Methods are disclosed to de-sulfate saline streams such as seawater, brine from seawater desalination plants, and the like. The disclosed methods can also co-produce de-ionized water and inorganic materials from such de-sulfated saline streams.
대표청구항▼
What is claimed is: 1. A method for separating sulfate from saline water to produce nearly sulfate-free saline stream and inorganic materials, said method comprising the steps of: (a) removing sulfate from said saline water by (i) mixing calcium chloride rich formation water with said saline water
What is claimed is: 1. A method for separating sulfate from saline water to produce nearly sulfate-free saline stream and inorganic materials, said method comprising the steps of: (a) removing sulfate from said saline water by (i) mixing calcium chloride rich formation water with said saline water to allow the concentration of the calcium ion to exceed the concentration of the sulfate ion in said saline water to produce intermediate concentrate; (ii) pressurizing said intermediate concentrate into a precipitator at pressure between 50 psi and 1,200 psi through at least one nozzle to produce a jet stream of said intermediate concentrate; (iii) pressurizing amine solvent or amine solvent with modifier into said precipitator at pressure between 50 psi and the critical pressure of said amine solvent or said amine solvent with modifier through at least one nozzle to form precipitates comprising gypsum from said intermediate concentrate; (iv) removing said precipitates from said intermediate concentrate by filter to produce gypsum slurry; (v) removing at least most of said amine solvent or said amine solvent with modifier from said intermediate concentrate by stripper to produce said nearly sulfate-free saline stream; (b) injecting said nearly sulfate-free saline stream into subterranean formation for hydrocarbons recovery; or (c) feeding said nearly sulfate-free saline stream into conventional seawater desalinations plants and auxiliary equipments; or (d) producing de-ionized water from said nearly sulfate-free saline stream by membrane distillation; (e) producing gypsum boards or gypsum materials from said gypsum slurry by (i) separating said gypsum slurry into moist solid gypsum and liquor stream by filter; (ii) removing at least most of remaining said amine solvent or said amine solvent with modifier from said liquor stream by stripper; (iii) recycling said liquor stream to said intermediate concentrate; (iv) molding said moist solid gypsum to produce said gypsum boards or said gypsum materials; (v) allowing said gypsum boards or said gypsum materials to dry; or (f) producing potassium sulfate and calcium chloride from said gypsum slurry by (i) adding sylvite or sylvinite to said gypsum slurry to produce intermediate liquor stream; (ii) adding said amine solvent or said amine solvent with modifier to said intermediate liquor stream to form precipitates comprising said potassium sulfate; (iii) removing said precipitates from said intermediate liquor stream by filter; (iv) removing at least most of said amine solvent or said amine solvent with modifier by stripper; (v) recycling said intermediate liquor stream comprising at least dissolved calcium chloride to said intermediate concentrate; or (vi) recovering said intermediate liquor stream comprising at least calcium chloride brine. 2. The method of claim 1 wherein said saline water is seawater, brine streams from seawater desalination plants, sulfate-rich natural brine, flue gas desulphurization water, or a combination thereof. 3. The method of claim 1 wherein said calcium chloride rich formation water is aquifers water, oil-fields produced water, coal-bed produced water, methane-bed produced water or a combination thereof. 4. The method of claim 1 wherein said nozzle is coaxial nozzle, spray nozzle, vibrating nozzle, premixed nozzle, or a combination thereof. 5. The method of claim 1 wherein said amine solvent is selected from the group consisting of isopropylamine, propylamine, dipropylamine, diisopropylamine, ethylamine, diethylamine, methylamine, dimethylamine, or a combination thereof. 6. The method of claim 1 wherein said modifier is nitrogen, nitrous oxide, or a combination thereof. 7. The method of claim 1 wherein said filter is hydrocyclone, microfiltration, ultrafiltration, vacuum filter, press filter, centrifugal filter, electrostatic filter, or a combination thereof. 8. The method of claim 1 wherein said stripper is flash tank, distillation column, vacuum distillation, vacuum membrane distillation, pervaporation, or a combination thereof. 9. The method of claim 1 wherein said conventional seawater desalinations plants and auxiliary equipments are multi-stage flash, multi-effect distillation, vapor-compression, multi-effect submerged-tube evaporators, reverse osmosis, boilers, heat recovery steam generators, steam turbines, cooling towers, or a combination thereof. 10. The method of claim 1 wherein said membrane distillation is vacuum membrane distillation, direct contact membrane distillation, membrane osmotic distillation, or a combination thereof. 