16results about How to "Simple separation process" patented technology

The invention relates to the field of dihydric alcohol production, in particular to a catalyst suitable for high-yield production of 1, 5-pentanediol, a preparation method of the catalyst and a production method of 1, 5-pentanediol. Under the catalytic action of a nickel-based catalyst with a composite carrier, tetrahydrofurfuryl alcohol is subjected to one-step hydrogenation ring opening to generate 1, 5-pentanediol. According to the method, tetrahydrofurfuryl alcohol is adopted as a raw material and is converted into 1, 5-pentanediol on a hydrogenation-ring-opening bifunctional catalyst in a hydrogenation manner, and byproducts such as 1, 2-pentanediol, 2-methyltetrahydrofuran and n-pentanol are obtained. The composition of the hydrogenation-ring opening bifunctional catalyst is NiO-CoO / La2O3-ZrO2, the hydrogenation component is CuO-CoO and a composite oxide carrier La2O3-ZrO2, and the pressure conditions of the hydro-conversion process are as follows: the H2 pressure is 3.0-4.0 MPa, and the temperature is 165-195 DEG C. The invention also discloses a preparation method of the hydrogenation-ring opening bifunctional catalyst.

The invention relates to a method for separating magnesium and manganese in laterite-nickel ore hydrometallurgy, which comprises the following steps of: firstly, adding a neutralizing agent into laterite-nickel ore pickle liquor to react so as to remove iron and aluminum impurities contained in the laterite-nickel ore pickle liquor to obtain iron and aluminum removed liquor; then, adding a neutralizer into the iron and aluminum removed liquid to perform nickel-cobalt-manganese precipitation treatment so as to obtain nickel-cobalt-manganese hydroxide and nickel-cobalt-manganese precipitated liquid; and finally, introducing carbon dioxide into the nickel-cobalt-manganese settled solution to carry out air floatation-gravity settling treatment to obtain an upper emulsion and a lower emulsion, and then carrying out solid-liquid separation to respectively obtain magnesium carbonate and manganese carbonate. The separation method provided by the invention can effectively remove iron and aluminum slag, separate and recover manganese and magnesium elements in the nickel, cobalt and manganese precipitated liquid, and improve the utilization rate of resources.

The present invention relates to a method and apparatus for continuously preparing alcohol by hydroformylation reaction, including: (A) a cobalt-phosphine complex catalyst solution and an olefin are passed into a hydroformylation reactor, and a hydroformylation reaction is carried out under a synthesis gas environment; (B) the crude reaction product is separated, and a mixed product of alcohol, aldehyde and alkane is obtained in the light component, and a material containing a cobalt-phosphine complex catalyst is obtained in the heavy component; (C) most of the material containing the cobalt-phosphine catalyst is returned to the entrance of the pre-reactor for recycling; a small part enters a post-processing reactor and is post-processed under a synthesis gas atmosphere; (D) the effluent material of the post-processing reactor is distilled and separated, and products such as alcohol are obtained at the top of the tower, and the residual material at the bottom of the tower is discharged from the reactor. The inventive method post-processes the externally thrown material containing heavy objects, greatly reduces the amount of externally thrown materials, reduces waste liquid discharge, is beneficial to environmental protection, and has industrial prospects.

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.

The invention discloses chenopodium quinoa concentrated protein powder rich in arginine and a preparation method of the chenopodium quinoa concentrated protein powder. The content of protein (dry basis) in the chenopodium quinoa concentrated protein powder is larger than or equal to 75%, and the content of the arginine is larger than or equal to 7.0 g per 100 g protein. Chenopodium quinoa willd is subjected to milling processing and flotation separation to obtain chenopodium quinoa willd germs, then water is added for homogenization to obtain chenopodium quinoa willd germ homogenate, cell wall degrading enzyme is added for ultrasonic-assisted enzymolysis and sieving to obtain enzymolysis slurry, and the enzymolysis slurry is subjected to alcohol extraction impurity removal and drying to obtain chenopodium quinoa willd concentrated protein powder; the separation efficiency is improved while the separation process is simplified, the protein is prevented from being degraded and damaged, the protein yield is higher than 95%, and the maximum utilization of quinoa germ protein resources is realized.

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 invention belongs to the technical field of cell reprogramming, and particularly relates to a method for reprogramming hair follicle stem cells into induced pluripotent stem cells. The method for reprogramming the hair follicle stem cells into the induced pluripotent stem cells comprises the following steps: (1) adding a tetrahydrate 1CoMiP plasmid into a cell suspension of the hair follicle stem cells, mixing, and carrying out electrotransformation; (2) inoculating the cells obtained after the electrotransfection treatment in the step (1) into a culture container, and culturing by adopting a first culture medium; (3) sequentially replacing the culture medium with a second culture medium, a third culture medium and a fourth culture medium, and continuously culturing; (4) selecting monoclonal cells, and culturing by adopting a fifth culture medium; and (5) replacing the fifth culture medium with a sixth culture medium to obtain the induced pluripotent stem cells. The induced pluripotent stem cells obtained by reprogramming through the method are identified to meet the requirements of the induced pluripotent stem cells.

The utility model relates to the technical field of air separation, in particular to an air separation device capable of quickly recovering full-load operation, which comprises an upper cooling tower, a main cooler, a lower cooling tower, a crude argon condenser, a crude argon tower, a pure argon condenser, a pure argon tower and a heat exchanger, the main cooler is communicated with a liquid nitrogen pipeline and a liquid oxygen pipeline, and the lower cooling tower is communicated with a compressed air pipeline. A first cooling liquid pipeline is communicated between the lower cooling tower and the heat exchanger, a second cooling liquid pipeline is communicated between the heat exchanger and the crude argon condenser, a third cooling liquid pipeline is communicated between the second cooling liquid pipeline and the pure argon condenser, and a first condensate pipeline is communicated between the crude argon condenser and the upper cooling tower. A first flash steam pipeline is communicated between the crude argon condenser and the upper cooling tower, a first crude argon pipeline is communicated between the upper cooling tower and the crude argon tower, and a first pure argon pipeline is communicated with the bottom of the pure argon tower. The air separation device effectively solves the problems of low production efficiency and high energy consumption of the existing air separation device.

