Abstract: The present invention concerns a method for purifying at least one aqueous solution of phosphoric acid continuously, comprising at least: providing, in at least one vessel, at least one solution AP derived from at least one phosphoric acid obtained by a process for wet-chemical production of phosphoric acid, said solution in said vessel being at a temperature between 65° C. and 98° C., and said solution AP comprising before said step 1: between 50% and 63% by weight of P2O5 and between 0.1% and 0.5% by weight of SO3; adding barium carbonate to said vessel, said barium carbonate having a specific particle size distribution which allows for effective flow of the barium carbonate while allowing it to have good reactivity.

Abstract: A method for manufacturing a ceramic material for thermal energy storage, includes producing a mixture of at least particles of clay and particles of natural and/or synthetic phosphate, and water, the mixture comprising between 0.5% and 40% by weight of phosphate compared to the weight of the mixture with the exception of water, and shaping and firing of the mixture to obtain the ceramic material. A ceramic material for thermal energy storage includes: a matrix of clay and, if appropriate, sand, and particles of a natural and/or synthetic phosphate dispersed in the matrix, the ceramic material comprising between 0.5% and 40% by weight of phosphate compared to the weight of the ceramic material.

Abstract: A process for producing a phosphate containing product from a phosphate source is provided. a reactor is fed with a raw material including phosphate in amounts of at least 5 wt. % P2O5, and calcium in amounts of at least 0.7 wt. % CaO. The raw material is digested with a digestion liquor (L) of an aqueous solution of sulphuric acid (H2SO4) and a mineral acids (HX), in a ratio (H+(SA)/H+(L) of between 2 and 75%, where H+(SA) and H+(L) are the mole content of H+issued from the sulphuric acid and the digestion liquor (L), respectively. The in amounts such that the molar ratio H+(L)/Ca is between 0.8 and 1.95, wherein Ca is the mole content of calcium. The digested suspension is separated into an aqueous phosphate rich solution and a first solid phase.

Abstract: A process and an apparatus for purifying a phosphate containing acidic solution (P1) containing impurities through a nanofiltration station (2) includes a number of nanofiltration membrane units arranged in series. At least one permeate recirculation loop, branching off the retentate side of the first membrane unit (M1) and closing the loop at the entry line (1e) to combine at least one of three permeates with the phosphate containing acidic solution (P1), the three permeate recirculation loops include: a first recovery recirculation loop, a first exit recirculation loop, and a second recovery recirculation loop.

Abstract: A method and device for producing a solution of polyphosphoric acid from a feed solution P0 by the wet method is provided. An enriched phosphoric acid solution optionally mixed with a direct feed solution is pulverised in a flame of a combustion chamber in order to form the polyphosphoric acid solution. The combustion gases from the combustion chamber are placed in contact with the feed solution in a gas-acid contactor in order to increase the temperature and the P2O5 concentration thereof and thus to form an enriched phosphoric acid solution. A portion of the enriched phosphoric acid solution is conveyed with a flow rate of Qp into the combustion chamber in order to be pulverised in the flame. The rest of the enriched phosphoric acid solution is conveyed into a recirculation loop in order to be reinjected into the gas-acid contactor with a flow rate of Q2. The ratio of Qp/(Qp+Q2) is controlled with a predefined value.

Abstract: A method and device for the purification of phosphoric acid contained in a residual solution is provided that includes undesirable volatilizable materials. The residual solution is mixed with a solution of enriched phosphoric acid and is sprayed into a flame of a combustion chamber in order to form a combustion solution P3 of phosphoric acid purified of the undesirable volatilizable materials. The combustion gases resulting from the combustion chamber are contacted with a feed solution in a gas-acid contactor in order to increase the temperature and concentration of P2O5 and thus to form the solution of enriched phosphoric acid. A portion of this solution is conveyed at a flow rate Qp into the combustion chamber. The remainder of the solution is conveyed into a recycle loop in order to be reintroduced into the gas/acid contactor at a flow rate Q2. The ratio of the flow rates, Qp/(Qp+Q2) is controlled at a predefined value.

