284results about "Dialysis" patented technology

The invention discloses an ion exchange membrane based on an intrinsic microporous polymer, and a preparation method and application thereof, and belongs to the technical field of high polymer materials. According to the application, 1, 3, 5-tri (4-aminophenyl) benzene (TAPB) and dimethyl formal are taken as polymeric monomers, a polymer with intrinsic sub-nano micropores and a corresponding homogeneous ion exchange membrane are prepared by utilizing the structural characteristics of rigidity and distortion of the TAPB, an ion transmission channel is formed by a unique micropore structure, and the sub-nano micropores have a size screening effect, so that the ion exchange membrane can be used for preparing the ion exchange membrane. The selective separation of monovalent / multivalent anions can be realized; after quaternization treatment is carried out on the membrane and a positively charged group is introduced, the positively charged group has a strong electrostatic repulsion effect, and selective separation of monovalent / multivalent cations can be realized, so that the polymer ion exchange membrane disclosed by the invention can be simultaneously applied to an acid-base recovery process, and has the characteristics of high selectivity, high permeation flux and stable long-term operation.

The invention provides a COF (at) POC composite film and a preparation method and application thereof. The preparation method comprises the following steps: a) dissolving a COF aldehyde monomer and a POC aldehyde monomer in an organic solvent to obtain a first solution; meanwhile, dissolving a COF amine monomer and a POC amine monomer in an organic solvent to obtain a second solution; b) mixing the first solution, the second solution and an acetic acid solution to obtain a homogeneous membrane casting solution; and c) dispensing the homogeneous casting membrane liquid, and reacting to obtain the COF (at) POC composite membrane. Compared with the prior art, the preparation method provided by the invention has the advantages that specific raw materials are matched with specific process steps and conditions, the overall better interaction is realized, and the prepared COF-POC composite membrane is good in mechanical strength and has high ion flux and excellent ion selectivity for monovalent and divalent ion separation; the method has a wide application prospect in the fields of seawater desalination, salt lake lithium extraction, drug separation and the like.

Methods for coupling ligands to composite materials are disclosed. A covalent bond is formed between the functionalized composite material and the ligand as the ligand solution flows through or across the composite material. The composite material can be used as a chromatographic separation medium.

The invention discloses a polyether sulfone hollow fiber blend membrane with polydopamine attached to the inner surface and a preparation method of the polyether sulfone hollow fiber blend membrane. The polyether sulfone hollow fiber blend membrane comprises the following raw material components: 10-20 wt% of polyether sulfone, 1-3 wt% of polydopamine, 5-10 wt% of a pore-foaming agent and 60-85 wt% of an organic solvent. The outer diameter of the hollow fiber membrane is 0.1-50 mm, the inner diameter of the hollow fiber membrane is 0.1-50 mm, the micropore diameter of the hollow fiber membrane is 0.01 mu m-1mm, and the porosity of the hollow fiber membrane is 50-95%; the invention has the following beneficial effects: the film can resist steam sterilization; and moreover, good hydrophilicity is achieved, and waste can be biodegraded.

The invention discloses an antibacterial nanofiber hemodialysis membrane and a preparation method thereof, and relates to the technical field of dialysis membranes, and the preparation method comprises the following steps: mixing a chitosan derivative, heparin, dopamine, an unsaturated monomer and an initiator in a DMF / phosphate buffer mixed solution to obtain a surface treating agent; taking the polyethersulfone nanofiber membrane as a supporting layer, dipping in a surface treating agent, and performing UV irradiation to form a functional layer, thereby obtaining the dialysis membrane. The preparation method comprises the following steps: compounding phenanthroline cerium triacrylate hybridized CeO2 with N-vinyl pyrrolidone, sodium p-styrenesulfonate and lauryl methacrylate to obtain an unsaturated monomer, compounding the unsaturated monomer with a chitosan derivative, heparin and dopamine to prepare a surface treating agent, impregnating a polyether sulfone nanofiber membrane, and carrying out irradiation curing to form a functional layer. The prepared hemodialysis membrane has efficient anticoagulation and broad-spectrum antibacterial properties, high permeability, low protein adsorbability and long-term stability.

