35results about How to "Low extraction efficiency" patented technology

The invention discloses a method for recovering sulfur, lead, zinc and silver from oxygen-rich direct leaching residues of zinc concentrate or lead and zinc mixed ores by virtue of ultrasonic wave intensification, belonging to the field of comprehensive recycling of non-ferrous metal metallurgy. The method disclosed by the invention comprises the following steps: by using tetrachloroethylene or trichloro ethylene as a solvent, extracting elemental sulfur from the oxygen-rich direct leaching residues of zinc concentrate or lead and zinc mixed ores, which are dried, ground, and sieved by virtue of ultrasonic wave intensification, preserving heat and filtering, after naturally cooling and forcibly cooling the filtrate and filtering to obtain a sulfur product, and returning a regenerated sulfur extraction agent to a sulfur extraction step; and enriching zinc, lead and silver in the residues, wherein the residues can be directly fed to a lead system to recover zinc, lead and silver, or the residues are firstly leached to recover zinc, filter residues are fed to the lead system to recover silver, and zinc-containing filtrate is returned to a direct leaching system. The method disclosed by the invention is simple, energy-saving and high in sulfur recovery rate and product quality. The sulfur extraction process is sealed, so that the method is free from environmental pollution and is particularly suitable for comprehensively utilizing normal pressure/high pressure oxygen-rich direct leaching residues of zinc concentrate or lead and zinc mixed ores.

The invention relates to tributyl phosphate extraction resin for zirconium-hafnium separation and a preparation method thereof. The preparation method is characterized by comprising the following steps: adding a solvent into a reaction kettle, wherein the solvent is a mixture of water and alcohols and the mixed weight ratio of the water and the alcohols is 100:2-100; after the solvent is stirred evenly, adding resin into the solvent, wherein the weight ratio of the solvent to the resin is 100:5-100; after the mixture is stirred evenly, adding tributyl phosphate into the mixture, wherein the weight ratio of the tributyl phosphate to the resin is 15-400:100; and stirring the mixture for 0.5 to 20 hours at the temperature of between 10 and 100 DEG C, and filtering the mixture to obtain the TBP extraction resin. The TBP-resin prepared by the method serving as the extraction resin for filling an extraction chromatographic column can effectively separate zirconium and hafnium, fully exerts the advantages of a liquid-liquid extraction process such as large TBP extracted zirconium capacity and large zirconium-hafnium separation coefficient, and eliminates the problem of emulsification produced by liquid-liquid extraction so as to successfully implement a zirconium-hafnium TBP extraction separation process.

The invention discloses an ultrasonic extraction method and process for processing slag containing elemental sulfur. One or a mixture of more of tetrachloroethylene, trichloro ethylene, methylbenzene and xylene is adopted as a solvent; ultrasonic extraction is carried out on the slag containing elemental sulfur; the ultrasonic frequency is 20-200KHz; and the sound intensity is 2.0-50w/cm<2>. According to the ultrasonic extraction method, low-temperature extraction can be achieved without high temperature, energy consumption can be greatly reduced, and the process is low in cost, simple and feasible in operation, high in extraction efficiency, large in raw material processing amount, low in extracting agent loss and significant in composite economic results.

The object of the present invention is to provide a display panel with high light extraction efficiency. The provided display panel has a plurality of self-luminous elements arranged in a two-dimensional matrix, and the self-luminous elements include: a display body layer, which Comprising a light-emitting element; and a transparent output layer, the layer is located in the emission direction of the above-mentioned display body layer, and has an angle conversion part that converts the propagation direction of the output light output from the above-mentioned light-emitting element to the above-mentioned emission direction; the refraction of the above-mentioned output layer The index is the same as or greater than the refractive index of the above-mentioned light-emitting element.

The invention discloses a method for continuous fractional separation and purification of effective ingredients of star anise, and relates to purification of a natural product of star anise. The invention provides a method for continuous fractional separation and purification of the effective ingredients of the star anise, which can ensure the extraction efficiency of a target product, has low production operating cost, high solvent recovery rate and obviously low energy consumption, and is suitable for large-scale production. The method comprises the following steps of: extracting star aniseoil; extracting star anise oil resin; separating anethole from anisaldehyde; performing microbial conversion on shikimic acid; and extracting and separating the shikimic acid. On the basis of extracting the star anise oil resin and separating the anethole from the anisaldehyde, the shikimic acid is extracted and separated from extraction residue, products with high added value, such as shikimi fruit, the anethole and the anisaldehyde are obtained, and the extraction efficiency of the target product is ensured.

The invention discloses a hydrophobic low-eutectic-point solvent based on lidocaine and a preparation method and extraction application of the solvent, and belongs to the technical field of extraction, separation and enrichment of large cationic compounds. The hydrophobic low-eutectic-point solvent based on lidocaine is characterized in that the hydrophobic low-eutectic-point solvent is synthesized from lidocaine serving as a hydrogen bond acceptor and n-octyl p-hydroxybenzoate serving as a hydrogen bond donor in the molar ratio of 1:(0.25-3). The invention particularly discloses the preparation method of the hydrophobic low-eutectic-point solvent based on lidocaine and application of the solvent in extraction of rhodamine B, methyl violet or/and malachite green in an aqueous solution. When used as an extraction agent, the prepared hydrophobic low-eutectic-point solvent has the advantages of being easy to synthesize, stable in performance, low in toxicity, high in extraction efficiency and the like.

