1056 results about "Separation process" patented technology

The invention provides a metal material recycling device and a method for leaching fluorine beryllium thallium and lithium rubidium cesium in lithium slag. Relates to the field of metal material recycling, and comprises a leaching tank placed on the ground through four supporting frames, the top of the leaching tank is fixedly provided with a top cover, and the bottom of the leaching tank is fixedly provided with a bottom cover. According to the metal material recycling device and the leaching method for fluorine beryllium thallium and lithium rubidium cesium in the lithium slag, the ultrasonic generator is arranged to supply energy to the first ultrasonic transducer and the second ultrasonic transducer to generate ultrasonic waves, the ultrasonic waves generate microjet flow to impact the surface of minerals, acid liquor permeation and ion diffusion are accelerated, the leaching time is shortened, and the efficiency is improved; the surface of the lithium slag is not prone to passivation, the leaching rate of target metal ions is increased, the leaching liquid is pumped out through the water suction pump, manual contact with the leaching liquid in the next solid-liquid separation procedure is facilitated, dilute sulfuric acid is supplemented through the acid supplementing pipe, then the lithium slag is placed through the funnel, and the consistency and controllability of starting of the leaching reaction are guaranteed.

The invention relates to a waste liquid treatment device for automatically separating radionuclides. The waste liquid treatment device comprises a first waste liquid collection passage and a second waste liquid collection passage, an upstream liquid supply channel shared by the two channels comprises an injection pump and a multi-way valve, and the injection pump inputs liquid into the multi-way valve. The first waste liquid collecting channel directly guides cleaning liquid, replacement liquid and the like which do not need to be reserved into a waste liquid barrel through a first output port of the multi-way valve. The second waste liquid collecting channel is sequentially connected with a plurality of resin columns, a waste liquid tank, a peristaltic pump and a waste liquid barrel through a second output port of the multi-way valve, waste liquid generated by the resin columns firstly enters the waste liquid tank for temporary storage, and when the liquid level of the waste liquid tank reaches a preset threshold value, the peristaltic pump automatically pumps and discharges the waste liquid into the waste liquid barrel for centralized collection. The device can distinguish reserved liquid from waste liquid according to steps, realizes automatic flow division, temporary storage and discharge of the waste liquid, avoids manual pouring of the waste liquid halfway, ensures continuous operation of a long-time and multi-channel separation process, and reduces the risk of personnel exposure in a radioactive waste liquid treatment process.

The invention relates to the technical field of biological separation materials, and discloses an amine-functionalized magnetic nano composite material and application thereof in protein separation and purification. The material has a core-shell structure and comprises a magnetic ferroferric oxide nano core, an ordered mesoporous silicon dioxide intermediate layer and a covalent grafted polyethyleneimine functional layer. By controlling the matching relationship between the pore diameter of mesopores and the molecular size of the polymer and adopting a crosslinking strategy, the material has high magnetic responsiveness, rapid mass transfer performance and high-density surface amino groups. The material shows high adsorption capacity, rapid adsorption kinetics and good cycle stability in the protein separation process, and is suitable for enrichment purification and metal chelating affinity separation of protein in a biological sample. According to the invention, the technical problems of low protein adsorption capacity, slow dynamics and poor cycling stability caused by compact shell layer, non-uniform amino distribution and limited mass transfer of the existing amine functionalized magnetic material are solved.

The invention discloses a method for measuring the oxidation rate of silver ore, and relates to the technical field of mineral processing and process mineralogy analysis. The determination method comprises the following steps: preparing and segmenting a sample; silver grade calibration and reselection enrichment are carried out, and products with different mineralogical characteristics are obtained; carrying out automatic mineralogical analysis to obtain the type, content and dissemination characteristics of silver minerals; chemical leaching correction coefficient determination, wherein phase state distribution of silver is obtained through stepped chemical leaching, and the correction coefficient is calculated; determining a gangue wrapping correction coefficient, analyzing the silver content of the residue and calculating the correction coefficient; and finally, calculating the silver ore oxidation rate based on the automatic mineralogy analysis data and the correction coefficient. According to the method, through multi-technology fusion and data correction, the accuracy and reliability of measurement of the oxidation rate of the silver ore with low silver mineral content and uneven distribution are remarkably improved, and accurate data support is provided for formulation of a mineral separation process.