The invention provides a resource recycling method of ammonium-containing waste sulfuric acid, which comprises the following steps: (1) respectively introducing a solvent and ammonium-containing waste sulfuric acid into two sides of a dialysis membrane for diffusion dialysis treatment, and respectively obtaining a sulfuric acid solution and an acidic ammonium sulfate solution on two sides of the dialysis membrane; and (2) carrying out bipolar membrane electrolysis treatment on the acidic ammonium sulfate solution to obtain ammonia water and ammonium-containing sulfuric acid. According to the method disclosed by the invention, sulfuric acid and ammonium ions (converted into ammonia water) in the ammonium-containing waste sulfuric acid can be efficiently and greenly recovered, the obtained ammonium-containing sulfuric acid can also be repeatedly recovered, and resource recovery of the ammonium-containing waste sulfuric acid is realized under the condition of ensuring low cost.

The invention discloses a preparation method of a covalent organic framework membrane based on interlayer modification. The preparation method comprises the steps of in-situ growth of a COFs layer, COFs modification, heat treatment, chemical crosslinking and solvent activation. According to the method, COFs are synthesized by only adopting an organic phase solution instead of adopting an aqueous phase solution, and acyl chloride or carboxylic acid is used for modifying the COFs to repair defects in a COFs layer and reduce the pore diameter of the COFs, so that the separation performance of the composite membrane is remarkably improved. The method is small in material consumption, simple in process, wide in application range, easy to amplify and realize industrial production, and has a good application prospect in the field of organic solvent system separation.

The application relates to the technical field of plasma separation, and discloses a water injection device of a plasma component separator, which comprises a bottom plate, a fixing mechanism arranged on the bottom plate, a fixed end and a moving end oppositely arranged in the fixing mechanism, the moving end being movable towards the fixed end to fix the plasma component separator between the fixed end and the moving end, one end of the moving end abutting against the plasma component separator being provided with a sealed suction chamber, the suction chamber being communicated with a fiber membrane of the plasma component separator, a vacuum pump joint being arranged on the moving end and communicated with the suction chamber, the vacuum pump joint being connected with a vacuum pump, a water pipe joint being arranged on the plasma component separator, one end of the water pipe joint being connected with a water inlet pipe, and the other end of the water pipe joint being communicated with a space at the end of the fiber membrane away from the suction chamber to inject water into the space, and the vacuum pump joint can suck water from one side of the fiber membrane into the suction chamber to complete wetting of the fiber membrane, so that a subsequent air detection process can be normally carried out, and the accuracy of the air detection result is ensured.

A method for synthesizing a hydrophilic graphene-modified polyurethane foam membrane, is described. The method includes functionalizing graphene oxide particles with tartronic acid to form a functionalized product having a hydrophilic functional group; and reacting the functionalized product with a polyurethane to form the hydrophilic graphene-modified polyurethane foam membrane. The hydrophilic graphene-modified polyurethane foam membrane has a water adsorption capacity of at least 20 g / g. The hydrophilic graphene-modified polyurethane foam membrane is adapted for a use selected from the use group consisting of oil and water separation, water treatment, desalination, and pharmaceutical filtration.

To provide biological fluid purification using a biocompatible membrane.SOLUTION: An apparatus for integrated adaptive biological blood purification includes a function unit. The function unit is provided with: a membrane including a pipe surface and a filtration surface; a blood vessel channel system which is adhered to the blood vessel surface of the membrane and includes a first lumen space in fluid communication with the blood vessel surface of the membrane, a first end configured to be in fluid communication with a fluid supply part and to contact the same, and a second end configured to be in fluid communication with a filtration fluid outlet and to contact the same; and a filtration channel system which is adhered to the filtration surface of the membrane and includes a second lumen space in fluid communication with the filtration surface of the membrane and a third end configured to be in fluid communication with a filtrate outlet and to contact the same.SELECTED DRAWING: Figure 11

The invention discloses a roll type diffusion dialysis membrane assembly and a preparation method thereof. The roll type diffusion dialysis membrane assembly comprises a cylinder body and a U-shaped pipe, the upper end of the straight pipe part of the U-shaped pipe is respectively connected with diffusion liquid and dialysis liquid inlet and outlet pipes; wherein an ion exchange membrane is arranged between a pair of diagonal straight pipe parts, two sides of the ion exchange membrane are respectively provided with a flow channel separation net, and the ion exchange membrane and the flow channel separation nets are tightly attached to each other to be spirally rolled into a barrel by taking the pair of diagonal straight pipe parts as the axis; the wound tail ends of the ion exchange membrane and the runner separation net are respectively fixed on the other pair of straight pipe parts; a space supported by the flow channel separation net forms a fluid channel and is always positioned on two sides of the ion exchange membrane, one side forms a diffusion liquid flow channel and is communicated with a pair of diffusion liquid inlet and outlet connecting pipes, and the other side forms a dialysate flow channel and is communicated with a pair of dialysate inlet and outlet connecting pipes; according to the invention, the problems of difficulty in arranging a liquid inlet / outlet and low mass transfer efficiency when a plurality of membrane modules with higher integration degree are used for common treatment are solved.

