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. 11, 2017
Filed:
Aug. 05, 2013
Massachusetts Institute of Technology, Cambridge, MA (US);
Prakash Narayan Govindan, Cambridge, MA (US);
Windsor Sung, Lexington, MA (US);
Steven Lam, Boston, MA (US);
Maximus G. St. John, Cambridge, MA (US);
John H. Lienhard, V, Lexington, MA (US);
Mohammed Mirhi, Cambridge, MA (US);
Anurag Bajpayee, Cambridge, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
Cations that can precipitate from an aqueous composition to produce scaling are sequestered by adding a multi-dentate ligand to the aqueous composition. The multi-dentate ligand bonds with the cation to form a non-scaling ionic complex; and the aqueous solution with the ionic complex is used in a process that produces substantially pure water from the aqueous composition, where the cation, absent formation of the ionic complex, is subject to scaling. The pH of the aqueous composition (or a brine including components of the aqueous composition) is then reduced to release the cation from the multi-dentate ligand; and the multi-dentate ligand, after the cation is released, is then reused in a predominantly closed loop.