39results about How to "Realize extraction and separation" patented technology

The invention relates to a method for extracting and separating tungsten and molybdenum in a high-phosphorus mixed solution containing tungsten and molybdenum. The method comprises the following steps: adding hydrogen peroxide in the high-phosphorus mixed solution containing tungsten and molybdenum for acidity adjustment and control, and converting phosphotungstic acid and phosphomolybdic acid into peroxy-phosphotungstic acid and peroxy-phosphomolybdic acid; then, taking a mixture of tributyl phosphate (TBP) and methyl phosphate dimethyl heptyl ester (P350) as an extracting agent, extracting the peroxy-phosphomolybdic acid into an organic phase, and leaving the peroxy-phosphotungstic acid in an aqueous phase; from now on, after decomposing the peroxy-phosphotungstic acid in extraction raffinate in the way of heating or ultraviolet irradiation or introduction of sulfur dioxide, extracting tungsten in the solution again with a fresh mixed extracting agent, and finally realizing extraction and separation of tungsten and molybdenum from complex material liquid. The method is small in tungsten co-extraction loss, can effectively solve the extraction and separation problem of tungsten and molybdenum in the high-phosphorus mixed solution containing tungsten and molybdenum, and is easy to realize industrialization.

The invention relates to a method of selectively extracting and separating molybdenum from a high-phosphorus tungsten- and molybdenum-containing mixed solution. In the prior art, according to the process of extraction and separation of tungsten and molybdenum through complexation of hydrogen peroxide, when the content of phosphorus in the solution is higher than 0.005 mol/L, the extraction efficiency of the tungsten and the molybdenum is greatly reduced, so that the conventional process of extraction and separation of the tungsten and the molybdenum through complexation of the hydrogen peroxide cannot be used for directly treating the tungsten- and molybdenum-containing mixed solution being higher than 0.005 mol/L in the content of the phosphorus. According to the invention, by means of adjustment and control of the content of acid in the high-phosprous mixed solution, the tungsten and the molybdenum in the mixed solution can be reacted with the phosphorus completely to form tungstomolybdophosphate acid. By means of addition of a proper amount of the hydrogen peroxide, the phosphor-tungstic heteropoly acid and phospho-molybdic heteropoly acid are depolymerized to generate peroxy phosphotungstic acid and peroxy phospho-molybdic acid. By means of TBP as an extraction agent, the peroxy phospho-molybdic acid is extracted into an organic phase and then the loaded organic phase is subjected to reverse-extraction by an alkaline reverse-extraction agent. The method can treat the high-phosphorus tungsten- and molybdenum-containing mixed solution, is low in co-extraction of tungsten, can reach 70% in molybdenum extraction rate in a single stage, is low in the cost of the employed extraction agent and is easy to industrialize.

The invention discloses an extraction device comprising an emulsifying machine (1) and a phase-splitting apparatus (2). The emulsifying machine (1) is provided with an emulsifying machine inlet (3) and an emulsifying machine outlet (4), the phase-splitting apparatus (2) is provided with a mixed phase inlet (5), a heavy phase outlet (6) and a light phase outlet (7), the emulsifying machine inlet (3) is connected with an extracted object inlet (8) and a solvent inlet (9), and the emulsifying machine outlet (4) is connected with the mixed phase inlet (5) of the phase-splitting apparatus. When multistage extraction devices are combined, the light phase outlet of the phase-splitting apparatus in the extraction device at the current level is connected with the solvent inlet of the extraction device at the next level through a pipeline provided with a pump, and the heavy phase outlet of the phase-splitting apparatus in the extraction device at the next level is connected with the extracted object inlet of the extraction device at the current level through the pipeline provided with the pump. The invention has high extraction efficiency, small size, less occupied area, simple operation and capability of saving apparatus investment and running cost.

The invention discloses a separation method of a highway RAP (Reclaimed Asphalt Pavement) material, and belongs to the technical field of separation of the highway RAP material. The method comprises:firstly, after grinding and drying the highway RAP material, inputting the ground and dried highway RAP material into an extractor; after carrying out extraction processing by a composite solvent, separating out asphalt oil and a sand and gravel material; after evaporating mixed oil formed by the asphalt oil and the composite solvent by a distillation still, pumping the obtained asphalt oil into an asphalt oil tank; condensing evaporated composite solvent gas into liquid for recycling; heating residual materials in the extractor to a temperature of 90 to 130 DEG C, controlling a vacuum degreeto be within a range of 1.5 to 3KPa, and after converting the residual composite solvent in the sand and gravel material into gas for output, outputting the sand and gravel material. In the separationprocess, the highway RAP material is processed by the specific composite solvent and process parameters, an extraction rate of the asphalt oil is 94% or more, and less asphalt is left in the separated sand and gravel material.