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.

The invention discloses a method for preparing potassium hexatitanate nanowhiskers by using waste salt, which comprises the following steps: (1) mixing the mixed waste salt of a herbicide cyhalofop-butyl synthesis byproduct with titanium dioxide, and grinding on a ball mill to obtain powder, the waste salt comprising potassium carbonate, potassium bicarbonate, potassium bromide, potassium fluoride and organic matter; the ratio of the sum of the mole number of potassium carbonate in the waste salt and the mole number of potassium in the potassium bicarbonate to the mole number of titanium dioxide is 1: (2.50-2.75); (2) heating the powder obtained in the step (1), and sintering to obtain a sintered body; (3) soaking and stirring the sintered body in clear water to obtain a slurry liquid, filtering to obtain a filter cake, and washing with water until the filtrate does not contain fluorine ions and bromine ions; drying is performed to obtain the potassium hexatitanate nano crystal whiskers; the potassium hexatitanate nanowhisker prepared by the method has high additional value and high length-diameter ratio, not only improves the use value of waste salt, but also simplifies the later separation process of potassium bromide and potassium fluoride serving as fluxing agents.

The present invention discloses a method for enriching uranium from a mixed solution of uranium and rare earth. The method comprises adding a mixed sample of rare earth ions and uranium into a specific solvent, wherein uranium is concentrated in the solution in the form of uranyl ions (UO2 2+ ) in the form of uranium; then the solution is added to a column containing an adsorbent for separation by solid phase extraction mode; first, a specific eluent is used to separate the rare earth ions, and then an inorganic acid is used as an eluent to wash the column to obtain uranyl. The present invention uses a simple column chromatography separation technology to separate uranium and rare earth mixtures, and finally achieves uranium enrichment. The technology is simple to operate, can quickly achieve the separation of uranium and rare earth, and has high selectivity, and can finally enrich uranium with a purity of more than 99.9%.

The present invention relates to a preparation method of 2,5-furandicarboxylic acid, comprising the following steps: cesium furoate and cesium dicarboxylate are uniformly mixed and placed in a reactor, a cesium salt catalyst can be selectively added, and then a solid-phase molten salt reaction is performed under nitrogen or inert gas atmosphere, stirring, and pressurization conditions to obtain an intermediate product cesium salt, and then protonation treatment and purification treatment are performed to obtain a final product 2,5-furandicarboxylic acid. The method of the present invention has a high selectivity of raw materials for FDCA of more than 96%, a simple product separation process, a high yield of the target product, and a low production cost.

The invention relates to the technical field of green energy, and particularly discloses a C1 gas green conversion method which comprises the following steps: firstly, water and a modifier are mixed to obtain a raw material solution, and the modifier is selected from one or more of a nano material with dielectric property, a conductive polymer and inorganic salt with oxidation-reduction property; secondly, mixed gas containing the C1 gas and the raw material liquid are input into a micro-droplet generation device, the raw material liquid generates micro-droplets under the action of atomized gas containing the C1 gas, the size of the micro-droplets is smaller than or equal to 10 micrometers, the micro-droplets have a strong electric field, water is induced to be homogenized, and hydrogen free radicals (. H) and hydroxyl free radicals (. OH) are generated; the hydrogen radical (. H) and the hydroxyl radical (. OH) are both reacted with a C1 gas comprising one or more of CH4, CO2, and CO to produce a C1 converted product. According to the method disclosed by the invention, the C1 gas is promoted to be continuously converted with (. H) and (. OH) by virtue of a confinement effect of a micro-droplet gas-liquid interface, and a C1 conversion product is continuously generated, so that the method is low in energy consumption, simple in step, high in equilibrium conversion rate and more in selectivity.

The invention provides a method for wet extraction of potassium rhenate from rhenium-containing alloy waste, which comprises the following steps: (1) pretreating the rhenium-containing alloy waste, mixing the pretreated rhenium-containing alloy waste with a potassium-containing inorganic substance, and reacting in a muffle furnace to obtain a product; and (2) adding water into the product, mixing and stirring, refrigerating in a refrigerator for a period of time, filtering, recrystallizing, and drying to obtain the potassium rhenate. According to the method, the rhenium-containing alloy waste is placed in a muffle furnace to react to generate a rhenium-containing compound, the rhenium-containing compound is separated according to the solubility rule, and the obtained insoluble solid is potassium rhenate; compared with other recovery methods, the method provided by the invention can improve the purity and recovery rate of potassium rhenate.

The invention relates to a method for synthesizing methyl isoamyl ketone by a one-step method. The method comprises the following steps: mixing acetone and isobutyraldehyde, preheating through a fixed bed reactor filled with a catalyst, reacting with hydrogen in a fixed bed, carrying out aldol condensation, dehydration and hydrogenation reactions, cooling and collecting effluent steam, and thus obtaining a solution of a methyl isoamyl ketone product; the catalyst is a composite metal oxide supported palladium catalyst, the general formula is Pd / CexMyOz, M comprises one of Zr, Al, Mg, Ti and Mn, Pd is used as a hydrogenation active component, and CexMyOz is used as a catalyst carrier and provides an acid / alkali active site. The method has the advantages of simple process, convenience in catalyst preparation, high catalytic activity, high methyl isoamyl ketone selectivity and the like, and has a good industrial application prospect.