3 results about "Iron sulphate" patented technology

This invention discloses a method for preparing battery-grade iron phosphate using iron-phosphorus titanium removal slag. The method includes: first, mixing the iron-phosphorus titanium removal slag with a titanium complex depolymerization aid, and then pretreating it to obtain an aid pretreatment slurry; next, drying the slurry and reacting it at 300-500℃ to obtain a first-stage high-temperature reaction product; then mixing it with an oxidant and reacting it at 800-900℃ to obtain a second-stage high-temperature reaction product; finally, obtaining the final product after acid leaching, aging, and drying. The battery-grade anhydrous iron phosphate prepared using this method has a specific surface area greater than 10 m². 2 The titanium residue is ≤50 ppm and the sulfur residue is ≤0.05%, and the relevant impurity indicators are better than industry requirements, which helps to reduce the charge transfer resistance of ferric phosphate. In addition, the method of this invention can be adapted to various ferric phosphate systems such as ferrous sulfate, ferrous chloride, and lithium-ion ferric phosphate slag acid solution, and has a wide range of application value.

This invention relates to the field of biomedical technology, and in particular to a method for preparing and applying a nanomedicine for treating deep endometriosis. The method involves mixing ferrous ammonium sulfate, trisodium citrate, and polyethyleneimine, then adding thioacetamide and triethanolamine via a solvothermal reaction to obtain two-dimensional iron sulfide nanosheets. Dopamine hydrochloride is then added and stirred at room temperature in anhydrous ethanol to obtain polydopamine-coated iron sulfide (FP). FP is then mixed with larotrectinib and anhydrous ethanol to obtain the nanomedicine FPL for treating deep endometriosis. The synthesis method of this invention is simple and highly operable; the product is stable and reproducible; FPL exhibits good biocompatibility and biodegradability. After entering the microenvironment of deep endometriosis lesions, it can responsively release larotrectinib, effectively inhibiting the Trk signaling pathway and significantly reducing the degree of nerve infiltration; simultaneously, the anti-inflammatory effect of the FP carrier alleviates the local inflammatory response, jointly inhibiting lesion progression.

A method for producing lithium iron phosphate from waste lithium iron phosphate material is provided. [Solution] The method includes the steps of: crushing the positive electrode sheet of a waste lithium iron phosphate battery, sieving it to obtain lithium iron phosphate raw material, dissolving it in an acidic solution, and collecting the first filtrate after filtration; adding ferrous sulfate solution to the first filtrate to obtain a mixed solution; adding hydrogen peroxide solution and ammonia aqueous solution to the mixed solution, filtering and washing after the reaction to obtain a second filtrate and a filtration cake; washing and drying the filtration cake to obtain iron hydroxyphosphate; adding barium hydroxide aqueous solution to the second filtrate, allowing it to react completely and then filtering to obtain a third filtrate; adding phosphoric acid solution to the third filtrate to obtain a fourth filtrate; mixing iron hydroxyphosphate, the fourth filtrate and a carbon source, sanding the slurry, drying and obtaining a powder; and sintering and pulverizing the powder in an inert atmosphere to obtain a carbon-coated lithium iron phosphate material.