The invention discloses a method for separating an egg white polypeptide chain by adopting a coupling membrane, and particularly relates to the field of egg white polypeptide chains, the method comprises the following steps: S1, mixing fresh egg white with a buffer solution, adjusting the initial acid-base environment and initial temperature of a system, and measuring key basic parameters after dispersion treatment; s3, introducing the pretreated egg white liquid into a first-stage membrane assembly, monitoring separation process parameters, obtaining interception efficiency, dynamically adjusting operation parameters, and enabling permeate liquid to enter a second-stage membrane assembly; s7, monitoring system environment parameters and polypeptide activity, obtaining an activity retention rate, dynamically adjusting supply parameters, and maintaining the polypeptide activity; s8, classifying and collecting products according to molecular weight intervals, evaluating comprehensive separation efficiency, completing separation and verifying product indexes; by constructing an ultrafiltration membrane-nanofiltration membrane-reverse osmosis membrane three-stage coupling separation system and combining a dynamic parameter adjustment mechanism based on interception efficiency, separation selectivity and refined purity, the purity and separation efficiency of a polypeptide product are remarkably improved.

The invention relates to the technical field of rare earth element separation methods, in particular to a method for separating ytterbium and lutetium by using a phosphate adsorbent, which comprises the following steps: loading a phosphate solution on a porous solid-phase carrier by using a vacuum impregnation method, and carrying out reduced pressure evaporation and drying to obtain a phosphate solid adsorbent; filling an exchange column with the solid adsorbent to obtain the exchange column filled with the solid adsorbent; enabling a nitric acid solution containing ytterbium and lutetium to flow through an exchange column filled with a solid adsorbent to complete a column adsorption process; and performing elution, performing desorption by using a desorption solution to obtain the regenerated exchange column filled with the solid adsorbent, respectively collecting the ytterbium solution and the lutetium solution, completing the separation process, and repeating the steps. By adopting the steps, the separation of ytterbium and lutetium is directly realized from the nitric acid solution containing ytterbium Yb and lutetium Lu through column adsorption separation, leaching and desorption processes, and high-purity ytterbium and lutetium products are prepared.

The invention belongs to the technical field of perfume preparation processes, and particularly relates to a preparation process of fragrance lasting type perfume ligustral, which comprises the following steps: a catalytic dehydration step: mixing isohexylene glycol and a composite catalyst according to a mass ratio of 100: (0.8-1.2), and carrying out a catalytic dehydration reaction under a gradient heating condition to generate a methyl pentadiene mixture; a Diels-Alder addition step: carrying out an addition reaction on acrolein and a methyl pentadiene mixture according to a mass ratio of 1: (1.05-1.15) under a sectional temperature control condition, controlling the reaction pressure to be 0.25-0.35 MPa, carrying out a heat preservation reaction for 2 hours, and cooling to obtain a ligustral crude product; and a three-tower series rectification step: separating and purifying the ligustral crude product after the addition reaction through a light component removal tower, a middle component removal tower and a refining tower in sequence to obtain a ligustral finished product. By optimizing a catalytic system, reaction conditions and a separation process, the purity and aroma durability of the product are improved.

The invention relates to the technical field of waste gas separation, and discloses a low-energy-consumption recovery method and system for organic waste gas, and the method comprises the steps: analyzing the volatile solvent component concentration, concentration fluctuation data, solvent recovery energy consumption correlation factors and temperature and humidity data of the organic waste gas through multi-source coupling, and obtaining a characteristic coupling feature set; analyzing key process conditions of waste gas separation based on the feature set feed-forward situation to obtain optimal energy consumption operation parameters; the parameters and conditions of the waste gas separation process are optimized in combination with the parameters and feature set dynamic constraint, and a Pareto optimal scheme is obtained; selecting a scheme as an optimal control strategy according to separation efficiency dynamic characteristics and energy consumption stability key factors in the feature set; the digital twinning collaborative deduction control strategy and feature set is coded into a separation control instruction; based on recovery energy efficiency verification and product quality detection indexes after actual operation, performing feedback optimization to obtain a low-energy-consumption instruction generation strategy; the low-energy-consumption recovery efficiency of the organic waste gas can be improved.

