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. 12, 1999
Filed:
Dec. 11, 1997
Hao V Phan, Columbia, SC (US);
Robert E Young, West Columbia, SC (US);
Albemarle Corporation, Richmond, VA (US);
Abstract
Sodium (S)-2-(6-methoxy-2-naphthyl)propionate of at least 99% chiral purity is formed from (S)-2-(6-methoxy-2-naphthyl)propionic acid having a chiral purity of at least about 82%, but below 99%. This is done by distilling a two-phase mixture formed from (i) the (S)-2-(6-methoxy-2-naphthyl)propionic acid, (ii) water, (iii) sodium hydroxide, sodium oxide and/or at least one basic inorganic sodium salt in an amount proportioned to neutralize from about 50 to about 99% of said acid, and optionally but preferably, (iv) an inert organic solvent that has a boiling point of at least 95.degree. C. at 760 mm Hg such that water is removed from said mixture, and a pot residue containing sodium (S)-2-(6-methoxy-2-naphthyl)propionate of at least 99% chiral purity is formed.