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:
Nov. 23, 2021
Filed:
Dec. 03, 2018
Aquatech International, Llc, Canonsburg, PA (US);
Daniel P. Bjorklund, Waukesha, WI (US);
Vinod A. Raje, Hartland, WI (US);
James M. Marlett, Menomonee Falls, WI (US);
Manish Backliwal, Brookfield, WI (US);
Richard Schoen, Hartland, WI (US);
Gregory Mandigo, DeForest, WI (US);
AQUATECH INTERNATIONAL, LLC, Canonsburg, PA (US);
Abstract
Many processes generate wastewater streams rich in sulfate and chloride. These salt components are traditionally not recovered and are discharged to the environment. The invention recovers pure water for recycle/reuse and simultaneously generates valuable pure salts of NaCl and Na2SOfor beneficial reuse, eliminating the waste stream. Process consists of the sequential crystallization of salt products with an intermediate purification step in which a chemical reactant is added to elevate levels of purity. The process is configured to simultaneously achieve zero liquid discharge.