Thiosulfate removal methods and systems
View Patent ↗Described herein is a cost effective method and system for removal of thiosulfate from a solution in-line with a process system. The method and system include passing the solution in contact with an open-structured substrate impregnated with a Group 16 element, which results in removal of thiosulfate from the solution and conversion of the thiosulfate to at least sulfite.
1. A method comprising:
flowing a solution containing thiosulfate in contact with treatment material, wherein the treatment material is an open structured substrate impregnated with a Group 16 element, wherein after the contact with the treatment material, the solution has a reduced thiosulfate concentration and the thiosulfate is partially or fully converted to products including sulfite.
2. The method of claim 1 , wherein the Group 16 element is one of sulfur, selenium or tellurium.
3. The method of claim 1 , wherein temperature of the solution is at about or less than about 70 degrees Centigrade.
4. The method of claim 1 , wherein pH of the solution is at or less than 4.
5. The method of claim 4 , further comprising raising the pH of the solution to greater than about 4 and flowing the solution through the treatment material again to remove additional toxins in solution selected from the group consisting of soft Lewis acid and borderline Lewis acid.
6. The method of claim 1 , wherein the treatment material is packed in a column.
7. The method of claim 1 , wherein the solution is in a sour water system.
8. The method of claim 1 , wherein the flowing is at a hydraulic flux of about or less than about 10 gallons per minute/ft 2 .