Method of making ascorbyl monophosphates

Details Method of making ascorbyl monophosphates Method of making ascorbyl monophosphates

1998-03-17

2000-05-16

Owens, Amelia

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07F 906

Patent

active

060639377

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.

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patent: 4999437 (1991-03-01), Dobler et al.
patent: 5110950 (1992-05-01), Sieb et al.
patent: 5420302 (1995-05-01), Kaiser et al.
C.H. Lee, et al., Carbohydrate Res, vol. 67, pp. 127-138 (1978).

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