Patent ID: 6121464
Filing Date: 2000-09-19
Classification: C07F

Abstract:
A process for preparing salts of ascorbyl 2-phosphoric esters of the formula I, ##STR6## where the variables have the following meanings: M is sodium, potassium, magnesium, aluminum; ##STR7## k.sym. is the valence and m are equivalents, where the product of k.multidot.m can be from 3 to 5,which comprisesa) dissolving calcium L-ascorbate-2-phosphate of the formula Ia, where P is as defined above, in an aqueous solution of ascorbyl 2-phosphoric esters of the formula II, where P.sup.1 is H.sub.2 PO.sub.3, H.sub.3 P.sub.2 O.sub.6 or H.sub.4 P.sub.3 O.sub.9, at a pH of from 0.5 to 4, ##STR8## b) removing the calcium ions from the resulting solution, c) adjusting the solution which remains to a pH of from 7 to 11 by means of sodium, potassium, magnesium or aluminum salts andd) isolating the resulting salts of the ascorbyl 2-phosphoric ester of the formula I.