Patent ID: 7419606
Filing Date: 2008-09-02
Classification: C02F,Y10S

Abstract:
1. A process comprising contacting a feed stream comprising water and at least about 1000 ppb of a selenium compound including selenite with a composition consisting essentially of sulfur and a porous support selected from the group consisting of alumina and carbon for removal of at least a portion of said selenium compound from said feed stream thereby forming a treated stream comprising less selenium than said feed stream; wherein said feed stream is contacted with a sufficient quantity of said composition such that said treated stream contains less than or equal to about 30 wt. % of the selenium contained in said feed stream, on an elemental selenium basis, and said contacting of said feed stream with said composition is at a pH between about 1 to about 8.5, and is in the presence of an activating agent selected from the group consisting of ammonium sulfite, sodium sulfite, potassium sulfite, H 2 SO 3 , sulfur dioxide, and combinations thereof.