Methods treat ash from waste incineration, wherein the methods at least comprise: a) the digestion of the ash by a leaching liquor containing phosphate ions in solution such as to form a first solid phase comprising impurities and a first liquid phase comprising phosphate ions; and b) the separation of said first liquid phase comprising phosphate ions from said first solid phase. Step a) is carried out for a duration of less than one hour or at a temperature of more than 40° C.
F23J 1/00 - Removing ash, clinker, or slag from combustion chambers
B01D 15/36 - Selective adsorption, e.g. chromatography characterised by the separation mechanism involving ionic interaction, e.g. ion-exchange, ion-pair, ion-suppression or ion-exclusion
C05B 17/00 - Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
C05B 11/10 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using orthophosphoric acid
B09B 5/00 - Operations not covered by a single other subclass or by a single other group in this subclass
C05F 1/00 - Fertilisers made from animal corpses, or parts thereof
C05F 3/00 - Fertilisers from human or animal excrements, e.g. manure
C05F 7/00 - Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
n(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.
C05B 11/12 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using aqueous hydrochloric acid
C05B 1/04 - Double-superphosphateTriple-superphosphateOther fertilisers based essentially on monocalcium phosphate
C05B 7/00 - Fertilisers based essentially on alkali or ammonium orthophosphates
The present invention relates to a method for treating ash from waste incineration, comprising: a) the digestion of the ash by a leaching liquor containing phosphate ions in solution such as to form a first solid phase comprising impurities and a first liquid phase comprising phosphate ions; and b) the separation of said first liquid phase comprising phosphate ions from said first solid phase. Step a) is carried out for a duration of less than one hour or at a temperature of more than 40 °C.
F23J 1/00 - Removing ash, clinker, or slag from combustion chambers
B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
C05F 7/00 - Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
C05F 9/00 - Fertilisers from household or town refuse
C05B 9/00 - Fertilisers based essentially on phosphates or double phosphates of magnesium
C05B 11/10 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using orthophosphoric acid
The invention concerns a phosphate salt in solid form of formula Mn(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; said phosphate salt has a phosphate content expressed as a P2O5 content of between 30 and 50% by weight of the phosphate salt, characterised in that it has a cadmium content lower than 0.40 ppm.
C01B 25/22 - Preparation by reacting phosphate containing material with an acid, e.g. wet process
C05B 11/08 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using sulfuric acid
C05B 11/10 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using orthophosphoric acid
C05B 11/12 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using aqueous hydrochloric acid
The invention concerns a phosphate salt in solid form of formula Mn(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; said phosphate salt has a phosphate content expressed as a P2O5 content of between 30 and 50% by weight of the phosphate salt, characterised in that it has a cadmium content lower than 0.40 ppm.
C01B 25/22 - Preparation by reacting phosphate containing material with an acid, e.g. wet process
C05B 11/08 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using sulfuric acid
C05B 11/10 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using orthophosphoric acid
C05B 11/12 - Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes using mineral acid using aqueous hydrochloric acid
The invention relates to a process for the production of high purity phosphoric acid which has a very low content in antimony, and is suitable for food, pharmaceutical, or electronic industry.
C01B 25/22 - Preparation by reacting phosphate containing material with an acid, e.g. wet process
C01B 25/222 - Preparation by reacting phosphate containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
The invention relates to a process for the production of high purity phosphoric acid which has a very low content in antimony, and is suitable for food, pharmaceutical, or electronic industry.
patents
