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:
Sep. 18, 2001
Filed:
Mar. 24, 2000
W. S. Winston Ho, Lexington, KY (US);
Bing Wang, Richmond, VA (US);
Commodore Separation Technologies, Inc., New York, NY (US);
Abstract
The present invention provides a novel class of extractants and a method of manufacture for the extractants. The extractants are useful for the removal and recovery of metals from waste waters and process streams. The removal process utilizes a combination of a supported liquid membrane (SLM) and a strip dispersion to improve extraction of the target species while increasing membrane stability and reducing processing costs. The new class of extractants include dialkyl phosphoric acids containing alkyl chains of at least 8-12 carbon atoms. The method of manufacture includes mixing phosphorus pentasulfide with an alcohol, followed by hydrolysis of the intermediate reactants with a mineral acid.