186results about "Dialysis" patented technology

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 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.

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 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.

The application discloses a kind of roll type diffusion dialysis membrane module and preparation method thereof, including cylinder, U-shaped tube;U-shaped tube straight pipe part upper end is connected respectively with the inlet and outlet pipe of diffusion liquid and dialysate;Wherein, between a pair of diagonal straight pipe parts, ion exchange membrane is equipped, and both sides of ion exchange membrane are equipped with a flow channel screen, above the pair of diagonal straight pipe parts, by ion exchange membrane and flow channel screen, spiral is wound into cylinder by mutual close, and the end of ion exchange membrane and flow channel screen winding is fixed on another pair of straight pipe parts respectively;Space supported by flow channel screen constitutes fluid channel and is always located at both sides of ion exchange membrane, one side constitutes diffusion liquid flow channel and is connected with a pair of diffusion liquid inlet and outlet connector communication, the other side constitutes dialysate flow channel and is connected with a pair of dialysate inlet and outlet connector communication, the application solves the problem that liquid inlet and outlet are difficult to set when multiple membrane modules are commonly processed in higher integrated degree and mass transfer efficiency is lower.

The present disclosure relates to a process for testing the integrity of membranes in a filter module. Specifically, the process is applied to filters for extracorporeal blood treatment, in particular, filters comprising both filter membranes and particulate material.

The invention relates to a closure cap for the sterilization or sterile filling of medical supplies, in particular for the sterilization of dialyzers and dialysis treatment kits. The closure cap is characterized in that the closure plug is connected to the base body of the closure cap by a releasable or movable connection (132) and the closure plug can be moved from an open position allowing passage of the sterilizing fluid to a sealed closed position.

In a fluorometer diagnostic mode, a system moves water and a fluorescent probe material from a mixing chamber to a fluorometer. In a filter diagnostic mode, the system moves water and a fluorescent probe material from the mixing chamber into an inlet such that (i) a first portion of the water and the fluorescent probe material moves out of a bypass outlet and back to the mixing chamber and (ii) a second portion of the water moves through the filter to the fluorometer. In a dialysate dispensing mode, the system moves a dialysate and the fluorescent probe material from the mixing chamber into the inlet such that (i) a first portion of the dialysate and the fluorescent probe material moves out of the bypass outlet and back to the mixing chamber and (ii) a second portion of the dialysate moves through the filter and to the fluorometer.

This invention discloses a method for preparing a blood purification dialysis membrane and its application, relating to the field of materials preparation technology. The method includes the following steps: S1, dissolving polyacrylonitrile powder in N-N-dimethylformamide solvent to obtain a PAN spinning solution; S2, spinning the PAN spinning solution using electrospinning to obtain a PAN nanofiber membrane; S3, depositing a multi-walled carbon nanotube solution into the interfiber gaps of the PAN nanofiber membrane to obtain a composite PAN nanofiber membrane; S4, subjecting the composite PAN nanofiber membrane to hot-pressing treatment to obtain the blood purification dialysis membrane. By combining electrospinning with multi-walled carbon nanotube deposition and hot-pressing processes, a composite membrane with a gradient pore size structure is constructed. This effectively removes small and medium-sized toxins while selectively retaining large-molecule proteins, solving the technical challenges of wide pore size distribution and difficulty in balancing toxin removal and protein retention in traditional dialysis membranes. It offers the advantages of precise membrane structure control and improved blood purification efficiency.

To provide a hollow fiber membrane with improved biocompatibility.SOLUTION: The present invention relates to a water insoluble antioxidant-containing hydrophobic and hydrophilic polymer-based hollow fiber membrane, in particular, relates to a hollow fiber membrane for blood extracorporeal treatment. The hollow fiber membrane has improved biocompatibility with respect to treated blood, and in particular, has improved complement activation and lower platelet loss improved for the treated blood. Simultaneously, hydrophilic polymer elution from a lumen of the hollow fiber membrane is reduced.SELECTED DRAWING: Figure 1

The disclosure relates to an extracorporeal blood treatment machine comprising a dialyzer (19) having hollow fibers (2) and a blood side (4) and a dialyzing fluid side (6), an extracorporeal blood circuit, and a dialyzing fluid circuit. The extracorporeal blood treatment machine has a control unit (48) which is configured and prepared to perform automatic priming of the blood treatment machine such that it sets a transmembrane pressure (10) with a pressure gradient from the dialyzing fluid side (6) to the blood side (4) and / or from the blood side (4) to the dialyzing fluid side (6) in order to remove air from the semipermeable membrane (8) during priming. The disclosure further relates to a method for priming a dialyzer (19) having hollow fibers (2) and to a computer program.

The invention relates to the technical field of biomedical materials, in particular to an anticoagulation hemodialysis membrane, a base material of the anticoagulation hemodialysis membrane is polysulfone or polyethersulfone, the anticoagulation hemodialysis membrane is of a porous asymmetric structure, and the inner wall surface, making contact with blood, of the hemodialysis membrane is of a bionic micro-nano composite structure. The structure comprises micron-sized bulges and nano-sized particles distributed on the surfaces of the micron-sized bulges, a zwitterionic polymer is covalently grafted on the surface of the micro-nano composite structure and the inner wall of a membrane pore channel; heparin molecules are covalently bonded to the tail end of the zwitterionic polymer. According to the anticoagulant hemodialysis membrane, the anticoagulant performance is qualitatively improved while the excellent mechanical strength, solute clearance rate and ultrafiltration performance of a traditional polysulfone membrane are kept.

Provided is a microfluidic dialysis module including an upper plate having an upper flow path through which a first fluid flows therein formed on one surface thereof, and an upper inlet through which the first fluid flows into the upper flow path and an upper outlet through which the first fluid flows out of the upper flow path; a lower plate having a lower flow path through which a second fluid flows therein, and having a plurality of lower inlets through which the second fluid flows into the lower flow path and a plurality of lower outlet through which the second fluid flows out of the lower flow path; a membrane disposed between the one surface of the upper plate and the one surface of the lower plate and formed in a porous membrane structure; and a fixing member coupling the upper plate and the lower plate.

A method for evaluating the clogging of a filter membrane containing a protein solution includes the following steps: step a), passing the protein-containing solution through the filter membrane; step b), obtaining a cross-section of the filter membrane after step a); step c), treating the protein-containing solution before step a), or treating the filter membrane before step b), or treating the cross-section of the filter membrane after step b), using at least one staining agent specific to protein aggregates; and step d), confirming the presence of protein aggregates in the cross-section of the filter membrane.

The invention relates to a method for processing a solid material comprising asbestos fibres, comprising the following steps: - grinding the solid material, - bringing the solid material into contact with an aqueous acid solution, resulting in at least some of the asbestos fibres being dissolved, - separating the liquid (5) and solid (4) fractions of the products resulting from the dissolving process. This method is characterised in that it further comprises the following steps: - diffusion dialysis of the liquid fraction (5) in order to produce a regenerated aqueous acid solution (9), - using the regenerated aqueous acid solution (9) in the step of bringing the ground solid material into contact with an aqueous acid solution. The invention also relates to a plant for carrying out the method according to the invention.