Abstract: A method and device for producing a solution of polyphosphoric acid from a feed solution P0 by the wet method is provided. An enriched phosphoric acid solution optionally mixed with a direct feed solution is pulverised in a flame of a combustion chamber in order to form the polyphosphoric acid solution. The combustion gases from the combustion chamber are placed in contact with the feed solution in a gas-acid contactor in order to increase the temperature and the P2O5 concentration thereof and thus to form an enriched phosphoric acid solution. A portion of the enriched phosphoric acid solution is conveyed with a flow rate of Qp into the combustion chamber in order to be pulverised in the flame. The rest of the enriched phosphoric acid solution is conveyed into a recirculation loop in order to be reinjected into the gas-acid contactor with a flow rate of Q2. The ratio of Qp/(Qp+Q2) is controlled with a predefined value.

Abstract: A method for manufacturing a ceramic material for thermal energy storage, includes producing a mixture of at least particles of clay and particles of natural and/or synthetic phosphate, and water, the mixture comprising between 0.5% and 40% by weight of phosphate compared to the weight of the mixture with the exception of water, and shaping and firing of the mixture to obtain the ceramic material. A ceramic material for thermal energy storage includes: a matrix of clay and, if appropriate, sand, and particles of a natural and/or synthetic phosphate dispersed in the matrix, the ceramic material comprising between 0.5% and 40% by weight of phosphate compared to the weight of the ceramic material.

Abstract: The present invention relates to an inorganic solid nutritive composition comprising at least one polyphosphate and at least one source of iron as micronutrient, wherein said composition is water-soluble and comprises an iron content of between 0.1% and 5% by weight of iron relative to the total weight of said solid composition.

Abstract: The present invention relates to an inorganic solid nutritive composition comprising at least one polyphosphate and at least one source of iron as micronutrient, wherein said composition is water-soluble and comprises an iron content of between 0.1% and 5% by weight of iron relative to the total weight of said solid composition.

Abstract: This invention pertains to a process for manufacturing an iron-based nutrient composition comprising at least the steps of supplying an iron source and a phosphate source containing at least one polyphosphate, further comprising a mixing step of the iron source with the phosphate source. The iron source and phosphate sources being in their solid phase, the mixing of the two being solid-solid mixing, leading to the obtaining of a water-soluble, iron-based solid nutrient composition.

Abstract: Methods for the deposition of thin films comprising at least preparing a solution containing at least one transition metal oxide powder in a solvent, continuously stirring said solution in order to form a sol, and using said sol in the form of said transition metal oxide film, wherein the powder is subjected to a preliminary preparation step.

Abstract: The present invention relates to an inorganic liquid nutritive composition comprising at least one aqueous phase, a polyphosphate and at least one source of iron as micronutrient, having a Ppoly/Fetotal molar ratio of between 5 and 50.

Abstract: The invention relates to lithium-bearing iron phosphate in the form of micrometric mixed aggregates of nanometric particles, to an electrode and cell resulting therefrom and to the method for manufacturing same, which is characterized by a nanomilling step.

Abstract: The present invention relates to an inorganic solid nutritive composition comprising at least one polyphosphate and at least one source of iron as micronutrient, wherein said composition is water-soluble and comprises an iron content of between 0.1% and 5% by weight of iron relative to the total weight of said solid composition.

Abstract: The present invention relates to an inorganic liquid nutritive composition comprising at least one aqueous phase, a polyphosphate and at least one source of iron as micronutrient, having a Ppoly/Fetotal molar ratio of between 5 and 50.

Abstract: A clear and nutritive microemulsion comprising an aqueous phase in which at least one liposoluble active ingredient is dispersed, a first surfactant included in the group consisting of non-ionic surfactants with a high HLB and non-ionic surfactants with medium HLBs; and a second surfactant, characterized in that said second surfactant is chosen from the group consisting of anionic surfactants which have an HLB ?25.

Abstract: The invention relates to lithium-bearing iron phosphate in the form of micrometric mixed aggregates of nanometric particles, to an electrode and cell resulting therefrom and to the method for manufacturing same, which is characterized by a nanomilling step.