The utility model discloses an auxiliary device suitable for low-temperature circulation dynamic dialysis, and relates to the technical field of dialysis equipment, the auxiliary device comprises a stirring shaft, a plurality of supporting rod groups are arranged on the stirring shaft, each supporting rod group comprises a plurality of supporting rods, the supporting rods are arranged on the peripheral side face of the stirring shaft in an array mode, and the supporting rods are rotatably connected with the stirring shaft; and the plurality of hollow cages are arranged on the supporting rod in an array manner. According to the auxiliary device suitable for low-temperature circulation dynamic dialysis, the technical problems that according to an existing dialysis device, multiple samples are subjected to partition dialysis at the same time, a large number of samples are likely to be mixed and cannot be distinguished are solved, different dialysis bags are placed in the corresponding hollow cages, the multiple samples can be independently partitioned and subjected to dynamic dialysis at the same time, and the dialysis efficiency is improved. The risk of cross contamination caused by sample mixing and sample liquid leakage is effectively avoided, the movement range of the dialysis bag is limited through the hollowed-out cage, the dialysis bag is prevented from cracking in the dialysis process, and it is ensured that an experiment is conducted smoothly.

The inline liquid-degasser (degasser) includes a gassed tube and a degassed tube with openings formed through the respective walls. The degasser also includes a baffle between the gassed tube and the degassed tube that is configured to seal an interior of the gassed tube from an interior of the degassed tube. The degasser further includes a degassing chamber surrounding an exterior of the gassed tube, where the openings of the gassed tube communicate therewith. The degasser also includes a vacuum chamber disposed adjacent to the degassing chamber and a vacuum port disposed through a wall of the vacuum chamber. The degasser further includes a plurality of hollow fibers with open ends. The hollow fibers are formed into loop portions and crown portions, where the loop portions surround the gassed tube in the degassing chamber and the crown portions extend to the vacuum chamber.

The invention discloses a membrane separation material for purifying a sucralose-6-acetate alcoholysis product. The technology comprises three main parts, namely MOF (Metal Organic Framework) synthesis, membrane preparation and membrane dialysis separation. The method comprises the following steps: firstly, taking gamma-cyclodextrin and sodium hydroxide as raw materials, carrying out morphology adjustment by using hexadecyl trimethyl ammonium bromide, and synthesizing Na-gamma-CD-MOF by using a solvent method; then mixing the MOF material with N, N-dimethylacetamide and polyvinylidene fluoride in proportion to prepare a membrane casting solution, and preparing the membrane casting solution into a composite membrane material by using a phase inversion method; finally, the membrane is placed in a liquid phase dialysis device, dialysis separation is conducted on all components in the sucralose-6-acetate alcoholysis product, and efficient separation of impurities and efficient purification of the main product sucralose are achieved. The advantages of the membrane separation technology are fully utilized, conditions are mild, the device is simple, operation is convenient, and the method has good application prospects.

The purpose of the present invention is to provide a dialysis membrane capable of removing CPPs while suppressing a reduction in minerals and capable of being suitably used for blood processing including the adsorption of CPPs. The present invention pertains to a dialysis membrane comprising a hollow fiber membrane or a semipermeable membrane which is a flat membrane, wherein said dialysis membrane is used for blood processing including the adsorption of calciprotein particles which are complexes of calcium phosphate and proteins, and has a compound (A) in which a film-forming polymer constituting the semipermeable membrane has, in a portion other than terminals of a main chain, at least one electron-donating group selected from the group consisting of an amino group, a carboxy group, a phosphoric acid group, a phosphono group, a phosphino group, and a thiol group, and / or has, separately from the semipermeable membrane, at least one electron-donating group selected from the group consisting of an amino group, a carboxy group, a phosphoric acid group, a phosphono group, a phosphino group, and a thiol group.

Method for vacuum drying of products, in particular membrane filters (12), such as dialyzers, especially after washing or functional testing, using microwave energy and an atmospheric multi-mode microwave chamber (14) and a sealed, microwave-transparent vacuum housing (26), for example made of polytetrafluoroethylene, PTFE, in the multi-mode microwave chamber (14), wherein the vacuum housing (26) has at least two separate compartments (28) and a vacuum sensor (30) in each of the compartments (28) for individually monitoring a vacuum in the respective compartment (28), the method comprising: - Arranging at least one product in each of the at least two compartments (28) and sealing the at least two compartments (28), - Creating a vacuum in the sealed compartments (28), - Closing the multi-mode microwave chamber (14), - Generating and coupling microwaves into the multi-mode microwave chamber (14), - Measurement of individual vacuum pressures (P1, P2, P3, P4, P5) in the at least two compartments (28) using the vacuum sensors (30), and - Control of microwave vacuum drying depending on the individually measured vacuum pressures (P1, P2, P3, P4, P5) in the at least two compartments (28).

