Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1983-08-25
1984-07-17
Doll, John
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
210638, 210681, 423308, 423356, C01B 2526
Patent
active
044605552
ABSTRACT:
A process for making particulate substantially water-insoluble magnesium phosphate product and method of use of the product for removing ammonia from aqueous solutions. The particulate magnesium phosphate product acts as a remarkably effective scavenger wherein under equilibrium conditions only about six (6) grams of the product are required to bind the ammonia (more exactly, ammonium ions) liberated from one (1) gram of the urea, a result far superior to traditional zirconium phosphate (ZP) prior art materials which under ideal conditions require about 17 to 20 grams of ZP per gram of urea. The particulate magnesium phosphate product can also be used for the removal of ammonium ions either produced by enzymatic or non-enzymatic hydrolysis of urea or proteins or amino acids or available as NH.sub.4.sup.+ from its native source. The magnesium phosphate product is made by forming a slurry of water and magnesium hydroxide in the presence of a phosphate ion-containing buffer having a pH of about 6.5 to about 8.5 and reacting the slurry with H.sub.3 PO.sub.4.
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Carter David M.
Doll John
Langel Wayne A.
Organon Teknika Corporation
Wendel Charles A.
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