The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 2001
Filed:
Mar. 10, 1999
Aharon Meir Eyal, Jerusalem, IL;
Nadjda Cohen-Sydov, Jerusalem, IL;
Abstract
The invention provides a process for the separation of amino acids and their salts from impurities contained in an aqueous feed solution containing the same, the process comprising: a) bringing the feed solution into contact with a substantially immiscible extractant phase comprising an amine and an acid, both of which are substantially water immiscible in both free and salt forms, to extract amino acid and salts thereof in the phase, wherein the extraction is carried out while the feed solution is within two pH units of the initial pH of the feed solution; and b) backwashing the extractant phase with a substantially neutral aqueous system to recover substantially all of the extracted amino acid and the extracted salts thereof.