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:
Apr. 25, 2000
Filed:
Nov. 19, 1996
Junning Ma, North Wales, PA (US);
Robert C Corcoran, Laramie, WY (US);
Abstract
A process for extracting morphine from opium is described. In the process, opium is extracted with a basic alcoholic solution. The basic alcoholic solution is filtered and the alcohol removed from the filtrate to leave a residue. The residue is then extracted with a basic aqueous solution having a pH of at least 11. The basic aqueous solution may be filtered to remove any solid matter remaining after the aqueous extraction step, and then be stirred with a sufficient amount of a salt to avoid emulsion formation. The basic aqueous solution or filtrate is then extracted with benzene or toluene. Next, adjusting the pH of the basic aqueous filtrate to pH 8.5 to 9.5 allows the morphine to precipitate and be recovered.