The invention relates to the technical field of wastewater treatment equipment, in particular to an automatic separation process and device for heavy metal sediment in wastewater treatment.The device comprises a sediment separation pond used for containing wastewater, and a sediment collection barrel used for containing sediment in the wastewater is arranged in the sediment separation pond; an opening is formed in the upper portion of the sediment collecting barrel, a push plate is arranged above the opening, the sediment collecting barrel is provided with a barrel side wall and a barrel bottom plate which can be separated, and the barrel side wall and the push plate are connected with a separation driving mechanism. The separation driving mechanism can drive the barrel side wall and the push plate to get close to each other so as to push wastewater and sediments to be discharged along a gap between the barrel side wall and the barrel bottom plate, so that the sediments fall into different areas to be collected. As the shapes of parabolas generated by the sediments with different densities are different, the horizontal distances between the sediments with different densities and the sediment collecting barrel are different after the sediments with different densities fall into the bottom, so that different heavy metal sediments can be separated.

The invention relates to the technical field of washing water treatment, and discloses a gradient type oil-solid and water pure physical separation system and method for MTO washing water.The separation system comprises a liquid inlet pipe, a liquid inlet valve and a liquid inlet pump are installed on the liquid inlet pipe, and a secondary deslagging system, a secondary oil-water separation system and a buffer water storage tank are sequentially connected to the liquid inlet pipe in the liquid inlet direction; a liquid level sensor and a backwashing system are mounted on the buffer water storage tank; the backwashing system is sequentially communicated with the secondary deslagging system and the secondary oil-water separation system; a buffer flow guide mechanism is installed at the liquid inlet end of the second-stage deslagging system, and a stepped filler assembly is installed in the second-stage deslagging system. A physical gradient separation process is adopted, step-by-step accurate removal from macroscopic particles to microscopic emulsified oil and efficient recovery of oil phase components in wastewater can be realized, the turbidity and solid content indexes of effluent are remarkably improved, and long-period continuous stable operation can be realized.

The invention relates to a novel quaternary ammonium salt modified positively charged nanofiltration membrane and a preparation method thereof, and belongs to the technical field of membrane separation. Adding the prepared novel quaternary ammonium salt monomer QAC serving as an additive into a water-phase solution containing an amine monomer and lauryl sodium sulfate (SDS) to form a mixed water-phase solution; and carrying out polymerization reaction with acyl chloride monomers in an oil phase on a water-oil interface by an interfacial polymerization method to realize preparation of the novel quaternary ammonium salt modified positively charged nanofiltration membrane. The QAC monomer serving as a novel end-capping reagent can react with acyl chloride groups in acyl chloride monomers in the interfacial polymerization process, so that further reaction between the QAC monomer and amine monomers in a water phase is prevented, the crosslinking degree of a macromolecular network structure in the polymerization process is reduced, and the permeation flux of the composite membrane is favorably improved. Meanwhile, the quaternary ammonium salt structure also effectively enhances the positive charge density of the surface of the nanofiltration membrane, so that the interception performance of the nanofiltration membrane on divalent magnesium ions in the magnesium-lithium separation process is enhanced, and efficient separation of magnesium and lithium is realized.

