39results about How to "Efficient and selective separation" patented technology

In an embodiment, the present invention relates to an apparatus and a process for producing a concentrated form of basic zinc sulphate from a, typically dilute, acidic zinc sulphate-bearing solution. The process embodiment comprises the steps of precipitating the zinc, preferably primarily as basic zinc sulphate, from the acidic zinc sulphate solution, preferably using calcium oxide, in such a way as to promote the formation of separate gypsum crystals and basic zinc sulphate particles, and upgrading the zinc content in the precipitates by separating the basic zinc sulphate from the gypsum using size separation techniques.

The invention relates to the field of polymer materials, in particular to a preparation method of graphene composite foam for oil-water separation. The preparation method comprises the steps that reduction and crosslinking are conducted on oxidized graphene by dopamine, a hydrothermal method is used to make the oxidized graphene form a three-dimensional structure in self-assembly mode, chitosan / graphene composite foam is prepared by soaking and freeze-drying with a chitosan solution, and finally the chitosan / graphene composite foam is fluoridized to prepare the fluoridized graphene composite foam. The obtained chitosan / graphene composite foam has super amphipathicity in the air and underwater super lipophobicity, after the fluoridation, the chitosan / graphene composite foam has super hydrophobicity, and chitosan and raphene have the advantages of good flexibility, high selective separation efficiency and long cycle service life; the foam can exist stably in a corrosive medium; water takes use of gravity to go through the chitosan / graphene composite foam and does not need to be driven by external force; non-toxic biological materials such as the dopamine and the chitosan are used, the foam is green and environmentally friendly, an anti-bacteria effect of the chitosan serves as a function of purifying a water body during the oil-water separation.

Nanoparticles as described herein are configured to bind to bacterial contaminants, such as Gram positive bacteria, Gram negative bacteria, and endotoxins. The nanoparticles include a core comprising a magnetic material; and a plurality of ligands attached to the core. The ligands include, for example, bis(dipicolylamine) (“DPA”) coordinated with a metal ion, e.g., Zn2+ or Cu2+, to form, e.g., bis-Zn-DPA or bis-Cu-DPA, which can bind to the bacterial contaminants. The nanoparticles can be included in compositions for use in methods and systems to separate bacterial contaminants from liquids, such as liquids, such as blood, e.g., whole or diluted blood, buffer solutions, albumin solutions, beverages for human and / or animal consumption, e.g., drinking water, liquid medications for humans and / or animals, or other liquids.

The invention belongs to the fields of membrane surface engineering and bioseparation engineering and aims at providing a method for preparing a low-density lipoprotein affinity adsorption hemodialysis membrane material. The method provided by the invention comprises the following steps: prewashing the hemodialysis membrane material; placing the prewashed hemodialysis membrane material into a plasma processor cavity; introducing inert gas and activated gas until atmosphere ingredients are constant and then carrying out plasma processing; immersing into a heparin solution; adding a coupling agent to carry out an oscillation reaction; carrying out oscillation washing by utilizing a PBS (Phosphate Buffer Solution); and repeatedly washing with clean water and perform filter drying to obtain the low-density lipoprotein affinity adsorption hemodialysis membrane material. In the method provided by the invention, active reaction groups are introduced into by utilizing a constant-pressure and low-temperature plasma activation modification processing method; the reaction is only carried out on the surface of the material, the body performance of the material is not influenced, and simultaneously the method has the characteristics of high efficiency, low cost, low energy consumption, environmental friendliness and the like; the hydrophilia and blood compatibility of the surface of a macromolecule separation membrane material can be greatly improved; and the blockage effect caused by membrane pollution in the hemodialysis course can be effectively reduced.

The invention discloses a method for separating antimony in a hydrochloric acid-chlorine salt solution, comprising: adding an oxidizing agent to the hydrochloric acid-chlorine salt solution, controlling the reaction conditions, oxidizing trivalent antimony in the solution to pentavalent antimony, and making the pentavalent antimony Antimony is precipitated to precipitate pentavalent antimony oxides, thereby obtaining pentavalent antimony oxide precipitation slurry; aging the pentavalent antimony oxide precipitation slurry to allow the pentavalent antimony oxide crystals to grow, and then solidifying Liquid separation, so as to obtain the pentavalent antimony oxide solid and the solution after antimony removal, that is, to realize the separation of antimony. The invention not only can efficiently and selectively separate antimony and has a high recovery rate of antimony, but also has simple technological process and easy operation.

