US2012118817A1PendingUtilityA1

Thiosulfate removal methods and systems

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Individually held — no corporate assignee on recordPriority: Jun 8, 2010Filed: Jan 25, 2012Published: May 17, 2012
Est. expiryJun 8, 2030(~3.9 yrs left)· nominal 20-yr term from priority
Inventors:Mark A. Hughes
C02F 2103/16C02F 1/283B01D 35/00C02F 1/705C01B 17/62C02F 2209/40C02F 1/66B01J 20/20C02F 2209/02C02F 1/72C02F 2301/08C02F 1/288C02F 2103/10C02F 2101/101C02F 2209/06C02F 9/00B01J 20/0262
55
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Claims

Abstract

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.

Claims

exact text as granted — not AI-modified
1 - 9 . (canceled) 
     
     
         10 . A system comprising:
 a treatment material consisting of open structured substrate impregnated with a Group 16 element; and   a solution containing thiosulfate, wherein the treatment material is configured to contact the solution and at least partially convert the thiosulfate to products including sulfite.   
     
     
         11 . The system of  claim 10 , wherein temperature of the solution is at about or less than about 70 degrees Centigrade. 
     
     
         12 . The system of  claim 10 , wherein pH of the solution is at or less than 4. 
     
     
         13 . (canceled) 
     
     
         14 . The system of  claim 10 , wherein the Group 16 element is one of sulfur, selenium or tellurium. 
     
     
         15 . The system of  claim 10 , wherein thesolution is from a sour water system. 
     
     
         16 . The system of  claim 10 , wherein the treatment material is packed in a column. 
     
     
         17 . The system of  claim 10 , wherein the solution is configured to contact and pass through the treatment material more than once. 
     
     
         18 . The system of  claim 17 , wherein the solution is configured to possess a pH at or less than 4 upon an initial pass through the treatment material, and configured to possess a pH greater than 4 upon all subsequent passes through the treatment material. 
     
     
         19 . The system of  claim 10 , wherein the impregnated substrate is in the form of one of particle, pellet or powder. 
     
     
         20 . The system of  claim 10 , wherein the open structured substrate is activated carbon.

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