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. 16, 2000
Filed:
Mar. 17, 1998
Alain Dlubala, Rixheim, FR;
Paul Nosberger, Birsfelden, CH;
Roche Vitamins Inc., Nutley, NJ (US);
Abstract
The present invention provides a method of making alkali metal and alkaline earth metal salts of L-ascorbic acid 2-monophosphate comprising reacting a L-ascorbic acid 2-polyphosphate under alkaline conditions with an alkali metal or alkaline earth metal salt of L-ascorbic-acid in concentrated aqueous solution. The amount of the L-ascorbic acid salt is in molar excess of the polyphosphate and the pH value of the reaction medium is maintained in the range of from about 8 to about 11 wherein the reaction is carried out until substantially all of the polyphosphate has been consumed and only L-ascorbic acid 2-monophosphate salt is present. A further aspect of the present invention comprises spray drying the mixture obtained after completion of the reaction, cooling and dilution to a suitable viscosity. The product of the process according to the invention is suitable as an additive for human and animal foodstuffs; it is especially stable against oxidative and thermal degradation and has an especially high content of L-ascorbic acid monophosphate vis-a-vis polyphosphates and is accordingly primarily of use preferably for the nutritional enrichment of fish feed.