The utility model relates to the technical field of water treatment, in particular to a dialysis device for wastewater treatment, which comprises an assembly seat, at least one group of diffusion dialysis units, a liquid distribution plate and a temperature distribution part, the diffusion dialysis units are equidistantly arranged in the assembly seat, the liquid distribution plate is connected with the diffusion dialysis units, and the temperature distribution part is connected with the assembly seat. And the temperature distribution part is arranged on the diffusion dialysis unit. By means of the assembly composed of the assembly base, the diffusion dialysis unit, the liquid preparation plate and the temperature preparation part, treatment of waste water containing waste alkali liquid is achieved, a dialysis mechanism is provided, the diffusion rate of ions in the waste alkali liquid is increased by increasing the temperature in the diffusion dialysis unit and increasing the thermal movement speed of molecules, the ions are helped to pass through an ion exchange membrane more quickly, and the ion exchange efficiency is improved. The diffusion dialysis efficiency is improved.

The disclosure relates to devices and methods for extracorporeal conditioning of blood. Extracorporeal blood oxygenators and blood oxygenator components, such as conditioning modules, are described. An extracorporeal blood oxygenator includes a conditioning module having an external frame, an inlet cover, an outlet cover, and an internal chamber. A fiber assembly is disposed within the internal chamber and a potting material on the fiber assembly creates a circumferential seal that defines a passageway through the fiber assembly having a substantially circular cross-sectional shape. A fluid inlet is in fluid communication with the passageway, has a lumen that extends along an axis that is substantially perpendicular to the fiber assembly, and has an internal curvilinear surface adjacent the fiber assembly. A fluid outlet on the opposite side of the fiber assembly also has a lumen that extends along an axis that is substantially perpendicular to the fiber assembly.

The present invention relates to a method for diafiltration using a crossflow filtration unit for the continuous diafiltration of a food liquid to obtain a retentate and a permeate.

Systems and processes are directed to separating organic compounds using filtration. More particularly, systems and methods are directed to separating ethanol from an alcoholic beverage, the method including a filtration stage and a permeate separation stage. In the filtration stage, the method can include passing an alcoholic beverage comprising water, ethanol, and a flavor component through a filtration system that comprises a semipermeable membrane having a desired molecular weight cutoff, applying a pressure to the filtration system, thereby allowing ethanol and water to selectively pass through the semipermeable membrane, to provide a first permeate. In a permeate separation stage, the first permeate can be directed to a membrane contactor that comprises two or more internal contactor membranes, wherein a first side of the contactor membranes is contacted with the permeate, and a second side of the contactor membranes is contacted with a carrier gas..

The invention relates to an imidazolium functionalized polyimide anion exchange membrane for diffusion dialysis acid recovery and a preparation method of the imidazolium functionalized polyimide anion exchange membrane, and belongs to the technical field of polymer functional membrane materials. The method comprises the following steps: firstly, carrying out condensation polymerization on a dianhydride monomer BPA-2a and an aromatic diamine monomer to prepare intrinsic microporous polyimide PI-6B containing a hexabenzyl structural unit; performing bromomethylation modification on the polyimide PI-6B-Br by adopting liquid bromine to obtain brominated polyimide PI-6B-Br; and carrying out nucleophilic substitution reaction through an imidazole compound, and introducing an imidazolium cation functional group on a polymer main chain to obtain the imidazolium functionalized polyimide anion exchange membrane. The obtained anion exchange membrane has high ion exchange capacity, high acid dialysis coefficient and excellent acid / salt separation factors, and has good application prospects in the field of waste acid diffusion dialysis recovery.

A process for recovering chemicals from water treatment residuals (WTR) generated during a water treatment process, enabling the recycling of these chemicals into the treatment process. The process comprises the key steps of a) receiving WTR from a water treatment process, wherein the WTR contains at least one coagulant, b) leaching the coagulant metal compounds, from the WTR using an acid solution to produce a leachate, comprising metal ions and co-digested organics, and a thickened sludge, c) feeding the leachate into a Donnan Dialysis process, wherein the metal ions are separated from the organics using and concentrated into an acid sweep solution, and d) processing the acid sweep solution containing the coagulant metal ions through nano-filtration to separate the coagulant from the acid solution, thereby producing reusable coagulant and recovered acid and recycling these chemicals into the water treatment process.

