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. 31, 1981
Filed:
Apr. 21, 1980
Stylianos Sifniades, Madison, NJ (US);
Meir Lahav, Berkeley Heights, NJ (US);
William J Boyle, Jr, Warren, NJ (US);
Allied Chemical Corporation, Morris Township, Morris County, NJ (US);
Abstract
A racemic mixture of D- and L- forms of alpha-aminocaprolactam ('ACL') dissolved in e.g. ethanol is resolved, and preferably the undesired form remaining is solution is simultaneously racemized, by forming a supersaturated solution of the D,L-(ACL).sub.3 NiCl.sub.2. EtOH complex; providing an optically active form of lysine (e.g. L-lysine) as crystallization inhibitor of the undesired enantiomer of said complex (e.g. the D-form), and crystallizing a portion of the desired form of the complex from the solution. The undesired form remaining in solution can be simultaneously racemized by providing a strong base and an excess of ACL over the stoichiometric proportion required to form the complex. The recovered crystals of the desired form of the complex can be processed to afford the desired form of ACL, and to recover the nickel reagent. The ACL can be converted to the desired form of lysine, a nutritionally valuable amino acid.