17 results about "Membrane permeabilization" patented technology

The purpose of this invention is to provide a method for preparing a mixed matrix membrane for CO2 / CH4 separation, belonging to the field of gas separation technology. This method prepares a mixed matrix membrane by incorporating Cu(Qc)2 into a 6FDA-DAM matrix, which improves the limiting effect between the permeability and selectivity of the 6FDA-DAM membrane and greatly enhances the CO2 permeability coefficient and CO2 / CH4 selectivity.

This invention relates to the field of chemical separation materials technology, and specifically to a nitrogen-phosphorus co-doped starch-derived carbon and W 18 O 49 The method for preparing carboxylated polypyrrole integrated porous electrodes includes: synthesizing nano-W using a solvothermal method. 18 O 49 Using starch as the carbon source, sodium carboxymethyl cellulose as the pore-forming agent, and polyethyleneimine and phytic acid as nitrogen and phosphorus dopants respectively, nano-W 18 O 49 By mixing and molding, followed by freeze-drying and high-temperature carbonization, nitrogen-phosphorus co-doped starch-derived carbon and W were obtained. 18 O 49 A self-supporting porous electrode is obtained by electrochemical polymerization using a three-electrode system to deposit a carboxylated polypyrrole film on the electrode surface. This electrode features a three-dimensional porous structure, is binder-free, and integrates high specific capacitance, good conductivity, and ion-selective permeability. It is used in membrane capacitive deionization technology to treat uranium-containing wastewater, exhibiting high uranium removal rate, large electroadsorption capacity, short equilibrium time, and high membrane permeation flux, demonstrating broad application prospects.

A novel reverse osmosis or nanofiltration (RO / NF) system is developed that utilizes a uniquely configured membrane permeate flow path within the system to detect and respond to the onset of fouling, generating time-sensitive data. Membrane performance data under real-time operating conditions is then used to rapidly detect membrane fouling, fouling rate, and fouling causes. Subsequently, controller-based system-generated actions are employed to stop fouling and recover from or slow it down. Furthermore, operator intervention steps are anticipated, planned, and scheduled, if necessary, to restore optimal system operating conditions. The end result is a novel, energy-efficient, and advanced (machine learning) reverse osmosis system for brackish water desalination and fouling management.

This invention discloses a method for solid-liquid separation and resource recovery of mineral slurry, comprising the following steps: S1, chemical sedimentation pretreatment of mineral slurry: adding a sedimentation filter aid containing a main coagulant and an auxiliary flocculant to the mineral slurry, stirring and reacting, and then allowing it to settle to separate the upper clarified water and the bottom high-concentration concentrated mineral slurry; S2, deep solid-liquid separation using membrane technology: sending the concentrated mineral slurry into a dynamic rotating membrane separator for solid-liquid separation to obtain membrane permeate and solid filter media; S3, water resource recovery: classifying and reusing the upper clarified water and membrane permeate for mineral processing; S4, solid resource recovery: utilizing the solid filter media according to its composition, including as raw material for building materials, regrinding and reprocessing, or hydrometallurgy. This invention achieves efficient solid-liquid separation and synergistic recovery of water and solid resources through a combination of chemical sedimentation and dynamic membrane separation, offering advantages such as good separation effect, high water resource utilization rate, high solid resource recovery value, and low operating cost.

The invention relates to a method for providing a water-soluble adduct and an ibuprofen adduct, wherein the membrane permeability of the adduct is improved and the classification according to the Biopharmaceutics Classification System is influenced.

This invention relates to a self-optimization method for acetylene purification operating parameters based on the coupling of membrane permeation characteristics and operating conditions, belonging to the field of gas separation technology. The method includes: obtaining the functional relationship between the permeability coefficient of a single-component gas and pressure and temperature; establishing a response model of impurity removal rate and acetylene loss rate with transmembrane pressure difference and feed flow rate, introducing correction terms for adsorption saturation and diffusion mechanisms; defining a multi-objective function and constraints including product purity, impurity reduction, acetylene loss rate, and energy consumption; using an iterative optimization algorithm to obtain the optimal operating parameters; distributing the optimal parameters to the control system, and periodically correcting the model parameters based on online analysis feedback. This invention also integrates operational limit assessment and membrane performance degradation diagnosis functions. This invention transforms the actual permeation characteristics of membrane materials into executable operating parameters, reducing acetylene loss and energy consumption while ensuring high-purity acetylene, providing a quantitative design basis for the engineering scale-up of acetylene membrane separation and purification.