The invention relates to the technical field of methane preparation, and discloses a methane preparation system based on carbon dioxide capture coupling electrolytic hydrogen production. According to the system, a trapping module is used for separating and purifying carbon dioxide from industrial waste gas through a pressure swing adsorption technology; the electrolysis module utilizes a proton exchange membrane electrolytic bath to decompose deionized water to generate high-purity hydrogen; the proportioning module is used for accurately mixing carbon dioxide and hydrogen according to the stoichiometric ratio of 1: 4 to form reaction raw materials; the catalysis module performs a Sabatier reaction under the action of a nickel-based catalyst to convert carbon dioxide and hydrogen into methane; the condensation module separates water vapor through cooling condensation to obtain a purified methane product. The technical problems of low system integration level and unstable conversion efficiency caused by lack of accurate control algorithms in the processes of carbon dioxide capture, electrolytic hydrogen production, gas proportioning, catalytic methanation and product separation in the prior art are solved.

The invention discloses an enhanced separation device and method for washing, solid removal and defoaming of a coal liquefaction system. The enhanced separation device comprises a vertical tank body, and a gas outlet and a solid-liquid outlet are formed in the top end and the bottom end of the vertical tank body respectively; a momentum fin unit, a micro-washing spraying device, an inlet separation distributor and a hydraulic spray head are sequentially arranged in the vertical tank body from top to bottom, and a material inlet is formed in the position, corresponding to the inlet separation distributor, of the side wall of the vertical tank body; the momentum fin unit and the micro-washing spraying device are positioned above the inlet separation distributor; the hydraulic spray head is obliquely upwards arranged on the inner wall below the inlet separation distributor; and the solid-liquid outlet is connected with a circulating pump through a pipeline. The device is compact in structure, the separation process is simplified, fine particles are trapped and separated only through gravity settling, the inertia effect and the like, and efficient and stable operation of the system is facilitated.

The invention relates to a method and a system for recovering hydrogen in mixed gas by using a pressure swing adsorption and membrane separation method. The method comprises the following steps: S1, preliminary impurity removal: carrying out multi-layer adsorption impurity removal on mixed gas containing silane, disilane and hydrogen, and cooling to 22-28 DEG C; s2, pressure swing adsorption: feeding the mixed gas subjected to primary impurity removal into a pressure swing adsorption device, wherein an adsorbent in the adsorption device is modified activated carbon which is activated at high temperature and is loaded with 3-5% of copper oxide on the surface; s3, membrane separation and adsorption: the mixed gas passing through the pressure swing adsorption device enters a filter and a dryer, and finally passes through a membrane separation device, silane and disilane are collected on the enrichment side of the membrane separation device for further purification, and hydrogen is collected on the permeation side of the membrane separation device for further purification. According to the invention, a process of combining pressure swing adsorption and a membrane separation method is adopted, the advantages of the two technologies are fully exerted, and efficient separation of silane, disilane and hydrogen is realized.

The invention belongs to the technical field of pipeline safety, and particularly relates to an intelligent self-cleaning flame arrester device. The device comprises a cyclone separation device, a fire retardant device, a solid-liquid separation device and an intelligent cleaning system, large-particle impurities can be removed in the impurity pre-separation process based on the cyclone separation device, the blockage probability and the cleaning frequency of a fire retardant core are reduced, the production continuity is improved, and meanwhile, the production efficiency is improved. According to the intelligent cleaning system, the design of multi-angle nozzle mounting holes and nozzle base rotation is adopted, full-coverage cleaning of the end face of the fire-retardant core is achieved, cleaning dead angles are reduced, a heating module of the intelligent cleaning system can further dehydrate and dry pipeline gas, oil stains, impurities and the like blocking the fire-retardant core are made to fall off more easily, and the cleaning efficiency and effect are further improved.

The invention belongs to the technical field of haematococcus separation, and particularly relates to a method for sequentially separating polysaccharide and phycoerythrin from a haematococcus degreased algae residue water extract, and the method comprises the following steps: S1, pretreatment, S2, deep flocculation and primary separation of polysaccharide, and S3, specific precipitation of phycoerythrin. According to the method, a set of sequential separation process is constructed by adopting a self-made hydrophobic flocculant and a composite precipitation inducer, so that a high-purity polysaccharide product and a high-activity phycoerythrin concentrated solution can be synchronously obtained from a haematococcus degreased algae residue water extract. According to the method, deep flocculation of polysaccharide, specific precipitation of phycoerythrin and respective subsequent refining steps are integrated into an ordered whole process, so that the product in the previous step can be directly treated in the next step in an optimal state, and the loss possibly caused by storage and transfer of intermediate materials is reduced; through condition matching and cooperation among the steps, the purity of the final product is improved.

