Patent ID: 7419602
Filing Date: 2008-09-02
Classification: C02F,Y10S

Abstract:
1. A process comprising: adding a ferric salt to a feed stream comprising water and selenocyanate to thereby form a first intermediate stream, wherein at least about 0.003 milligrams of said ferric salt are added to said feed stream; adding a cupric salt to said first intermediate stream to thereby form a second intermediate stream; adjusting the pH of said second intermediate stream to a pH value in the range of from about 6.5 to about 8.0 in order to maximize the reaction of said cupric salt with said selenocyanate to thereby form a copper-adding a polymer to said second intermediate stream for flocculation with said copper-and-selenium-containing precipitate thereby forming a third intermediate stream comprising floccules of said polymer and said copper-and-selenium-containing precipitate; and-selenium-containing precipitate; and removing said floccules-and-selenium-containing floccules from said third intermediate stream to thereby form a treated water stream.