Patent ID: RE41390

Claim:
A method of preparing a trace element solution, said method consisting essentially of the steps of: (a) preparing a single solution comprising more than one EDTA-complex as a sodium salt in a single continuous process by suspending either disodium EDTA in water or suspending EDTA acid in water with sodium hydroxide, and adding a adding at least one metal compound selected from the group consisting of metal oxides, metal hydroxides and metal carbonates to the EDTA solution to form the EDTA-complex , wherein the at least one metal compound comprises at least chromium ; and (b) adding sodium selenite to the solution of EDTA-complexes to form the trace element solution in which the molar ratio of selenium in the form of sodium selenite to the metal compounds to the EDTA complexes varies between 1:4.8:4.8 and 1:19:19.