which the gamma cyclodextrin is eluted.
Claims3
A process for separating and purifying gamma cyclodextrin comprising the sequential steps of:
- (a) adding a precipitant to an aqueous solution containing gamma cyclodextrin;
- (b) mixing the resulting aqueous solution containing gamma cyclodextrin and said precipitant for a period of about one to six days to form a precipitate containing gamma cyclodextrin;
- (c) recovering said precipitate;
- (d) washing the recovered precipitate with water;
- (e) separating the precipitant from the washed precipitate in the presence of added water by heating;
- and
- (f) passing the resulting product containing gamma cyclodextrin through a matrix upon which a gamma cyclodextrin inclusion compound has been bound to recover a substantially pure gamma cyclodextrin.
4 more elements
Dependencies are inferred from the claim text.