The invention relates to a method for separating polysaccharide and protein by using a choline ionic liquid two-phase aqueous system, belongs to the technical field of bioactive substance separation and purification, and particularly relates to application of the ionic liquid two-phase aqueous system composed of choline chloride [Ch]Cl and inorganic phosphate K3PO4 in selective separation of fungal polysaccharide and protein. The method is mainly characterized by comprising the following steps: after degreasing crushed fungi mycelium or sporocarp with petroleum ether, using hot water with the temperature of 95 DEG C for reflux extraction for 8 hours, centrifuging, concentrating, dialyzing, and freeze-drying, so as to obtain a fungus aqueous extract; carrying out extraction separation by using the ionic liquid two-phase aqueous system composed of choline chloride[Ch]C1 and inorganic phosphate K3P04; carrying out lower-layer inorganic salt phase dialysis, ethanol precipitation and freeze-drying so as to obtain fungal polysaccharide; carrying out extraction on an upper-layer ionic liquid phase by using dichloromethane, concentrating and recycling an ionic liquid. The ionic liquid two-phase aqueous system provided by the invention is suitable for industrial production of active polysaccharides, has the effects of being green, quick and efficient, the ionic liquid can be recycled for use, the production cost is lowered, and the ionic liquid two-phase aqueous system can be commonly used for the selective separation of various fungal polysaccharide and protein.

The invention discloses a method and a reagent for increasing the yield of selectively dispersed semiconducting carbon nanotubes. The method comprises: uniformly mixing the single-wall carbon nanotube sample, the first polymer and the second polymer in a solvent to form a liquid phase mixing system, and fully dispersing the single-wall carbon nanotube sample in the liquid phase mixing system, Afterwards, the liquid-phase mixed system is centrifuged to separate the supernatant to realize the selective separation of semiconducting single-walled carbon nanotubes; both the first polymer and the second polymer can specifically bind to semiconducting single-walled carbon nanotubes, And the binding speed of the first polymer and the semiconducting single-walled carbon nanotube is greater than the binding speed of the second polymer and the semiconducting single-walled carbon nanotube, and the binding strength is lower than that of the second polymer and the semiconducting single-walled carbon nanotube Bond strength. The invention can realize selective separation of semiconducting single-wall carbon nanotubes with high yield, high purity and high dispersibility, reduces cost, and improves separation repeatability and stability.

The invention discloses a method for selective flotation separation of molybdenum-rhenate in alkaline leaching solution. The method is to adjust the pH value of the alkaline leaching solution containing molybdate and rhenate to 7.1-12, and then add triethylenetetramine , Tetraethylenepentamine, methyl violet 10B and cocamidopropyl betaine are organic modified activated carbon collectors and surfactants, inflated flotation, the foam product is a rhenium-rich component, and the remaining liquid is a molybdenum-rich solution . The method has good selective separation effect on molybdenum and rhenium, simple process flow and low cost, and is especially suitable for separating rhenium and molybdenum in alkaline leaching solutions with low rhenium content and high molybdenum content.

The invention discloses a method for separating a genistein monomer from a daidzein monomer. The method comprises a preparation process of a gold nanotubule membrane, a modification process of the gold nanotubule membrane, a preparation process of an aluminum chelate and a membrane separation process. The method helps realize high-efficiency selective separation of the genistein monomer and the daidzein monomer by utilizing mechanism that the gold nanotubule membrane is modified with p-aminothiophenol so that the membrane is positively charged at a lower pH value, and plays electrostatic repulsion on positively charged genistein and aluminum chelate without repulsion on daidzein which can not form a chelate with the aluminum. The method has the advantages of simple operation, low energy consumption and high efficiency of separation, no pollution, high purity of the monomers separated, industrialized implementation and the like. The method is of great theoretical significance for further research on pharmacological action, mechanism, popularization and application of genistein and daidzein.