The invention discloses a device and a method for intelligently regulating and controlling liquid-liquid continuous separation of plant extracts, and belongs to the field of plant extract separation. The device comprises a mixing and concentrating device, a gravity type liquid-liquid separator and a data processing unit; the mixing and concentrating device is provided with a mixer, a film evaporator and a first near-infrared spectrometer; the gravity type liquid-liquid separator is provided with a plurality of flowmeters and a second near-infrared spectrometer; the method comprises the following steps: constructing a concentrated solution prediction model, monitoring parameters such as spectral data, temperature, stirring speed, flow and the like of the concentrated solution in real time, analyzing data through a data processing unit, optimizing a separation process by adopting a fuzzy PID control algorithm, regulating parameters such as interface height, temperature, stirring speed and the like in real time, and realizing accurate control on separation efficiency and separation effect. According to the invention, precise monitoring and regulation of liquid-liquid continuous separation of the plant extract are realized, and the separation efficiency and the separation effect are improved.

The application discloses an asphaltene separation device and an asphaltene separation method. The asphaltene separation device comprises a separation cabin, the separation cabin is in a cylindrical structure, electric heating wires are filled between the inner wall and the outer wall of the separation cabin, the electric heating wires are connected with temperature sensors, a stirring shaft is penetrated through the center of the end face of the bottom end of the separation cabin, stirring blades are sleeved with the end part of the stirring shaft, the stirring blades are in the separation cabin, the end part of the stirring shaft is connected with a stirring motor, and the stirring motor is outside the separation cabin. The asphaltene separation device and the separation method solve the problem that a long time is consumed in the asphaltene separation process, and meet the demand of people for rapid asphaltene separation. The asphaltene separation device is provided with a stirring device composed of a stirring shaft and stirring blades, the dissolution and separation time is reduced through the stirring mode, and the temperature sensors and the electric heating wires are provided, so that the temperature in the separation cabin can be accurately controlled, and the dissolution speed of solutes is accelerated.

The application discloses a rapid evaporation separation process of m-toluic acid, mainly including five steps of MX removal rapid evaporation, IPA removal rapid evaporation, MTA removal rapid evaporation, IPA refining and MTA refining. The process has the characteristics of short operation period, good separation effect and high MTA yield, and can recover IPA as a by-product, thereby avoiding generation of a large amount of residues.

The present disclosure relates to methods for quantifying both lipid and nucleic acid cargo components of LNP formulations simultaneously, i.e., in a single chromatography separation process. In some embodiments, the methods comprise ion-pair reversed-phase high performance liquid chromatography (IPRP-HPLC) separation coupled with ultraviolet (UV) and charged aerosol detection (CAD). In some cases, the methods allow for quantification of the content of several different lipid and nucleic acid species in a single LNP formulation simultaneously, thus allowing for efficient characterization of LNP formulations, for example, for process control of pharmaceutical or test formulations.

The application provides an assisted permeation roll type membrane assembly. Compared with the prior art, the assisted permeation roll type membrane assembly provided by the application can realize high concentration of raw liquid under low operating pressure; in addition, the membrane assembly can also be used in a forward osmosis membrane separation process. By introducing an assisted permeation liquid on the permeation liquid side of the RO or NF membrane in the assembly, the osmotic pressure on both sides of the membrane can be reduced, and then the pressure applied on the raw liquid side can be reduced, and the pressure can be regulated by adjusting the components of the assisted permeation liquid, so as to reduce the pressure and cost of solution concentration and improve the concentration ratio. The assisted permeation roll type membrane assembly provided by the application can be applied to industrial wastewater zero discharge, seawater desalination, material separation and other industrial fields, and can also be used as a forward osmosis, diffusion dialysis, gas separation, organic solvent nanofiltration and organic solvent reverse osmosis and other membrane separation processes in addition to reverse osmosis and nanofiltration.

