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:
Feb. 28, 2012
Filed:
May. 09, 2007
Andrew Patrick Murphy, Littleton, CO (US);
Saied Delagah, Denver, CO (US);
Robert Lee Riley, La Jolla, CA (US);
Andrew Patrick Murphy, Littleton, CO (US);
Saied Delagah, Denver, CO (US);
Robert Lee Riley, La Jolla, CA (US);
The United States of America as represented by the Secretary of the Interior, The Bereau of Reclamation, Washington, DC (US);
Separation Systems Technology Inc., San Diego, CA (US);
Abstract
A method is provided for producing a high flux, high salt rejection cellulose acetate desalination membrane. In this method, cellulose acetate polymer is dissolved in a first solvent such as methylene chloride or 2-methyltetrahydrofuran to produce a solution. Further steps involve stirring the solution, and thereafter permitting the solution to settle, for a time sufficient for a majority of the cellulose acetate to precipitate out of the solution to form a cellulose acetate precipitate. Next, the cellulose acetate precipitate is stirred into an excess methanol. Thereafter, the cellulose acetate is filtered out and used in making the desalination membrane.