11. A method for separating sulfate and brucite from saline water to produce nearly sulfate-brucite free saline stream and inorganic materials, said method comprising the steps of (a) removing sulfate from said saline water by (i) mixing calcium chloride rich formation water with said saline water to allow the concentration of the calcium ion to exceed the concentration of the sulfate ion in said saline water to produce intermediate concentrate; (ii) pressurizing said intermediate concentrate into a precipitator at pressure between 50 psi and 1,200 psi through at least one nozzle to produce a jet stream of said intermediate concentrate; (iii) pressurizing amine solvent or amine solvent with modifier into said precipitator at pressure between 50 psi and the critical pressure of said amine solvent or said amine solvent with modifier through at least one nozzle to form precipitates comprising gypsum from said intermediate concentrate; (iv) removing said precipitates from said intermediate concentrate by filter to produce gypsum slurry; (v) removing at least most of said amine solvent or said amine solvent with modifier from said intermediate concentrate by stripper to produce said nearly sulfate-free saline stream; (b) removing brucite from said nearly sulfate-free saline stream by (i) pressurizing said nearly sulfate-free saline stream into a second precipitator at pressure between 50 psi and 1,200 psi through at least one nozzle to produce a jet stream of said nearly sulfate-free saline stream; (ii) pressurizing amine solvent or amine solvent with modifier into said second precipitator at pressure between 50 psi and the critical pressure of said amine solvent or said amine solvent with modifier through at least one nozzle to form precipitates comprising said brucite from said nearly sulfate-free saline stream; (iii) removing said precipitates from said nearly sulfate-free saline stream by filter to produce brucite slurry; (iv) removing at least most of said amine solvent or said amine solvent with modifier from said nearly sulfate-free saline stream by stripper to produce said nearly sulfate-brucite free saline stream; (c) injecting said nearly sulfate-brucite free saline stream into subterranean formation for hydrocarbons recovery; or (d) feeding said nearly sulfate-brucite free saline stream into conventional seawater desalinations plants and auxiliary equipments; or (e) producing de-ionized water from said nearly sulfate-brucite free saline stream by membrane distillation; (f) producing gypsum boards or gypsum materials from said gypsum slurry by (i) separating said gypsum slurry into moist solid gypsum and liquor stream by filter; (ii) removing at least most of remaining said amine solvent or said amine solvent with modifier from said liquor stream by stripper; (iii) recycling said liquor stream to said intermediate concentrate; (iv) molding said moist solid gypsum to produce said gypsum boards or said gypsum materials; (v) allowing said gypsum boards or said gypsum materials to dry; or (g) producing potassium sulfate and calcium chloride from said gypsum slurry by (i) adding sylvite or sylvinite to said gypsum slurry to produce intermediate liquor stream; (ii) adding said amine solvent or said amine solvent with modifier to said intermediate liquor stream to form precipitates comprising said potassium sulfate; (iii) removing said precipitates from said intermediate liquor stream by filter; (iv) removing at least most of said amine solvent or said amine solvent with modifier by stripper; (v) recycling said intermediate liquor stream comprising at least dissolved calcium chloride to said intermediate concentrate; or (vi) recovering said intermediate liquor stream comprising at least calcium chloride brine. 12. The method of claim 11 wherein said saline water is seawater, brine streams from seawater desalination plants, sulfate-rich natural brine, flue gas desulphurization water, or a combination thereof. 13. The method of claim 11 wherein said calcium chloride rich formation water is aquifers water, oil-fields produced water, coal-bed produced water, methane-bed produced water or a combination thereof. 14. The method of claim 11 wherein said nozzle is coaxial nozzle, spray nozzle, vibrating nozzle, premixed nozzle, or a combination thereof. 15. The method of claim 11 wherein said amine solvent is selected from the group consisting of isopropylamine, propylamine, dipropylamine, diisopropylamine, ethylamine, diethylamine, methylamine, dimethylamine, or a combination thereof. 16. The method of claim 11 wherein said modifier is nitrogen, nitrous oxide, or a combination thereof. 17. The method of claim 11 wherein said filter is hydrocyclone, microfiltration, ultrafiltration, vacuum filter, press filter, centrifugal filter, electrostatic filter, or a combination thereof. 18. The method of claim 11 wherein said stripper is flash tank, distillation column, vacuum distillation, vacuum membrane distillation, pervaporation, or a combination thereof. 