The invention relates to a method for monitoring and / or controlling a CO2 separation apparatus (10) for separating CO2 from a supplied gas flow (14), in particular air flow (14), from the surroundings, in which method the weight and / or expansion of in particular free flowing CO2 separation agents are / is measured, in particular by means of a sensor unit (42), when the CO2 separation process and / or the CO2 release process is carried out, and an information signal and / or control signal are / is output.

The utility model discloses a sectional type simple three-phase separation device which comprises a cyclone separation section, an air flotation separation section, a static settling section and a filtering control section which are sequentially connected in series in the material flowing direction, and all the sections are fixed through flanges to form a closed tank body; an outlet of the cyclone separation section is connected to an inlet of the air flotation separation section through a pipeline; according to the cyclone separation section disclosed by the utility model, gas with relatively low density is quickly gathered and discharged from the top by utilizing high-speed rotational motion of the cyclone, and meanwhile, the gas content in liquid is reduced, so that the subsequent separation process is prevented from being interfered by the gas. The air flotation separation section releases tiny bubbles through a bubble generator, the bubbles are attached to the surfaces of oil drops, the density of the bubbles is reduced, the bubbles are accelerated to float to an oil collecting tank, and oil-water separation efficiency is improved. The static settling section controls the flow rate of liquid through an adjustable partition plate, so that fine oil drops and suspended particles are fully settled in a low-flow-rate environment, the impurity content is reduced, and it is ensured that the discharged water quality reaches the standard.

The present application relates to the technical field of extracting rare earth, and particularly relates to an extraction rare earth separation process method. Fluorine-carbon cerium ore crude ore is treated to obtain activated ore powder. The activated ore powder is subjected to alkali pressure boiling oxidation, roasting transformation and optimal dissolution leaching to obtain a purified liquid. The purified liquid is then subjected to barium chloride sulfuric acid removal, lead removal by sulfurized lead, pH adjustment and the like to obtain a low-impurity chlorinated rare earth liquid. The chlorinated rare earth liquid is subjected to multi-stage extraction to obtain a neodymium chloride solution, a praseodymium-neodymium chloride solution and a lanthanum-cerium chloride solution. The solutions are subjected to oxalic acid precipitation and calcination to obtain a rare earth oxide product. The present application adopts fine pretreatment, multi-stage differential extraction and purification processes to achieve efficient separation of lanthanum-cerium, praseodymium-neodymium and neodymium in fluorine-carbon cerium ore and improve product purity.

This invention relates to the field of fine chemical technology, specifically disclosing a production process for electronic-grade diethyl carbonate. The method includes the following steps: ethylene carbonate and anhydrous ethanol undergo a transesterification reaction in a microwave reactor catalyzed by a composite catalyst; the reaction solution is then subjected to phase separation treatment, followed by a continuous separation process coupling atmospheric and vacuum distillation to obtain an intermediate; further purification is achieved by molecular sieve adsorption to remove metal impurities and moisture, combined with precision filtration using a polytetrafluoroethylene membrane. The composite catalyst significantly improves the transesterification reaction efficiency and product selectivity. This process, through the synergistic effect of reaction process enhancement and multi-stage purification technology, achieves highly efficient removal of moisture, metal impurities, and nanoscale particles from the reaction system. The resulting electronic-grade diethyl carbonate meets the stringent requirements of high-end electronic chemicals such as lithium battery electrolytes, and possesses technical advantages such as short reaction cycle, thorough impurity removal, and high product purity.

