4results about How to "Simple separation process" patented technology

The application belongs to the field of molecular imprinting polymer separation materials, and provides an amino acid-based molecular imprinting polymer / quantum composite material, a preparation method and application thereof, and comprises the following steps: mixing an inorganic quantum dot material dispersion liquid, two kinds of amino acid template molecules, 3-aminopropyl triethoxysilane, tetraethyl orthosilicate and a stabilizer, then adding ammonia water and deionized water, uniformly dispersing, and reacting at room temperature to obtain a polymerization product; and after elution and post-treatment of the polymerization product, the template molecules are removed to obtain the amino acid-based molecular imprinting polymer / quantum composite material. The composite material can be applied to the separation and identification of various amino acids, and all have high separation and identification performance, so that one material can effectively separate and identify various target molecules, and the concentration of the amino acid molecules can be quantitatively analyzed.

This invention discloses an environmentally friendly method for selectively leaching heavy rare earth elements (HREEs) from weathered crust leached rare earth ores, belonging to the fields of biometallurgy and rare earth hydrometallurgy. The method includes the following steps: activating microbial strains to obtain an activated bacterial solution; dissolving organic nitrogen and carbon sources in water to obtain a culture medium, and inoculating the activated bacterial solution to obtain a post-inoculated culture medium; adding sterilized weathered crust leached rare earth ore to the post-inoculated culture medium and conducting leaching experiments to obtain a leachate rich in HREEs; the concentration of organic nitrogen source in the culture medium is 1-2 g / L, and the concentration of carbon source is 2-10 g / L. This invention achieves a synergistic effect of selective leaching of HREEs and clean, low-ammonia nitrogen emissions through precise control of carbon and nitrogen source concentrations in the culture system, demonstrating significant industrial application value.

The application discloses lavender exosomes as well as a preparation method and application thereof. The lavender exosomes are separated from stable and controllable cultured lavender suspension cells, have the advantages of stable and controllable environment, greatly shortened growth cycle, simple separation process, and environment-friendly and non-polluted process; multiple extraction steps are optimized; the concentration of the extracted lavender suspension cell exosomes is as high as 5.50*10 10 -1.65*10 11 particles / mL, and the particle size is stable, and the average particle size is 120-150 nm. The prepared lavender suspension cell exosomes have good broad-spectrum antibacterial effect and high safety, and it is indicated that the lavender suspension cell exosomes have good application prospect in the fields of food, cosmetics, antibacterial preservation and the like.

The application provides a method for separating and purifying medical Pb-212 from natural Th-232 and daughter nuclides thereof, and belongs to the field of medical isotope preparation. The method comprises the following steps: obtaining a Th-232 acid solution; providing a first chromatographic column, performing one-dimensional lead enrichment on the Th-232 acid solution, and obtaining a Pb-212 crude liquid; providing a second chromatographic column, performing two-dimensional refining separation on the Pb-212 crude liquid, and obtaining a Pb-212 purified liquid; providing a third chromatographic column, performing three-dimensional concentration and salt conversion on the Pb-212 purified liquid, and obtaining high-purity and high-concentration Pb-212; the first chromatographic column is filled with coated resin as a stationary phase, and the coated resin is a polymer microsphere coated with a crown ether compound; the second chromatographic column is filled with a cation exchange material as a stationary phase; and the third chromatographic column is filled with a three-dimensional cation exchange resin or coated resin as a stationary phase. The application discloses a method for separating Pb-212 from natural Th-232 and daughter nuclides thereof, and ensures high purity and recovery rate of the Pb-212, thereby meeting the demand of medical radioactive drug application.