13-10-2016 дата публикации
Номер: US20160297719A1
Принадлежит:
ECOPHOS S.A.
A source of phosphate for agriculture and food industry comprises a phosphate salt in solid form of formula M(HPO4)y.zH2O in which M is Na, K, NH4, n=2, and y=1; or M is Ca, n=1, y=1; or M is Al or Fe, n=2, y=3; and in which z is 0, 1 or 2, wherein said phosphate salt has a phosphate content expressed as a P2O5 content of between 30 and 50% by weight of the phosphate salt, and it has a cadmium content lower than 0.40 ppm. 150-. (canceled)51. A phosphate salt in solid form of formula M(HPO)y.zHO in which M is Na , K , NH , n=2 , and y=1; or M is Ca , n=1 , y=1; or M is Al or Fe , n=2 , y=3; and in which z is 0 , 1 or 2; said phosphate salt has a phosphate content expressed as a P205 content of between 30 and 50% by weight of the phosphate salt , wherein the cadmium content in said phosphate salt is less than 0.40 ppm.52. The phosphate salt according to claim 51 , wherein:{'sup': '226', 'the Racontent is less than 100 Bq/kg,'}the magnesium content is less than or equal to 20 ppm,{'sup': 234', '235', '238, 'the uranium content in said phosphate salt is less than 1500 Bq/kg, the uranium content being determined by the respective contents of U, Uand U,'}{'sup': '210', 'the Pbcontent in said phosphate salt is less than 1500 Bq/kg, and/or'}{'sup': '210', 'the content of polonium Poin said phosphate salt is less than 300 Bq/kg.'}53. The phosphate salt according to claim 51 , wherein the phosphate salt is a calcium phosphate salt preferably having a calcium content of between 15 and 30% by weight.54. The phosphate salt according to claim 51 , wherein:in the form of solid particle aggregates having a diameter of between 500 μm and 5 mm; orin the form of solid particle aggregates having a diameter less than 500 μm.55. The phosphate salt according to claim 51 , wherein said phosphate salt has one or more of the following contents of metallic impurities: the strontium content is less than 280 ppm or the nickel content is less than 3 ppm or the thallium content is less than 5 ppm ...
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