Title:
A COMPOSITION AND METHOD FOR PREPARING AMINO ACID CHELATES FREE OF INTERFERING IONS
Document Type and Number:
WIPO Patent Application WO2002030948
Kind Code:
A3
Abstract:
The present invention relates to compositions and methods of preparing amino chelates that are free of interfering ions, and optionally, electrically neutral. In one embodiment, the compsosition is prepared by reacting in an aqueous solution a calcium oxide and/or hydroxide, an amino acid, and a soluble metal sulfate salt at a ratio sufficient to allow substantially all of the ions present in solution to react forming a metal amino acid chelate and an essentially inert calcium sulfate, and wherein the metal amino acid chelate has a ligand to metal molar ratio from 2:1 to 3:1. Alternatively, the composition can be prepared by reacting in an aqueous solution, a calcium oxide and/or hydroxide, an amino acid, and a soluble metal sulfate salt at a ratio sufficient to allow substantially all of the ions present in solution to react forming a positively charged metal amino acid chelate having a hydroxide counter-ion, and a calcium sulfate, and wherein the metal amino acid chelate has a ligand to metal molar ratio from 1:1 to 2:1.
Inventors:
ASHMEAD STEPHEN D
WHEELWRIGHT DAVID C
ERICSON CLAYTON
PEDERSEN MARK
WHEELWRIGHT DAVID C
ERICSON CLAYTON
PEDERSEN MARK
Application Number:
PCT/US2001/031758
Publication Date:
July 18, 2002
Filing Date:
October 10, 2001
Export Citation:
Assignee:
ALBION INT (US)
International Classes:
C07C227/16; C07C229/76; (IPC1-7): C07F1/08; C07F3/02; C07F3/06; C07F13/00; C07F15/02; C07F15/06
Foreign References:
| US5698724A | 1997-12-16 | |||
| US4830716A | 1989-05-16 | |||
| US3950372A | 1976-04-13 | |||
| US4425280A | 1984-01-10 |
Other References:
See also references of EP 1325012A4
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