19. The method of claim 11 wherein said conventional seawater desalinations plants and auxiliary equipments are multi-stage flash, multi-effect distillation, vapor-compression, multi-effect submerged-tube evaporators, reverse osmosis, boilers, heat recovery steam generators, steam turbines, cooling towers, or a combination thereof. 20. The method of claim 11 wherein said membrane distillation is vacuum membrane distillation, direct contact membrane distillation, membrane osmotic distillation, or a combination thereof. 21. A method for separating sulfate from saline water to produce nearly sulfate-free saline stream and inorganic materials, said method comprising the steps of: (a) separating calcium chloride rich produced water from wet oil by hydrophobic membranes; (b) removing sulfate from said saline water by (i) mixing said calcium chloride rich produced water with said saline water to allow the concentration of the calcium ion to exceed the concentration of the sulfate ion in said saline water to produce intermediate concentrate; (ii) pressurizing said intermediate concentrate into a precipitator at pressure between 50 psi and 1,200 psi through at least one nozzle to produce a jet stream of said intermediate concentrate; (iii) pressurizing amine solvent or amine solvent with modifier into said precipitator at pressure between 50 psi and the critical pressure of said amine solvent or said amine solvent with modifier through at least one nozzle to form precipitates comprising gypsum from said intermediate concentrate; (iv) removing said precipitates from said intermediate concentrate by filter to produce gypsum slurry; (v) removing at least most of said amine solvent or said amine solvent with modifier from said intermediate concentrate by stripper to produce said nearly sulfate-free saline stream; (c) injecting said nearly sulfate-free saline stream into subterranean formation for hydrocarbons recovery; or (d) feeding said nearly sulfate-free saline stream into conventional seawater desalinations plants and auxiliary equipments; or (e) producing de-ionized water from said nearly sulfate-free saline stream by membrane distillation; (f) producing gypsum boards or gypsum materials from said gypsum slurry by (i) separating said gypsum slurry into moist solid gypsum and liquor stream by filter; (ii) removing at least most of remaining said amine solvent or said amine solvent with modifier from said liquor stream by stripper; (iii) recycling said liquor stream to said intermediate concentrate; (iv) molding said moist solid gypsum to produce said gypsum boards or said gypsum materials; (v) allowing said gypsum boards or said gypsum materials to dry; or (g) producing potassium sulfate and calcium chloride from said gypsum slurry by (i) adding sylvite or sylvinite to said gypsum slurry to produce intermediate liquor stream; (ii) adding said amine solvent or said amine solvent with modifier to said intermediate liquor stream to form precipitates comprising said potassium sulfate; (iii) removing said precipitates from said intermediate liquor stream by filter; (iv) removing at least most of said amine solvent or said amine solvent with modifier by stripper; (v) recycling said intermediate liquor stream comprising at least dissolved calcium chloride to said intermediate concentrate; or (vi) recovering said intermediate liquor stream comprising at least calcium chloride brine. 22. The method of claim 21 wherein said saline water is seawater, brine streams from seawater desalination plants, sulfate-rich natural brine, flue gas desulphurization water, or a combination thereof. 23. The method of claim 21 wherein said nozzle is coaxial nozzle, spray nozzle, vibrating nozzle, premixed nozzle, or a combination thereof. 24. The method of claim 21 wherein said amine solvent is selected from the group consisting of isopropylamine, propylamine, dipropylamine, diisopropylamine, ethylamine, diethylamine, methylamine, dimethylamine, or a combination thereof. 25. The method of claim 21 wherein said modifier is nitrogen, nitrous oxide, or a combination thereof. 26. The method of claim 21 wherein said filter is hydrocyclone, microfiltration, ultrafiltration, vacuum filter, press filter, centrifugal filter, electrostatic filter, or a combination thereof. 27. The method of claim 21 wherein said stripper is flash tank, distillation column, vacuum distillation, vacuum membrane distillation, pervaporation, or a combination thereof. 28. The method of claim 21 wherein said conventional seawater desalinations plants and auxiliary equipments are multi-stage flash, multi-effect distillation, vapor-compression, multi-effect submerged-tube evaporators, reverse osmosis, boilers, heat recovery steam generators, steam turbines, cooling towers, or a combination thereof. 29. The method of claim 21 wherein said membrane distillation is vacuum membrane distillation, direct contact membrane distillation, membrane osmotic distillation, or a combination thereof. 