Compositions and methods for the removal of phosphates and other contaminants from aqueous solutions
AssigneeNClear Inc.
InventorsSteven A. Odom, Denny J. Ivey
Life of this patent
Estimating the term…
Abstract
Compositions and methods for removing phosphates, nitrates and heavy metals from aqueous solutions.
Claims27
A method of producing a composition capable of removing phosphates, nitrates and heavy metals from a solution, comprising:
- (a) forming a slurry comprising calcium oxide, silicon dioxide, an alkali and a solvent, wherein the molar ratio of the calcium oxide:the silicon dioxide:the alkali ranges from 2.43-2.97:1.12-1.38:0.9-1.1;
- and
- (b) producing the composition capable of removing phosphates, nitrates and heavy metals from a solution by subjecting the slurry to a hydrothermal process for about 1 to about 6 hours under about 13.5 to 16.5 psi of pressure.
The method of claims 2-7, wherein the heating step of claim (c) is performed at about 600° C. for at least 30 minutes.
A method of producing a composition capable of removing phosphates, nitrates and heavy metals from a solution, comprising:
- (a) forming a slurry comprising calcium oxide, silicon dioxide, an alkali, a solvent and a metal halide salt, wherein the molar ratio of the calcium oxide:the silicon dioxide:the alkali:the metal halide salt ranges from 48.6-59.4:22.5-27.5:18-22:4.95-6.05;
- and
- (b) producing the composition capable of removing phosphates, nitrates and heavy metals from a solution by subjecting the slurry to a hydrothermal process for about 1 to about 6 hours under about 13.5 to 16.5 psi of pressure.
A composition characterized by the EDS spectrum shown in FIG. 8.
A composition characterized by the XRD spectrum shown in FIG. 9.
A composition comprising calcium silicate, calcium hydroxide, sodium chloride, silicon dioxide and calcium carbonate crystal structures characterized by an X-ray diffraction pattern expressed in terms of Bragg angle 2Θ, interplanar spacing, and relative intensity values:
- Bragg angle 2Θ
- d
- Relative intensity
- 18.1063
- 4.89532
- 28.67409
- 19.8817
- 4.46199
- 4.547442
- 20.8849
- 4.24989
- 10.05302
- 23.1636
- 3.8367
- 4.609025
- 26.6747
- 3.33912
- 63.91426
- 27.4448
- 3.24714
- 8.931069
- 28.7186
- 3.10595
- 9.66074
- 29.3996
- 3.03554
- 46.35756
- 31.6566
- 2.82407
- 100
- 34.2154
- 2.6185
- 36.79283
- 36.037
- 2.49021
- 2.083547
- 39.4625
- 2.28158
- 15.03306
- 41.2618
- 2.18615
- 8.137185
- 43.3281
- 2.08656
- 2.265682
- 45.4881
- 1.99237
- 56.2733
- 47.2604
- 1.92171
- 14.82384
- 47.4848
- 1.91314
- 11.70157
- 48.6166
- 1.87122
- 5.406887
- 50.137
- 1.81798
- 9.067216
- 50.8006
- 1.79578
- 13.45406
- 54.3658
- 1.68613
- 6.826049
- 56.523
- 1.62679
- 16.33507
- 59.9928
- 1.54073
- 6.003494
- 62.7463
- 1.47958
- 1.05093
- 64.2216
- 1.4491
- 2.82968
- 66.2656
- 1.40927
- 6.570272
- 68.2524
- 1.37301
- 4.79262
- 75.3313
- 1.26058
- 13.07787
- 81.4414
- 1.18074
- 1.714596
- 84.0006
- 1.15116
- 9.304232
- 84.7205
- 1.14321
- 3.51105
- 107.4102
- 0.95571
- 0.94311
- 110.036
- 0.94013
- 4.214059
Dependencies are inferred from the claim text.