7 results about "High sodium" patented technology

This invention provides a method and apparatus for lithium recovery from a high-sodium, low-lithium solution via cryogenic sodium precipitation and targeted extraction. The method comprises the following steps: S1, weighing sodium sulfate and lithium sulfate samples, dissolving them in deionized water to prepare a high-sodium, low-lithium solution; S2, determining the lithium and sodium ion content of the high-sodium, low-lithium solution using ICP-MS and atomic absorption spectroscopy; S3, freezing the high-sodium, low-lithium solution prepared in step S1 in a circulating freezer to obtain a solid-liquid mixture. The method and apparatus provided by this invention achieve low lithium carryover during sodium precipitation from a high-sodium, low-lithium solution, further realizing high-efficiency lithium resource recovery. Compared with traditional processes, the lithium carryover rate during sodium precipitation can be reduced to 0.2%, reducing energy consumption and operational difficulty while improving lithium recovery rate, making it suitable for industrial production.

This invention belongs to the field of microbial technology and provides a space-mutated *Bacillus paralichrysiformis* strain with high synthetic selenocysteine ​​and high sodium selenite tolerance, obtained through space mutagenesis, and its applications. The *Bacillus paralichrysiformis* G1-m strain is deposited at the China General Microbiological Culture Collection Center (CGMCC) with accession number CGMCC No. 36525, deposited on November 11, 2025. This strain has significant core advantages: firstly, it possesses extremely high sodium selenite tolerance, able to withstand sodium selenite stress up to 440 mM; secondly, its selenocysteine ​​and nano-selenium synthesis efficiency is significantly improved, not only significantly increasing the strain's resistance threshold to selenium stress but also directionally enhancing the activity of the selenocysteine ​​biosynthetic pathway. Its application potential covers multiple fields, such as selenium-enriched probiotic preparations, nano-drug carriers, functional food additives, and high-efficiency selenium nutritional supplements, laying the foundation for the high-value utilization of selenium resources and the industrial application of functional microorganisms.

The application provides a device for recycling mixed waste salt of sodium chloride and sodium sulfate, which comprises a mixed waste salt organic matter removal system, a low-chloride salt treatment system and a high-chloride salt treatment system connected to the discharge end of the mixed waste salt organic matter removal system respectively; the low-chloride salt treatment system comprises a low-chloride salt impurity removal system, a low-chloride salt evaporation crystallization system connected to the low-chloride salt solution outlet of the low-chloride salt impurity removal system, and a sodium sulfate refining system connected to the sodium sulfate crystal outlet of the low-chloride salt evaporation crystallization system. The application divides the mixed waste salt into low-chloride salt with high sodium sulfate content and high-chloride salt with low sodium sulfate content. The sodium sulfate refining system in the low-chloride salt treatment system can utilize the dissolution-crystallization balance principle and the physical entrainment balance principle of the sodium sulfate-sodium chloride-water ternary system to obtain high-quality sodium sulfate products, thereby simplifying the process, reducing the cost, improving the recovery rate of sodium sulfate, and obtaining relatively high-purity sodium sulfate products.

This invention discloses a lyophilized formulation of fosfomycin sodium for injection and its preparation method. The lyophilized formulation comprises fosfomycin sodium, L-histidine, trehalose dihydrate, glycine, and disodium edetate, wherein L-histidine serves as a buffer component, trehalose dihydrate serves as an amorphous matrix protectant, glycine serves as a crystalline framework agent, and disodium edetate serves as a metal ion chelating agent. The preparation method includes solution preparation, pH adjustment and fine filtration, pre-freezing and annealing, primary drying, secondary drying, and nitrogen sealing. This invention, through the synergistic combination of quaternary excipients, specifically solves multiple technical problems in the fosfomycin sodium system, such as epoxy hydrolysis degradation, difficulties in lyophilization due to high sodium content, and extreme hygroscopicity. The resulting lyophilized formulation exhibits intact appearance, rapid reconstitution, and good stability.

The invention provides a method for extracting and separating lithium from a solution with a high sodium-lithium ratio, and relates to the field of hydrometallurgy. The method for extracting and separating the lithium from the solution with the high sodium-lithium ratio comprises the following steps: mixing a water phase containing lithium and sodium with an organic phase, extracting, standing and splitting phases to obtain a lithium-loaded organic phase and raffinate; wherein the organic phase comprises an extraction agent, a synergistic extraction agent and a diluent, the extraction agent comprises PMBP, the synergistic extraction agent comprises TRPO, the diluent comprises at least one of sulfonated kerosene and light white oil, and the mass ratio of sodium to lithium in the lithium-containing sodium water phase is greater than or equal to 80; mixing the lithium-loaded organic phase with a washing solution, and washing to remove co-extracted sodium; and mixing the washed organic phase with the strip liquor, carrying out reverse extraction, and carrying out standing and phase splitting to obtain a lithium-rich strip liquor and a regenerated organic phase. The method provided by the invention can realize efficient separation of lithium and sodium from the solution with high sodium-to-lithium ratio, and has the advantages of high lithium extraction rate, low sodium co-extraction rate, rapid phase separation and complete reverse extraction.

The invention discloses a preparation method of ultralow-sodium flake alumina, relates to the technical field of inorganic non-metallic material preparation, and solves the problems of high roasting temperature and high sodium content in the flake alumina preparation process, aluminum hydroxide is used as an aluminum source, is mixed with a composite molten salt system, is roasted at 720-860 DEG C, and is mixed with a sodium removal agent for wet grinding to obtain the ultralow-sodium flake alumina. And centrifugally washing and drying to obtain the ultralow-sodium flake alumina. By utilizing the synergistic effect of the composite fluoride salt, the roasting temperature of the flaky alumina prepared by the molten salt method is reduced, the roasting temperature is lower than the temperature of the traditional molten salt method, meanwhile, the sodium content in the flaky alumina is preliminarily reduced, and the sodium content in the flaky alumina is finally reduced by combining the sodium removal agent wet grinding and centrifugal washing twice sodium removal and multi-effect synergism. The sodium content of the finished product is less than 0.05 wt.%.

The application relates to a ni-doped sodium fluorophosphate and a preparation method and application thereof. According to the atomic molar ratio of each element in a chemical general formula, a sodium source, an iron source, a ni source, a phosphorus source and a fluorine source are weighed to obtain raw materials; the raw materials are ball milled to obtain mixed slurry and dried mixed powder after vacuum drying to remove the ball milling solvent; the dried mixed powder is pressed into a sheet and placed in a crucible, pre-sintering is carried out under inert gas protection, the precursor powder is obtained after being ground after being cooled to room temperature; a carbon source and a ball milling solvent are ball milled with the precursor powder, vacuum drying and tablet pressing are sequentially carried out to obtain a tablet; high-temperature sintering is carried out on the tablet under inert gas protection, the tablet is cooled to room temperature in the furnace after high-temperature sintering, and the ni-doped sodium fluorophosphate is obtained after being ground and crushed. The ni-doped sodium fluorophosphate has good positive electrode material electronic conductivity, high sodium ion diffusion coefficient, good cycle stability and good rate performance.