40results about How to "Fast separation rate" patented technology

The invention relates to a method of taking mulberry leaves as the raw materials to continuously extract the active ingredients of alkaloids, flavonoids and polysaccharides. The invention includes the following steps: the solvents of 20 percent to 90 percent ethanol or 10 percent to 90 percent acetone are selected for reflux extraction to obtain the filtrate and filter residue; the filtrate is concentrated and dissolved by adding water, the flavonoid compounds with the content of 30 percent to 50 percent are obtained by macroporous resin separation; the solution is treated by ion exchange resin separation to get the alkaloid compounds with the content of 40 percent to 60 percent after passes through the macroporous resin; the filter residue of the mulberry leaves is boiled and decolored by using the water, and the acid polysaccharide compounds with the content of 55 percent to 85 percent are obtained by 10 percent to 60 percent alcohol sedimentation. The invention continuously and efficiently separates three active ingredients of alkaloids, flavonoids and polysaccharides of the mulberry leaves by one-time feeding, all the steps are not disturbed mutually, the extraction rate is high, the process operation is simple, the cost is low, and the invention is conductive to industrial popularization and application.

The invention relates to a method for enriching vitamin K2 in natto bacillus fermentation liquid. The method comprises the following steps of step 1, performing centrifugation on the natto bacillus fermentation liquid, and collecting supernatant; step 2, adding a flocculant and a filter aid to the supernatant obtained in the step 1, then performing stirring, performing centrifugation, and collecting supernatant; step 3, adding Fe3O4@SiO2-G nanometer microspheres which are reduced to the supernatant obtained in the step 2, regulating the pH to 6.0-8.0, then performing stirring treatment under the condition of 20-35 DEG C for 10-30min, and then collecting magnetic materials after adsorption; and step 4, adding hexane to the magnetic materials after adsorption, performing ultrasonic parsing for 5-20min, then externally applying a magnet, collecting magnetic nanometer materials, pouring out organic phase, and performing filtering, wherein filtrate is a hexane solution rich in vitamin K2. According to the method for enriching vitamin K2 in natto bacillus fermentation liquid, the VK2 in the natto bacillus fermentation liquid can be quickly and efficiently enriched. The method has the advantages that the specific steps are simple, the materials are low in price, and can be reused, and the enrichment effect is efficient.

The invention discloses a rod-like CuxO photocatalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) putting anhydrous cupric sulfate, hexadecyl trimethyl ammonium bromide and water into a flask, and uniformly stirring so as to obtain a mixed liquid; (2) putting an egg membrane into the flask, and performing uniform stirring so as to obtain a turbid liquid; (3) transferring the turbid liquid into an egg shell, putting the egg shell into a flask with a sodium hydroxide solution, and performing an oil bath reaction; (4) centrifuging the obtained solution, collecting a product, and performing washing and drying so as to obtain a sample; and (5) calcining the sample, so as to obtain a copper-based photocatalytic material for visible photocatalytic sterilization. The egg shell is adopted as a reactor to prepare the rod-like CuxO photocatalytic material under a gentle condition, because of the rod-like structure, the material has a large specific surface area, meanwhile, more surface active sites can be exposed, and the visible photocatalytic antibacterial activity of the material can be effectively improved.

The embodiment of the invention discloses a preparation method of a TiO2/gC3N4 composite photocatalyst, and belongs to the field of chemistry. The preparation method comprises the following steps: dispersing graphite-phase carbon nitride and titanium dioxide in a solvent according to a mass ratio of (1-7):(9-3), and conducting heating to volatilize the solvent at 50-100 DEG C until a dry powdery mixture is obtained; and annealing the mixture for 1-3 hours at the heating speed of 1-8 DEG C/min under the condition of 200-550 DEG C to obtain the titanium dioxide/graphite phase carbon nitride composite photocatalyst. The catalyst can effectively promote rapid separation of photon-generated carriers on a junction interface, so that the photocatalytic activity of the catalyst is improved.

The invention belongs to the field of nano materials, and discloses a preparation method of a carbon material loaded tubular carbon nitride photocatalyst. The photocatalyst with large specific surface area, multiple active sites, high photon-generated carrier separation and migration rate, low photon-generated carrier coincidence rate, visible light absorption red shift, high photocatalytic activity and high stability is obtained by adjusting the mass fraction of the carbon material. The preparation method comprises the following steps: S1, uniformly mixing the carbon material with sodium chloride, potassium chloride, lithium chloride and melamine, and calcining in a corundum crucible; in the step S1, the preparation method of the carbon material comprises the following steps: (1) cutting the white part of the shaddock peel into blocks, drying, soaking in a KOH solution, and freeze-drying; (2) calcining a sample in a tubular furnace, and washing the sample with HNO3 and ultrapure water until the sample is neutral to obtain a carbon material; and S2, washing the product with ultrapure water and ethanol, drying and collecting. The photocatalyst obtained by the invention promotes the improvement of the hydrogen production performance by photolysis of water, and provides a new thought for further development of efficient photocatalysts.

