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:
Mar. 28, 2006
Filed:
Oct. 02, 1997
Aharon Meir Eyal, Jerusalem, IL;
Patrick R. Gruber, Blaine, MN (US);
Rod R. Fisher, Eden Prairie, MN (US);
Jeffrey J. Kolstad, Wayzata, MN (US);
Aharon Meir Eyal, Jerusalem, IL;
Patrick R. Gruber, Blaine, MN (US);
Rod R. Fisher, Eden Prairie, MN (US);
Jeffrey J. Kolstad, Wayzata, MN (US);
Cargill Incorporated, Wayzata, MN (US);
Abstract
The invention provides a process for the recovery of lactic acid and products thereof from an aqueous solution containing free lactic acid and at least one lactate salt at a total concentration of at least 5%, the process comprising the steps of: extracting at least 70% of the free lactic acid from the aqueous solution by contacting the solution with a basic extractant, to form a lactic acid-containing extract and a lactic acid-depleted, lactate salt-containing aqueous solution; separating the lactic acid-containing extract from the depleted aqueous solution; and stripping the extracted lactic acid from the extract by methods known per se, to form a solution of lactic acid and a stripped extractant.