This method synthesizes low-cost, high-performance iron phosphate that can be used for producing lithium-ion battery cathodes. It has three main steps: (S1) the synthesis of a iron (II,III) phosphate solution by mixing waste iron oxide (FeO, Fe.sub.2O.sub.3), low purity iron powder, and sulfuric acid in an aqueous solvent, followed by the addition of phosphoric acid; (S2) the addition of hydrogen peroxide to the previous solution, followed by pH balancing chemicals to yield crude iron phosphate; and (S3) the stirring of the previous solution to precipitate iron (III) phosphate, followed by an aging step, a filtering step, a washing step, and a drying step to obtain iron phosphate, which may be in the form of a hydrate. This straightforward approach uses waste iron oxide to minimize costs, while still yielding a fairly pure iron phosphate with excellent capacity, cycling stability, and broad physical and chemical properties suitable for battery production.

A preparation method of a lithium iron phosphate cathode material includes steps of (a) providing a phosphoric acid, an iron powder, a carbon source, wherein the phosphoric acid and the iron powder are reacted to produce a first product, and the first product is amorphous iron phosphate with chemical formula of a-FePO.sub.4.Math.xH.sub.2O (x>0); (b) providing a lithium salt mixture, wherein the lithium salt mixture includes a lithium hydroxide and a lithium carbonate; (c) grinding and mixing the first product, the carbon source, and the lithium salt mixture; (d) calcining the first product and the lithium salt mixture to produce a precursor, wherein the precursor has a formula of Fe.sub.3(PO.sub.4).sub.2.Math.8H.sub.2O+Li.sub.3PO.sub.4; and (e) calcining the precursor and the carbon source to obtain the lithium iron phosphate cathode material.

A source of phosphate for agriculture and food industry comprises a phosphate salt in solid form of formula M.sub.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.

The present invention relates to a process for the production of a phosphate containing fertilizer product, comprising the steps of providing a phosphate containing precipitate from a wastewater treatment process; separating water from the precipitate to provide a dewatered slurry cake; and optionally admixing a compound selected from nitrogen, potassium and additional phosphorous containing compounds. The present invention further relates to a fertilizer and uses.

The present disclosure is directed to a method of manufacture of zeolite. A sol-gel formulation includes a water-soluble fraction of ODSO as an additional component. The resulting products include zeolite with increased crystallinity relative to comparable sol-gel formulations without ODSO as a precursor. In additional embodiments, the rate of crystallization of the zeolite is greater relative to comparable sol-gel formulations without ODSO.

The present invention concerns a process for producing a high purity phosphorus product from wastewater, by carrying to the process phosphate-containing wastewater that has been treated to remove biomass and other impurities, not including dissolved phosphates, creating floes using one or more iron, aluminium, magnesium or calcium salts, adding an alkali metal or alkaline earth metal hydroxide or oxide to the flocs in an amount effective to react the iron, aluminium, magnesium or calcium salt into the corresponding hydroxide, separating the hydroxide from the formed phosphate, and obtaining the high purity phosphorus product in a form of a liquid or solid phosphate salt.

A manufacturing method of a carbon-coated lithium iron phosphate material is disclosed. The manufacturing method includes steps of: (a) providing a first slurry, a carbon source and a lithium source, wherein the first slurry is formed from an iron source and a phosphorus source; (b) mixing the first slurry, the carbon source and the lithium source to form a second slurry, and grinding the second slurry in a tank at a first temperature to form a third slurry, wherein the first temperature is ranged from 25? C. to 40? C.; and (c) drying and sintering the third slurry to form the carbon-coated lithium iron phosphate material including a core layer and a coating layer coated on the core layer, wherein the core layer is formed from the lithium source, the iron source and the phosphorus source, and the coating layer is formed from the carbon source.

A process for separating heavy metals from phosphoric starting material comprises the following steps: (i) heating the starting material to a temperature of 600 to 1.200 C. in a first reactor (1) and withdrawing combustion gas; (ii) using the combustion gas of step (i) to preheat an alkaline source; and (iii) transferring the heated starting material of step (i) and the heated alkaline source of step (ii) to a second reactor (20), adding an elemental carbon source, heating to a temperature of 700 to 1.100 C. and withdrawing process gas and a product stream.

This disclosure describes methods, processes and devices that remove or release organics from ores, such as phosphate ores or secondary sources such as mine tailings or waste. The method comprises: preparing an ore to a pre-set size; mixing the ore with a reagent having an initial pH value in a slurry comprising the ore and the reagent; and while mixing the slurry, maintaining a pH level in the slurry to a pH range. While mixing the slurry, the slurry may produce a supernatant containing organic material removed from the ore and sediment containing refined ore. The method may also screen the slurry to create a first stream of materials that does not pass through the screen and a second stream of materials and refined ore that pass through the screen.

The invention relates to a method and system for phosphate recovering from a waste stream, such as an animal manure waste stream. The method comprises the steps of: providing a tank reactor; 5 providing acidogenic bacteria and/or acetogenic bacteria and the waste stream to the tank reactor, hydrolysing the waste stream, forming a reaction mixture; providing a gas flow to the reaction mixture for removing carbon dioxide from the reaction mixture; 10 providing the reaction mixture to an anaerobic sludge reactor, removing a compound comprising phosphate from the reaction mixture within the anaerobic sludge reactor, and removing gas from the reaction mixture within the anaerobic sludge reactor.