The application discloses an asymmetric viologen compound and application thereof in water-based flow batteries, and particularly relates to the following steps: taking 4,4'-dipyridine and iodomethane as starting materials, introducing hydrophilic groups such as phosphonic acid groups, sulfonic acid groups or quaternary ammonium salts into both ends of the dipyridine through two-step alkylation, and obtaining a high-purity target product after ion exchange. The derivative has high water solubility (>1.3 mol / L), low transmembrane permeability, a suitable redox potential and excellent electrochemical reversibility. The asymmetric viologen compound is used as a negative electrolyte active molecule, the TEMPO derivative is used as a positive electrolyte active molecule, a neutral salt is used as a supporting electrolyte, a titanium plate or a graphite plate is used as a current collector of the positive and negative electrodes, a graphite felt or a carbon felt is used as the positive and negative electrodes, a commercial anion exchange membrane is used between the positive and negative electrolytes, and a water-based flow battery is assembled. The preparation process is simple, raw materials are cheap and easy to obtain, and the application is suitable for large-scale energy storage systems.

The present invention addresses the problem of providing: a method for simply and accurately detecting a specific protein contained in extracellular vesicles; and a membrane permeabilization treatment agent that can be used in the method. A method for detecting a specific protein contained in extracellular vesicles, the method comprising (A) a step for capturing extracellular vesicles using a carrier capable of binding to an extracellular vesicle-specific marker which exists on the surface of extracellular vesicles, (B) a step for performing a membrane permeabilization treatment on extracellular vesicles captured by the carrier using a membrane permeabilization treatment agent, and (C) a step for introducing a reagent capable of detecting a specific protein contained in extracellular vesicles, into the extracellular vesicles subjected to the membrane permeabilization treatment, wherein the step (B) is carried out such that the specific protein is prevented from leaking off the extracellular vesicles, and the reagent can be introduced into the extracellular vesicles.

A system used for treating a net gas stream is described. The system includes a compressor to produce a compressed gas stream from the net gas stream. The compressor is connected to a pressure swing adsorption unit where the net gas stream is separated to produce a hydrogen product stream and a tail gas stream. The tail gas stream from the pressure swing adsorption unit is sent to a first membrane unit to produce a first permeate stream and a first non-permeate stream. A portion of the tail gas stream is sent to a second membrane unit to produce a second permeate stream and a second non-permeate stream.

The membrane permeability robust prediction method based on working condition adaptive division belongs to the field of sewage treatment and resource utilization. Due to the influence of different working conditions on the MBR sewage treatment process, unbalanced samples exist in the membrane pollution related data, which may reduce the prediction performance. In order to solve this problem, the present application proposes a membrane permeability robust prediction method based on working condition adaptive division to predict the membrane permeability. First, a cross-entropy index based on spatial membership calculation is proposed, which can adaptively divide the membrane pollution related data set by evaluating the data fluctuation characteristics of the input information; second, a nonlinear regression model is used to predict the membrane permeability. The results show that the method can effectively predict the value of the membrane permeability.

Provided are a gas separation system and a gas separation method with which it is possible to improve content ratio of a first gas in a recovery gas and improve recovery rate of the first gas with a simple configuration. The gas separation system according to one embodiment includes first to third separation units each equipped with a separation membrane, a permeate gas recovery unit, a return unit, a non-permeate gas recovery unit, and a permeate gas supply unit. The permeate gas recovery unit recovers a recovery gas containing a first permeate gas that has permeated a first separation membrane. The return unit returns, to a mixed gas supply unit, a return gas containing a third permeate gas that has permeated a third separation membrane. The permeable gas supply unit can be switched between at least two modes among a recovery mode, a return mode, and a stop mode. In the recovery mode, a second permeate gas that has permeated a second separation membrane is combined with a recovery gas. In the return mode, the second permeate gas is combined with the return gas. In the stop mode, supply of the second permeable gas to the permeable gas recovery unit and the return unit is stopped.

The application belongs to the technical field of nanofiltration membranes, and discloses a eutectic solvent-induced furan bio-based composite polyamide nanofiltration membrane, and a preparation method thereof, which comprises four steps of synthesis of difuran dimethylamine monomers, pretreatment of an ultrafiltration membrane, preparation of an aqueous phase / organic phase solution, and interfacial polymerization to form a membrane; the interfacial polymerization aqueous phase is a mixed solvent of a eutectic solvent-water, the difuran dimethylamine is a monomer, and the organic phase is a polyacyl chloride solution.The difuran dimethylamine with a biomass source is used as the monomer, and dependence on petroleum-based raw materials is eliminated; the eutectic solvent is used to solve the bottleneck of poor water solubility of the furan monomer, the monomer diffusion kinetics is controlled through high viscosity of the eutectic solvent, excessive cross-linking is inhibited, a uniform and dense polyamide separation layer is formed, the trade-off effect between traditional membrane permeability and selectivity is broken, and the synergistic improvement of high water flux and ultra-high Mg 2+ / Li + separation selectivity is realized, the prepared nanofiltration membrane has excellent permeability and magnesium-lithium separation efficiency, and can be widely applied in the fields of water treatment and lithium extraction from salt lakes.