An ion exchange membrane obtainable by curing a composition comprising: (a) a curable monomer comprising at least one anionic or cationic group; (b) a photoinitiator having an absorption maximum at a wavelength longer than 380 nm, measured in one or more solvents selected from the group consisting of water, ethanol, and toluene, at a temperature of 23°C; (c) at least one coinitiator; and, optionally, (d) a curable monomer that does not comprise an anionic or cationic group; wherein at least one of the curable monomers present in the composition comprises an aromatic group.

The invention relates to an electronic safety system for an RO installation (RO), which RO installation is designed for use with at least one dialysis device (D). For this purpose, the system comprises: the RO installation (RO), which is intended to produce ultrapure water and has a sensor unit (S) for capturing sensor data, the RO installation (RO) comprising an electronic data interface (RO-S) in order to transmit the sensor data captured by the sensor unit (S); an analysis apparatus (AE), which is intended to analyze a water sample of the RO installation with respect to safety requirements and in particular for contamination and to produce results data, the analysis apparatus (AE) also having an analysis interface (AE-S) in order to transmit the produced results data in electronic form; and a network (NW) for the exchange of data between the medical apparatuses, in particular between the RO installation (RO) and the analysis apparatus (AE).

The peritoneal dialysis ("PD") system (10) includes a PD machine (20), a patient line (50) extending from the PD machine (20), and a filter set (100) in fluid communication with the patient line (50), the filter set (100) including a filter membrane (120, such as a sterilizing grade or bacterial reducing filter membrane), the filter membrane (120) positioned and arranged such that fresh PD fluid flows through the filter membrane (120) into a filtered fluid compartment (106f), the filtered fluid compartment including an outlet (106t) to a port (106p), the port being in fluid communication with a spent PD fluid tubing (106u), the spent PD fluid tubing positioned and arranged to transport spent PD fluid past the filter membrane (120) without contacting the filter membrane (120). Methods of priming the filter set (100) are also disclosed.

The utility model provides a collagen dialysis frame and a dialysis device, and relates to the technical field of collagen preparation. The collagen dialysis frame is provided with a first surface and a second surface which are oppositely arranged, the collagen dialysis frame is provided with a plurality of mounting cavities penetrating through the first surface and the second surface, the mounting cavities are used for placing dialysis bags containing collagen, and the mounting cavities are communicated with one another; the side face, located between the first surface and the second surface, of the collagen dialysis frame is provided with a liquid flow channel, and the liquid flow channel communicates with the mounting cavity. The dialysis bag containing collagen can be prevented from densely floating on the surface of liquid, so that the dialysis effect is improved.

A method that regulates supply of substituate in an extracorporeal blood treatment with an extracorporeal blood treatment apparatus comprising a dialyzer divided by a semipermeable membrane into a blood chamber and a dialyzing fluid chamber and a device for supplying substituate. An extracorporeal blood treatment apparatus that includes a device for regulating supply of substituate. Regulation of supply of substituate in the extracorporeal blood treatment takes place as a function of the rheological loading of the dialyzer. To regulate supply of substituate during extracorporeal blood treatment, rheological loading of the dialyzer is determined from transmembrane pressure on the dialyzer and flow resistance of the dialyzer and substituate rate is increased or reduced according to the loading. The selection of dialyzer parameters or blood parameters is therefore no longer necessary and the distinction between pre-dilution and post-dilution is also made obsolete.

The invention provides a preparation method and application of a high-flux blood-compatible polyimide separation membrane, polyimide polymer powder is added into a solvent B, a quaternization reagent is added to obtain quaternization polyimide polymer powder, the quaternization polyimide polymer powder is added into a solvent C, and the high-flux blood-compatible polyimide separation membrane is obtained. And scraping the membrane casting solution by using a scraper to prepare an asymmetric separation membrane, and washing to obtain the high-flux blood-compatible polyimide separation membrane. The separation membrane applied to the field of biological water treatment is prepared through chemical imidization condensation reaction and quaternization reaction. The high-flux blood-compatible polyimide separation membrane obtained by the invention has excellent thermal stability, good mechanical properties, protein adsorption resistance, bacterial adhesion resistance, blood compatibility and anticoagulation capability. The method has wide application prospects in the fields of ultrafiltration, hemodialysis, purification, biological sewage treatment and the like.