The invention relates to a uranium, iron, thorium and rare earth extraction and separation process, wherein a UFe/ThRE-containing solution is subjected to extraction and separation with P350 in a hydrochloric acid system, a reducing substance is added to the obtained U-Fe-supported organic phase, the organic phase is subjected to washing-iron with a nitric acid solution to obtain the pure-U-supported organic phase and the raffinate containing bivalent iron, and the pure-U-supported organic phase is subjected to back extraction with a Na2SO4-containing H2SO4 solution so as to obtain the UO2SO4 solution. According to the present invention, with the introduction of the reducing substance into the process, the difficultly-separated trivalent iron and the hexavalent uranium can be effectively separated; and the whole process achieves the comprehensive utilization of the whole element.

The invention provides a method for extracting lithium from a waste battery positive electrode material recovery dilute solution. The method comprises the following steps of recovering lithium ion precipitation in the dilute solution from a lithium-containing positive electrode material to obtain lithium salt precipitation, preparing the lithium salt precipitate into lithium salt slurry, carryingout ion exchange with strong acid type cation exchange resin, then replacing lithium ions in the resin subjected to ion exchange into a lithium-containing solution, and finally precipitating the lithium ions in the lithium-containing solution to obtain the lithium salt. The method is advantaged in that the phosphoric acid solution obtained by exchanging the lithium phosphate slurry with the resincan be continuously used as a raw material, the exchanged resin is regenerated by strong acid to obtain recyclable regenerated resin and a lithium-rich solution, and a lithium carbonate product with awider application range is further obtained, the solution for preparing the lithium salt can continuously return to the system to continuously extract lithium, therefore, the whole process forms a closed-loop lithium dilute solution treatment system which is pollution-free, low in energy consumption, low in cost and high in lithium recovery rate.

The invention provides a borage deeply processing method and deeply processed products thereof. The method comprises the following steps: A, obtaining borage, and performing dry sample treatment so as to obtain dry samples; B, performing extraction and separation on the dry samples so as to obtain borage aromatic oil and remnants at preset extraction pressure and preset extraction temperature for preset extraction time according to a supercritical carbon dioxide extraction method; C, soaking the remnants or the dry samples in an alcohol solution with a preset concentration, and performing extracting flavone according to a continuous regurgitation extraction method. In the processing technology course, the extraction and the separation of the aromatic oil and flavone active substances are realized, and the utilization efficiency of the borage can be effectively improved; besides, the overground parts of the borage of which the seeds are collected can be used, so that the utilization of resources is facilitated.

The invention discloses a method for enriching scandium from titanium white wastewater. The method comprises the six steps of primary extraction, primary reverse extraction, acid dissolution for impurity removal, secondary extraction, washing for titanium removal and secondary reverse extraction. The method for enriching the scandium from the titanium white wastewater achieves comprehensive scandium recycle, the scandium recovery rate is improved from below 50% to 83% or above, extraction and separation of scandium target element and impurities are achieved, the problems of scandium loss, entrainment, emulsification and the like of a traditional process are effectively solved, the coarse scandium purity is above 36%, organic phase, alkaline liquor and acid liquor can be recycled, chemical raw material consumption and pollutant discharge are reduced, and the production cost is reduced.

The invention provides a method and a system for confirming the contents of components in a natural material. The method for confirming the contents of the components in the natural material comprises the steps of acquiring the chromatogram of the natural material; when an overlapping region exits between chromatographic peaks of two adjacent components in the chromatogram, acquiring the proportion areas of all the components within the overlapping peak area; calculating the peak surface areas of all the components according to the proportion areas of all the components within the overlapping peak area; confirming the contents of the corresponding components according to the peak surface areas. The method and the system can be used for accurately measuring the contents of all the components in the natural material, thus providing an accurate data support for the qualitative and quantitative analysis of the natural material.

The invention discloses a magnetic porous carbon material and a preparation method and application thereof. The magnetic porous carbon material comprises porous carbon and nanoscale zero-valent iron, the diameter of the porous carbon is 6-10 mm, and the nanoscale zero-valent iron is loaded in the porous carbon. The millimeter-scale porous carbon is adopted to load the active substance nano zero-valent iron, so that the interference of soil particles or colloidal particles on the porous carbon can be effectively reduced, the adsorption and fixation effects on heavy metals are effectively improved, and the service life of the material is prolonged. Meanwhile, the millimeter-scale porous carbon is easy to recycle, so that the heavy metal can be extracted and separated from the polluted water body or soil, the content of the heavy metal in the water body or soil is reduced, and the recycling of the material is realized.

The invention discloses a method for detecting nitroimidazole antibiotics in honey and a sample treatment method. The sample treatment method comprises the following steps of: taking UIO-67@GO@Fe3O4 powder obtained by synthesizing graphene oxide, ferroferric oxide, zirconium tetrachloride and 4, 4'-diphenyldicarboxylic acid as an adsorption material; and adjusting the pH value of a honey sample to 3-7, carrying out magnetic solid-phase extraction by using the UIO-67@GO@Fe3O4 powder, and blow-drying desorbed eluent to obtain a treated honey sample. The treated honey sample is directly determined by adopting one or more of the existing nitroimidazole antibiotic determination methods. The method is simple and convenient to operate, time-saving and rapid, the adsorption material can be recycled, the detection result is accurate, and the method can be widely popularized and applied.