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. 14, 2014
Filed:
Nov. 02, 2005
Applicant:
Keith G. Tomazi, Florissant, MO (US);
Inventor:
Keith G. Tomazi, Florissant, MO (US);
Assignee:
Mallinckrodt LLC, Hazelwood, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 211/00 (2006.01); C07C 241/00 (2006.01); C07C 243/00 (2006.01); C07C 249/00 (2006.01); C07C 251/00 (2006.01); C09B 11/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to the economical and separation of benzphetamine hydrochloride and methamphetamine by liquid extraction. An extraction process employing a suitable organic solvent and water at a pH in the range of from about 6 to about 8 provides excellent removal of the methamphetamine by dissolution in the water phase while the benzphetamine dissolves in the organic phase. Simple separation of the two phases results in separation of the two amines.