The invention relates to the field of utilization of nonferrous smelting slag, in particular to a flotation separation process for anosovite in titanium-containing electric furnace smelting slag. Comprising the following steps: microwave heat-preservation roasting: putting titanium-containing electric furnace melt separation slag into a microwave furnace for heat-preservation roasting to obtain roasted slag; crushing and grinding: crushing and grinding the roasting slag in the step 1 to obtain melt separation slag powder; carrying out alkaline leaching or acid leaching on the melt separation slag powder obtained in the step 2, and washing and filtering to obtain alkaline leaching slag or acid leaching slag; and flotation is conducted, specifically, ore pulp is prepared from the acid leaching residues / alkaline leaching residues obtained in the step S3, an inhibitor, a trapping agent and a foaming agent are sequentially added into the ore pulp with the PH being 5-11, and anosovite in the titanium-containing electric furnace melt separation residues is separated out through flotation. By implementing the scheme, the extraction rate of anosovite is improved.

This invention relates to the field of aromatic hydrocarbon separation and discloses a method for separating narrow fractions of C10 crude aromatic hydrocarbons. The method first performs component analysis on the C10 crude aromatic hydrocarbons to be separated to determine the content of low-boiling indicator components, medium-boiling target components, easily crystallizing components, and high-boiling tailing components. Then, the light-end and heavy-end components are removed by a pre-cutting tower to obtain the C10 main fraction. Subsequently, the C10 main fraction is fed into a multi-side-stream vacuum fractionating tower to collect low-boiling, medium-boiling, and high-boiling narrow fractions. A portion of the medium-boiling narrow fraction enters a side-stream crystallizer to obtain crystals and crystallization mother liquor. Based on the deviation of the low-boiling indicator components and high-boiling tailing components in the crystallization mother liquor, the crystallization mother liquor is returned to a position within the tower above or below the medium-boiling narrow fraction outlet. This method can correct the collection boundary of the medium-boiling narrow fraction based on the feed composition and side-stream crystallization state, reduce tailing entrainment between adjacent narrow fractions, and improve the stability of the C10 crude aromatic hydrocarbon narrow fraction separation process.

The invention provides novel azeotrope-like compositions and separation processes utilizing the same. An azeotrope-like composition comprising 1,2-difluoroethylene (HFO-1132) and hydrogen fluoride. An azeotrope-like composition comprising 1,1,2-trifluoroethylene (HFO-1123) and hydrogen fluoride. A separation process for a composition comprising at least one member selected from the group consisting of trans-1,2-difluoroethylene (HFO-1132(E)), cis-1,2-difluoroethylene (HFO-1132(Z)), and 1,1,2-trifluoroethylene (HFO-1123) and hydrogen fluoride.

The application relates to the technical field of plant raw material separation and extraction devices, and discloses a separation and extraction device for natural plant raw materials, which comprises a separation assembly and further comprises a pressure assembly arranged on the separation assembly and an accelerated liquid discharge assembly arranged on the separation assembly. The separation assembly comprises a support frame, a soaking box is arranged on the top of the support frame, a sealing cover is movably sleeved on the top of the soaking box, a support frame is movably sleeved on the top of the soaking box, a net box is connected to the bottom of the support frame and located in the soaking box, mounting frames are connected to the two sides below the back of the soaking box, and servo motors are mounted on the bottom of the mounting frames. The design can separate the precipitate at the bottom of the soaking box from the extraction liquid, so that the phenomenon that the precipitate blocks the liquid discharge pipe during the separation process is prevented, and the problem that the precipitate is discharged together with the extraction liquid in a large amount is prevented.

The application belongs to the technical field of membrane materials, and particularly relates to a method for preparing a Janus membrane hydrophobic layer from modified hydrophobic polymer nanofibers. The method uses secondary deep exfoliation to obtain single-layer high-fluorinated graphene oxide nanosheets, which are used as hydrophobic polymer additives in the preparation of the hydrophobic layer in the electrospinning process to induce the formation of uniform bead structures, promote the formation of finer nanofibers, more microspheres, and larger pore diameters. The Janus membrane prepared with the hydrophobic layer can significantly improve the permeation flux and / or oil-water separation efficiency in the oil-water separation process, and has excellent cycle stability.