The invention discloses a precipitate flotation separation system of rubidium and cesium in an aqueous solution and application thereof. The precipitate flotation separation system comprises a precipitant, a collecting agent and a foaming agent, wherein the precipitant at least comprises phosphomolybdate, and the collecting agent and the foaming agent at least include a cationic surfactant. The invention also discloses a flotation separation method of rubidium and cesium ions in the aqueous solution. The flotation separation method comprises the steps of adding the precipitant, the collectingagent and the foaming agent into the aqueous solution containing the cesium ions for a reaction to precipitate the cesium ions, wherein the precipitant at least comprises phosphomolybdate, and the collecting agent and the foaming agent at least comprise the cationic surfactant. Precipitated solids obtained by the reaction are collected through flotation separation treatment. The precipitate flotation system taking phosphomolybdate as the precipitant is provided through the combination of precipitation and flotation processes, can be used for separating and extracting rubidium and cesium resources or removing rubidium and cesium ions in radioactive waste liquid, and can solve the problems of dissolution loss of loaded ammonium phosphomolybdate adsorbents, complex material preparation and the like in a use process.

The invention discloses a separation process of petroleum associated gas and belongs to the technical field of separation of associated gas. The separation process includes the steps of pretreatment,gas-liquid separation, CO2 separation, and gas recycling. The CO2 separation step employs a composite membrane to separate carbon dioxide; the composite membrane is of three-layer structure includinga polysulfone membrane layer as a surface layer, a gel filter layer as an intermediate layer, and a nonwoven layer as a bottom layer. The separation process of petroleum associated gas disclosed herein is suitable for separating carbon dioxide and methane. The composite membrane for the membrane separation step has high porosity and selectivity, as well as high permeation flux and deformation resistance; the separation process disclosed herein has good separation effect, employs compact equipment and is environmentally friendly.

The invention relates to the technical field of photocatalytic materials, in particular to a preparation method of a 2D/1D heterojunction photocatalyst and an application of the 2D/1D heterojunction photocatalyst in antibiosis, and the preparation method of the 2D/1D heterojunction photocatalyst comprises the following steps: synthesizing a 1D porous In2O3 nanotube as a support semiconductor by a simple calcination method; and performing in-situ growth of a 2D ultrathin ZnIn2S4 nanosheet on the surface of the 1D porous In2O3 nanotube through a low-temperature oil bath process so as to construct the efficient visible light driven 2D ZnIn2S4/1D In2O3 heterojunction photocatalyst which is used for inactivating pathogenic microorganisms. The method has the advantages that the method is simple and convenient, the cost is low, and the material prepared by the method has the advantages of accelerating the separation and migration rate of photon-generated carriers and the generation of active species such as superoxide radicals, and has excellent photocatalytic antibacterial activity.

The invention discloses an ultrasonic leaching-extracting separating method of enriched rare earth ore, which is characterized by the following: leaching enriched yttrium rare earth ore, leached liquid and extract in the same container; extracting group by group; separating; obtaining yttrium hydrochlorate or enriched sulfate material as residual phase and non-yttrium rare earth element hydrochlorate or enriched sulfate material as extracting phase.

The invention belongs to the technical field of demulsifiers, and particularly relates to a composite demulsifier and a preparation process thereof. The composite demulsifier disclosed by the invention is prepared from the following components in percentage by weight: a nano-silicon dioxide modified polyether demulsifying agent, a toluene diisocyanate modified polyether demulsifying agent, trimethylolpropane polyoxypropylene polyoxyethylene ether, ionic liquid, sulfonated polyacrylamide, diethylene glycol monobutyl ether and water, wherein the ionic liquid is a mixture of 1-butyl-3-methylimidazole hexafluorophosphate and bromo-1-octyl-3-methylimidazole. According to the composite demulsifier, three demulsifying agents including the nano-silica modified polyether demulsifying agent, the toluene diisocyanate modified polyether demulsifying agent and the trimethylolpropane polyoxypropylene polyoxyethylene ether are used as main demulsifying agents, the ionic liquid is used for reducing the strength of an interfacial film, a flocculating agent is used for changing oil droplets from a dispersed state into a coalescent state, and the demulsifying agents enable the demulsifying agents in a coalescent state to form a complete oil phase, so oil-water separation is realized.

The invention relates to a separating device of hydrochloric acid and polymerized oil in production of pinacolone. The separating device is characterized by comprising a separating kettle, a hydrochloric acid recycling kettle and a polymerized oil recycling kettle; the hydrochloric acid recycling kettle and the polymerized oil recycling kettle are arranged at the two sides of the separating kettlerespectively. According to the fact that the densities of polymerized oil and hydrochloric acid are different and the density of hydrochloric acid is larger than that of the polymerized oil, mixed hydrochloric acid and polymerized oil stand in the separating kettle to be layered, by arranging a separator at a liquid inlet of the separating kettle, hydrochloric acid and the polymerized oil are quickly separated preliminarily, and hydrochloric acid and the polymerized oil separated from the separator enter the separating kettle to stand and be separated for the second time; through preliminaryseparation by the adoption of the separator and secondary separation through standing and layering, the separating effect of hydrochloric acid and the polymerized oil is better, and the separating speed is higher.