This invention belongs to the field of membrane material technology and discloses a high-flux, acid-resistant polyquaternary ammonium nanofiltration membrane and its preparation method. The method includes: (1) coating an aqueous solution containing cyclic tertiary nitrogen oligomers onto a porous support substrate membrane, wetting it, and then removing excess liquid; (2) subsequently coating the surface of the material obtained in step (1) with a hexane solution containing benzyl bromide, wetting it so that the tertiary nitrogen atoms on the cyclic tertiary nitrogen oligomers undergo a quaternization reaction with the benzyl bromide, gradually forming a dense separation membrane at the water-hexane interface; after the reaction is completed, it is dried to obtain the nanofiltration membrane. The nanofiltration membrane prepared by this invention overcomes the disadvantages of traditional polyquaternary ammonium membranes, which require several hours to prepare and have low permeability. A defect-free nanofiltration separation membrane can be prepared in just 1 minute. After soaking in 1M sulfuric acid for 30 days, it can still maintain high permeability and rejection rate, showing good application prospects.

Disclosed are a facility and a method using the facility for treating a feed gas stream comprising at least methane and carbon dioxide by membrane permeation, the facility comprising: —a first membrane separation unit capable of receiving the feed gas stream and providing a first permeate and a first retentate, —a second membrane separation unit capable of receiving the first retentate and providing a second permeate and a second retentate, —a compressor for compressing the first permeate to a pressure of between 17 bar and 25 bar, —a means for cooling the first compressed permeate to a temperature lower than −40° C., —a distillation column for separating the first cooled permeate into a gas stream and a liquid stream, —at least one means for recycling the gas stream exiting the distillation column to the inlet of the first membrane separation unit, —a means for measuring the concentration of methane and / or carbon dioxide in the gas stream exiting the distillation column, —a means for comparing the concentration of methane and / or carbon dioxide measured by the measurement means with a target value, and —a means for adjusting the pressure and / or the temperature of the first permeate depending on the comparison carried out by the comparison means.

This invention belongs to the field of proton exchange membrane fuel cell technology, specifically relating to a combined power supply system and method integrating electricity, heat, cooling, and desalination. It includes a proton exchange membrane fuel cell power generation system, a micro gas turbine power generation system, a micro steam turbine power generation system, a membrane permeate distillation desalination system, and a regional cooling and heating subsystem connected by pipes and valves. The proton exchange membrane fuel cell power generation system is connected to the micro gas turbine power generation system; the micro gas turbine power generation system is connected to the micro steam turbine power generation system; the micro steam turbine power generation system is connected to the membrane permeate distillation desalination subsystem; and the membrane permeate distillation desalination subsystem is connected to both the regional cooling and heating subsystem and the proton exchange membrane fuel cell power generation system.

By separating water containing lithium ions and divalent cations through nanofiltration membrane treatment, lithium ions and divalent cations are separated highly efficiently. [Solution] A method for separating lithium ions, comprising a membrane separation step of a water to be treated containing lithium ions and divalent cations by nanofiltration membrane separation treatment to permeate lithium ions into membrane-permeated water and concentrate divalent cations into membrane-concentrated water, characterized in that the nanofiltration membrane has the following separation performance. <Separation performance of nanofiltration membranes> The magnesium ion removal rate R when passing a magnesium chloride aqueous solution with a magnesium equivalent concentration of 500 mg / L through water at any pH between pH 4 and 9. Mg (%) and the sodium ion removal rate R when passing a sodium chloride aqueous solution with a Na equivalent concentration of 500 mg / L through water. Na (%) Difference (R Mg -R Na ) is 20% or more.

The invention relates to a method for providing water-soluble taxane formulations, in particular a paclitaxel formulation and water-soluble formulations of paclitaxel derivatives, wherein the membrane permeability and the efficacy of paclitaxel and paclitaxel derivatives are improved and the classification according to the Biopharmaceutics Classification System is influenced.