51 results about "Iron pyrophosphate" patented technology

The invention relates to the field of production devices of industrial-grade phosphoric acid, in particular to an electric calcination furnace adopted in the process for producing industrial-grade phosphoric acid by using low-grade phosphate rock. A specific application method of the electric calcination furnace adopted in the process of preparing the industrial-grade phosphoric acid comprises the steps as follows: firstly, the temperature inside the furnace is set to be 100 DEG C, then a rotating tube is started and preheated for one hour, the temperature inside the furnace is heated to 250 DEG C, and the rotating tube is preheated for half an hour again; and materials are uniformly fed, solid materials are directly rolled into a hydrolyzing barrel, gaseous materials enter a fluorine recycling barrel from six gas collecting pipes at the top, pyrophosphoric acid and iron-aluminum oxides are solidified after the materials are calcinated, the spilt gas is hydrogen fluoride, and the temperature is controlled to be 100 DEG C during discharging. The electric calcination furnace is adopted for preparing the industrial-grade phosphoric acid and is low in energy consumption, simple in process, easy to operate, low in cost and capable of effectively saving energy.

The invention discloses a method for synthesizing carbon-coated lithium ferrous pyrophosphate by a hydrothermal method. The method comprises the following steps of (1) weighing raw materials, dissolving a carbon source into distilled water or deionized water, and heating, stirring and dissolving in a water bath at the temperature of 50-90 DEG C; respectively dissolving a lithium source, an iron source and a phosphorus source into the deionized water, uniformly stirring the sources, sequentially adding the iron source and the lithium source into a solution dissolved with the carbon source, adding ammonia water to adjust the pH of the mixed solution to 4-6, adding the phosphorus source, heating the mixed solution in the water bath at the temperature of 50-90 DEG C, and stirring for 1-2 hours; (2) performing reaction on the mixed solution at 150-350 DEG C and the pressure of 1-10MPa for 3-10 hours, cooling to room temperature after the reaction is finished, and performing solid-liquid separation to obtain a solid which is a precursor solid-phase product; (3) drying the precursor solid-phase product, and then sintering to obtain the carbon-coated lithium ferrous pyrophosphate. The method has the advantage that the reaction temperature is relatively low, and the synthesis method is simple; the prepared carbon-coated lithium ferrous pyrophosphate serving as a positive electrode material is excellent in electrochemical performance.

The invention relates to an LFP (lithium iron phosphate) positive electrode material with excellent low-temperature property. The LFP positive electrode material comprises LFP particles, and lithium iron pyrophosphate covering the LFP particles. The preparation method comprises the steps of fully mixing a Li-source compound, a Fe-source compound, a P-source compound and a compound containing doped metal M in a dispersing agent according to the molar ratio of X:1:1:Y, grinding and drying to obtain a dry material A, wherein X is not less than 1.02 and not greater than 1.10, and Y is not less than 0 and not greater than 0.05; heating the material A to obtain a sintered material B; adding B, the Li-source compound, the Fe-source compound and the P-source compound into the dispersing agent, grinding, and drying to obtain a dry material C; and heating the material C to obtain the LFP particles coated with lithium iron pyrophosphate. Furthermore, a carbon layer can be generated to improve the electron conductivity. The LFP positive electrode material provided by the invention is effectively improved in the low-temperature property and the rate capability.

The invention provides a nutritional sliced dried meat containing trace elements of calcium, iron and zinc, and a processing method thereof. The sliced dried meat contains 80-85 parts by weight of a main material rabbit meat, auxiliary materials comprising 5-8 parts by weight of sugar and 1-2 parts by weight of salt, and trace elements comprising, by weight, 0.3 parts of calcium citrate, 0.01 parts of zinc lactate, 0.02 parts of ferric sodium pyrophosphate, 0.01 parts of magnesium sulfate and 0.01 parts of edible selenium. The reinforced addition of essential nutritional elements for human bodies into the sliced dried meat enhances the nutritional values of the sliced dried meat and eliminates the problems of malnutrition caused by the deficiency of the trace elements in the human bodies, and the like.

The invention provides for methods of treating iron deficiency and methods of reducing or eliminating the dose of erythropoiesis stimulating agent for increasing or maintaining hemoglobin levels in the target range in a subject suffering from anemia comprising administering soluble ferric pyrophosphate in an amount effective to maintain or increase Hgb levels in the subject.

The invention discloses a method for producing suspended ferric pyrophosphate, and relates to the technical field of ferric pyrophosphate production. The method is to emulsify and modify ordinary ferric pyrophosphate through microencapsulation technology, and specifically includes the following steps: (1) Pulverized ordinary ferric pyrophosphate or undried ordinary ferric pyrophosphate wet material is mixed with sodium alginate, glycerol monostearate and enzymatic soybean lecithin to make a suspension above 80°C, which is subjected to high-speed shearing and homogenization Emulsifying to obtain a mixed emulsion; (2) spray drying the emulsion, the air inlet temperature is 160-190°C, the air outlet temperature is 80-95°C, and the spray-dried powder is sieved to obtain the target product. The present invention emulsifies and modifies ordinary ferric pyrophosphate through the microencapsulation method of emulsifying and homogeneous spraying, so that ferric pyrophosphate is used to strengthen the iron element of beverages without precipitation, and at the same time it is convenient for storage and transportation, so it is used in the production of beverages and foods In the process, the processing performance is greatly improved.

The invention discloses a method for preparing ferric phosphate and ferric pyrophosphate by using an ore leaching tail liquid as an iron source. The method comprises the following steps: 1) while stirring, spraying a 5-10 wt% phosphate or pyrophosphate solution into the ore leaching tail liquid until the pH value is equal to 3.5-4.5 and a precipitate is formed; 2) standing for 0.5-2 hours, and spraying a 0.1-0.3% organic flocculant solution into the suspension, wherein the flocculant solution accounts for 0.5-5 wt% of the ore leaching tail liquid; and 3) standing for 4-12 hours to precipitate the suspension, dewatering the precipitate by vacuum filtration or pressure filtration, eluting with cold water, and baking the solid phase at 80-90 DEG C to obtain the ferric phosphate or ferric pyrophosphate. On the premise of implementing harmless treatment on the ore leaching tail liquid, the method recovers the dissolved-state iron in the ore leaching tail liquid, and the obtained ferric phosphate or ferric pyrophosphate is a raw material for preparing lithium ion batteries.