초록 ▼

Methods to control manganese deposition in an aqueous system, which include introducing a cerium-containing composition, and optionally another deposit control agent, to the aqueous system, are described. Also described, are cerium-containing compositions that promote the manganese stabilization per

Methods to control manganese deposition in an aqueous system, which include introducing a cerium-containing composition, and optionally another deposit control agent, to the aqueous system, are described. Also described, are cerium-containing compositions that promote the manganese stabilization performance of polymeric dispersants and phosphonic acids commonly used in water treatment applications. Cerium-containing compositions that can inhibit the oxidative degradation of deposit control agents are also described.

대표청구항 ▼

What is claimed is: 1. A method of controlling manganese deposition in an aqueous system containing manganese, comprising introducing an effective amount of at least one cerium-containing composition including cerium(III) to said aqueous system to stabilize said manganese against oxidation. 2. Th

What is claimed is: 1. A method of controlling manganese deposition in an aqueous system containing manganese, comprising introducing an effective amount of at least one cerium-containing composition including cerium(III) to said aqueous system to stabilize said manganese against oxidation. 2. The method of claim 1, wherein said cerium-containing composition is a cerium(III) salt. 3. The method of claim 1, wherein said manganese deposition is a result of at least chemical oxidation. 4. The method of claim 1, wherein said manganese deposition is a result of at least halogen oxidation. 5. The method of claim 1, wherein said aqueous system is a cooling water system, a drinking water system, a waste water treatment system, a papermaking water system, a swimming facility, an irrigation system, a livestock watering facility, a humidifier, a fountain, an air scrubber, a car wash, a bottling facility, a laundry system, a filtration system, a reverse osmosis system, or a desalinization facility. 6. The method of claim 1, wherein said cerium-containing composition is an inorganic cerium compound. 7. The method of claim 1, wherein said cerium-containing composition is an organic cerium compound. 8. The method of claim 1, wherein introducing said cerium-containing composition comprises generating said cerium-containing composition in-situ, extra-situ, or both in said aqueous system by chemical reduction, electrochemical reduction, or both of a cerium(IV) compound. 9. The method of claim 1, wherein said effective amount of said cerium-containing composition is from about 0.01 to about 100 ppm. 10. The method of claim 1, further comprising introducing at least one deposit control agent to said aqueous system. 11. The method of claim 1, further comprising introducing at least one polymer-based deposit control agent to said aqueous system. 12. The method of claim 11, wherein said cerium-containing composition and said polymer-based deposit control agent are present in said aqueous system in a weight ratio range of from 100:1 to 0.01:1000. 13. The method of claim 1, further comprising introducing at least one phosphonate-based deposit control agent to said aqueous system. 14. The method of claim 13, wherein said cerium-containing composition and said phosphonate-based deposit control agent are present in said aqueous system in a weight ratio range of from 100:1 to 0.01:1000. 15. The method of claim 1, further comprising introducing at least one polymer-based deposit control agent, and at least one phosphonate-based deposit control agent to said aqueous system. 16. The method of claim 15, wherein said cerium-containing composition, said phosphonate-based deposit control agent, and said polymer-based deposit control agent are present in said aqueous system in a ratio of about 1:4:10.