The invention provides a solid-supported ionic liquid and a preparation method thereof. The cations of the solid-supported ionic liquid are trialkyl benzyl ammonium cations as shown by a formula (I), and the anions of the solid-supported ionic liquid are deprotonated dialkyl diglycol amic acid as shown by a formula (II); in the formula (I), R1 and R2 are methyl, and R3 is methyl or ethoxyl; in the formula (II), R4 and R5 are respectively and independently alkyl, and at least one of the R4 and R5 is an alkyl group with at least 6 carbon atoms. According to the solid-supported ionic liquid and the preparation method thereof which are provided by the invention, the rare earth ions are extracted firstly, the impurity removal efficiency of iron and aluminum foreign ions is high, so that the recovery rate of low-concentration rare earth is high, and the utilization rate of rare earth resource is improved.

The invention discloses a continuous movement type food extractor. The continuous movement type food extractor comprises a left extracting tower and a right extracting tower which are vertically arranged, wherein an upper connecting pipe and a lower connecting pipe are arranged between the left extracting tower and the right extracting tower; a left spiral conveyor is arranged in the left extracting tower, a right spiral conveyor is arranged in the right extracting tower, an upper spiral conveyor is arranged in the upper connecting pipe, and a lower spiral conveyor is arranged in the lower connecting pipe; a dreg outlet, a first liquid-in pipe and a second liquid-in pipe are arranged on the side wall of the left extracting tower, a liquid-out pipe is arranged on the side wall of the right extracting tower, a circulating pipe is arranged between the second liquid-in pipe and the liquid-out pipe, an evaporator, a condenser and a liquid pump are arranged on the circulating pipe, the condenser is positioned between the evaporator and the liquid pump, the evaporator is adjacent to the liquid-out pipe, and a feeding pipe is arranged at the top end of the upper connecting pipe. The technical defects of low food extracting efficiency and complicated operation at present are overcome. The continuous movement type food extractor provided by the invention is high in efficiency and simple to operate.

The invention provides a preparation method of lespedeza total flavone. The preparation method comprises the following steps: an extraction step: taking lespedeza powder, and extracting the lespedeza powder by adopting a supercritical fluid extraction method by taking supercritical fluid CO2 as an extracting agent and an organic solvent as an entrainer to obtain a lespedeza extract; and a purification step: purifying the lespedeza extract by adopting an adsorption chromatography, performing elution by using an organic solvent mixed solution as an eluting agent to obtain an eluant, and then removing the eluting agent from the eluant to obtain lespedeza total flavone. According to the method, the supercritical fluid extraction method is adopted to extract the lespedeza powder, so that double effects of extraction and separation can be achieved, and the extraction efficiency is high; and the adsorption chromatography is adopted to separate the obtained extract, so that the impurities in the extract can be effectively removed, flavone active substances in lespedeza can be kept, the separation efficiency is high, and the obtained lespedeza total flavone is high in purity.

The invention discloses a gas boiling stabilization type extraction device. The gas boiling stabilization type extraction device is characterized by comprising a fixed bottom plate, an upper cover plate, a glass framework, a gas inlet device, a gas bottle, a gas pipe, a gas flow control device, a bracket, a positioning stand column, an extraction bottle and a connecting and positioning plug pipe,wherein the glass framework is mounted between the fixed bottom plate and the upper cover plate; the gas inlet device is mounted on a side face of the glass framework; the connecting and positioning plug pipe is mounted on the upper surface of the upper cover plate; the extraction bottle is mounted on the connecting and positioning plug pipe; the positioning stand column is mounted on the upper surface of the fixed bottom plate; the bracket is mounted on the upper surface of the positioning stand column; the positioning stand column and the bracket are located in the glass framework; the gas bottle is mounted between the gas inlet device and the connecting and positioning plug pipe; the gas flow control device is mounted at an outer side of a contact part of the upper cover plate and the glass framework; the gas flow control device is connected with the gas pipe. The gas boiling stabilization type extraction device disclosed by the invention can be used for introducing gas into the extraction bottle, a solution in the extraction bottle has a gas boiling state and the extraction bottle does not need to be shaken; the gas boiling stabilization type extraction device is convenient touse and has a good extraction effect and a rapid speed.

The invention discloses a method for extracting cobalt from tailings. The method includes steps: (1) grinding the tailings into powder with a maximum partial diameter being 1-2mm, adding the ground tailings into an inorganic acid solution to realize leaching, and adding alkali to remove excessive inorganic acid impurities after leaching reaction is finished; (2) subjecting a mixture obtained at the step (1) to solid-liquid separation, and taking out the completely separated liquid which is mixed liquid I for standby application; (3) grinding solid tailing powder obtained by solid-liquid separation at the step (2) into powder with a maximum partial diameter being 0.8-1.6mm, adding the ground tailings into the inorganic acid solution to realize leaching, and adding alkali to remove excessive inorganic acid impurities after leaching reaction is finished; (4) subjecting a mixture obtained at the step (3) to solid-liquid separation, and taking out the completely separated liquid which is mixed liquid II for standby application. The method for extracting the cobalt from the tailings has the advantages that defects of the prior art can be overcome, and the method is reasonable and novel in design.