The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 1990
Filed:
Nov. 13, 1987
Raymond Bertholet, Blonay, CH;
Pierre Hirsbrunner, Les Monts-de-Corsier, CH;
Nestec S.A., Vevey, CH;
Abstract
A double sulfate salt of 1-desoxy-(5-hydroxytryptamino)-D-fructose (DFS) and 1-methylhydantoin-2-imide (creatinine) is prepared by adding creatinine to an aqueous solution of DFS containing sulfuric acid having a pH of approximately 3. The double salt may be isolated by crystallizing it in the presence of a water-miscible solvent such as ethanol. DFS may be prepared by glycosylation of 5-hydroxytryptamine with D-glucose and then adding an excess of calcium hydroxide to the glycosylation reaction medium for precipitating DFS.CA(OH).sub.2 from which the DFS may be isolated for preparing the double salt as described above. Recycling and treatment of mother liquors enables yields to be increased.