Patent ID: 6710079
Filing Date: 2004-03-23
Classification: C07C,C07D

Abstract:
A method of preparing amino acid chelates and complexes essentially free of interfering complex ions comprising the steps of:a) combining as a particulate blend i) a hydrated metal sulfate salt having one or more waters of hydration, ii) an amino acid ligand, and iii) calcium oxide or hydroxide, at a ratio sufficient to allow substantially all of the particulates to react forming a metal amino acid chelate, calcium sulfate, residual water, and optionally, a hydroxide complex ion, and wherein the metal amino acid chelate has a ligand to metal molar ratio from about 1:1 to 3:1;b) placing the particulate blend in an enclosed environment; and c) applying heat to the particulate blend in the enclosed environment causing the waters of hydration of the hydrated metal sulfate salt to be released into the enclosed environment thereby causing a reaction resulting in the formation of a metal amino acid chelate or complex and calcium sulfate.