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:
May. 03, 2022
Filed:
May. 05, 2016
Phillert Trust, Pretoria, ZA;
Tabani Mtombeni, Pretoria, ZA;
Johannes Philippus Maree, Pretoria, ZA;
PHILLERT TRUST, Gauteng, ZA;
Abstract
A process to treat water includes adding a salt-forming base to the water thereby producing saline water, or thereby forming a salt in the water which is different from a salt that the water started out with, if the water started out as saline. The saline water is treated, at a temperature Twhich is above the saturation temperature of the saline water, in a first membrane separation stage to provide clean water and a first brine, the salinity of the first brine being higher than the salinity of the saline water. The first brine is cooled to a temperature Tto precipitate some of the salt from the first brine and the precipitated salt is separated from the first brine producing a second brine, the temperature Tbeing below the temperature Tbut above the freezing temperature of the first brine. The second brine is treated at a temperature Tabove the saturation temperature of the second brine in a second membrane separation stage to provide clean water and a third brine. The salt-forming base, the temperature Tand the temperature Tare selected so that the salt which is formed in the saline water has a solubility in water at the temperature Twhich is at least 1.5 times the solubility of the salt in water at the temperature T