30. A method for separating sulfate and brucite from saline water to produce nearly sulfate-brucite free saline stream and inorganic materials, said method comprising the steps of: (a) separating calcium chloride rich produced water from wet oil by hydrophobic membranes; (b) removing sulfate from said saline water by (i) mixing calcium chloride rich produced water with said saline water to allow the concentration of the calcium ion to exceed the concentration of the sulfate ion in said saline water to produce intermediate concentrate; (ii) pressurizing said intermediate concentrate into a precipitator at pressure between 50 psi and 1,200 psi through at least one nozzle to produce a jet stream of said intermediate concentrate; (iii) pressurizing amine solvent or amine solvent with modifier into said precipitator at pressure between 50 psi and the critical pressure of said amine solvent or said amine solvent with modifier through at least one nozzle to form precipitates comprising gypsum from said intermediate concentrate; (iv) removing said precipitates from said intermediate concentrate by filter to produce gypsum slurry; (v) removing at least most of said amine solvent or said amine solvent with modifier from said intermediate concentrate by stripper to produce said nearly sulfate-free saline stream; (c) removing brucite from said nearly sulfate-free saline stream by (i) pressurizing said nearly sulfate-free saline stream into a second precipitator at pressure between 50 psi and 1,200 psi through at least one nozzle to produce a jet stream of said nearly sulfate-free saline stream; (ii) pressurizing amine solvent or amine solvent with modifier into said second precipitator at pressure between 50 psi and the critical pressure of said amine solvent or said amine solvent with modifier through at least one nozzle to form precipitates comprising said brucite from said nearly sulfate-free saline stream; (iii) removing said precipitates from said nearly sulfate-free saline stream by filter to produce brucite slurry; (iv) removing at least most of said amine solvent or said amine solvent with modifier from said nearly sulfate-free saline stream by stripper to produce said nearly sulfate-brucite free saline stream; (d) injecting said nearly sulfate-brucite free saline stream into subterranean formation for hydrocarbons recovery; or (e) feeding said nearly sulfate-brucite free saline stream into conventional seawater desalinations plants and auxiliary equipments; or (f) producing de-ionized water from said nearly sulfate-brucite free saline stream by membrane distillation; (g) producing gypsum boards or gypsum materials from said gypsum slurry by (i) separating said gypsum slurry into moist solid gypsum and liquor stream by filter; (ii) removing at least most of remaining said amine solvent or said amine solvent with modifier from said liquor stream by stripper; (iii) recycling said liquor stream to said intermediate concentrate; (iv) molding said moist solid gypsum to produce said gypsum boards or said gypsum materials; (v) allowing said gypsum boards or said gypsum materials to dry; or (h) producing potassium sulfate and calcium chloride from said gypsum slurry by (i) adding sylvite or sylvinite to said gypsum slurry to produce intermediate liquor stream; (ii) adding said amine solvent or said amine solvent with modifier to said intermediate liquor stream to form precipitates comprising said potassium sulfate; (iii) removing said precipitates from said intermediate liquor stream by filter; (iv) removing at least most of said amine solvent or said amine solvent with modifier by stripper; (v) recycling said intermediate liquor stream comprising at least dissolved calcium chloride to said intermediate concentrate; or (vi) recovering said intermediate liquor stream comprising at least calcium chloride brine. 31. The method of claim 30 wherein said saline water is seawater, brine streams from seawater desalination plants, sulfate-rich natural brine, flue gas desulphurization water, or a combination thereof. 32. The method of claim 30 wherein said nozzle is coaxial nozzle, spray nozzle, vibrating nozzle, premixed nozzle, or a combination thereof. 33. The method of claim 30 wherein said amine solvent is selected from the group consisting of isopropylamine, propylamine, dipropylamine, diisopropylamine, ethylamine, diethylamine, methylamine, dimethylamine, or a combination thereof. 34. The method of claim 30 wherein said modifier is nitrogen, nitrous oxide, or a combination thereof. 35. The method of claim 30 wherein said filter is hydrocyclone, microfiltration, ultrafiltration, vacuum filter, press filter, centrifugal filter, electrostatic filter, or a combination thereof. 36. The method of claim 30 wherein said stripper is flash tank, distillation column, vacuum distillation, vacuum membrane distillation, pervaporation, or a combination thereof. 37. The method of claim 30 wherein said conventional seawater desalinations plants and auxiliary equipments are multi-stage flash, multi-effect distillation, vapor-compression, multi-effect submerged-tube evaporators, reverse osmosis, boilers, heat recovery steam generators, steam turbines, cooling towers, or a combination thereof. 38. The method of claim 30 wherein said membrane distillation is vacuum membrane distillation, direct contact membrane distillation, membrane osmotic distillation, or a combination thereof.
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