60results about How to "Increase membrane area" patented technology

A system, method and device are disclosed for bio-processing a feed stream and providing a constant output by operating a continuous single-pass tangential-flow process. The single-pass process provides high conversion concentration while operating at relatively low feed flow rates, and the process can also be used to provide constant output diafiltration.

Filtration device suited for concentration of liquid samples, particularly biomolecules, and a method of concentrating, desalting, purifying and / or fractionating liquid samples. In certain embodiments the device includes a housing having a sample reservoir, and two substantially vertically oriented and spaced apart membranes disposed in the housing. An underdrain is associated with each membrane such that fluid passing through each membrane flows through a respective underdrain into a filtrate collection chamber. The fluid that does not pass through the membrane is collected in the retentate collection chamber, and can be recovered such as by a reverse spinning step, achieving recoveries greater than about 90%. The substantially vertical orientation of the membranes increases the available membrane area by at least 2.7 times the area available in a conventional filter device. The two-panel configuration also maintains more available membrane area in use during the last stages of filtration than a one-panel configuration.

The present invention provides, in various embodiments, hybrid single-pass tangential flow filtration assemblies, disposable single-pass tangential flow filtration assemblies, scalable single-pass tangential flow filtration assemblies and adaptable modular single-pass tangential flow filtration assemblies. In other embodiments, the invention relates to processes for recovering proteins from the surface of a filtration membrane in a single-pass tangential flow filtration assembly and for cleaning a tangential flow filtration assembly. In additional embodiments, the invention provides methods of increasing the processing capacity of a single-pass tangential flow filtration assembly.

Filtration device suited for concentration of liquid samples, particularly biomolecules, and a method of concentrating, desalting, purifying and / or fractionating liquid samples. In certain embodiments the device includes a housing having a sample reservoir, and two substantially vertically oriented and spaced apart membranes disposed in the housing. An underdrain is associated with each membrane such that fluid passing through each membrane flows through a respective underdrain into a filtrate collection chamber. The fluid that does not pass through the membrane is collected in the retentate collection chamber, and can be recovered such as by a reverse spinning step, achieving recoveries greater than about 90%. The substantially vertical orientation of the membranes increases the available membrane area by at least 2.7 times the area available in a conventional filter device. The two-panel configuration also maintains more available membrane area in use during the last stages of filtration than a one-panel configuration.

The invention discloses a polyacrylonitrile membrane with supporting materials and a preparation method thereof. The preparation method is characterized by comprising the following steps: taking calcium nitrate or lithium nitrate as an oxidant, polyethylene glycol or polyvinylpyrrolidone as a pore-forming agent and one or two of N,N-dimethylacetamide and N,N-dimethylformamide to prepare a polyacrylonitrile hollow fibrous membrane by a dry-wet method, ensuring monofilaments to enter into a spinneret via other inlets and carrying out blending to prepare the polyacrylonitrile hollow fibrous composite membrane with the supporting materials, wherein the monofilament fibrous materials are polyester, spandex, nylon 6, nylon 66 or polyurethane and have diameter of 0.01-2mm. The membrane and the preparation method have the following beneficial effects: the defect that the hollow fibrous membranes without supports have insufficient physical tensile strength and are easy to suffer from filament break is overcome; the physical tensile strength of the membrane disclosed by the invention is improved by more than several times compared with that of the hollow fibrous membranes without supports; support and membrane stripping can be avoided; the water flux and manufacturing cost of the membrane disclosed by the invention are equivalent to the water flux and manufacturing cost of the hollow fibers without supports; and the membrane can replace the existing hollow fiber products and has great economic and social benefits.

Disclosed are a nanofiltration composite hollow fiber membrane and a method of manufacturing the same. The nanofiltration composite hollow fiber membrane includes a reinforcement (1) which is a tubular braid, a polymeric resin thin film (2) coated on the outer surface of the reinforcement (1), and a polyamide active layer (3) formed on the outer surface of the polymeric resin thin film. The present invention has an advantage of an excellent strength and an increase in membrane area relative to an installation area.

A seal ring holder for membrane elements which is capable of attaining an increase in the area of membranes packed per element; and a membrane element using the seal ring holder, are provided. The seal ring holder for membrane elements which is disposed at an end part of a spiral wound membrane element to hold a ring seal ring on the outer periphery thereof while allowing a raw liquid to flow into a membrane end part of the membrane element, includes: a first ring part which has a side wall facing an upstream-side membrane end part of the membrane element and is inserted into an end part of a sheathing member of the membrane element; a projecting ring part which has been formed upstream from the first ring part and has side walls respectively on both sides, an edge face of the sheathing member and the downstream-side edge face of the seal ring being fixable respectively to the side walls; a second ring part which is formed upstream from the projecting ring part and to the outer periphery of which the seal ring is to be fitted; and a third ring part which is formed upstream from the second ring part and to which the upstream-side end face of the seal ring is fixable.

The invention discloses a polysulfone hollow fibrous membrane with supporting materials and a preparation method thereof. The polysulfone hollow fibrous composite membrane with the supporting materials is prepared a method comprising the following steps: preparing the polysulfone hollow fibrous membrane by a dry-wet method by taking Tween 20 or polyethylene glycol as an additive and N,N-dimethylacetamide or N-methylpyrrolidone as a solvent, ensuring monofilaments to enter into a spinneret from other inlets and blending the polysulfone hollow fibrous membrane with the monofilaments, wherein the monofilament fibrous materials are spandex, nylon 6 or polyurethane and have diameter of 0.01-2mm. According to the invention, the defect that the hollow fibrous membranes without supports have insufficient physical tensile strength and are easy to suffer from filament break is overcome; the physical tensile strength of the membrane disclosed by the invention is improved by more than several times compared with that of the hollow fibrous membranes without supports; support and membrane stripping can be avoided; the water flux and manufacturing cost of the membrane disclosed by the invention are equivalent to those of the hollow fibers without supports; and the membrane has technical and economic breakthroughs, can replace the existing hollow fiber products and has great economic and social benefits.

The invention provides a system for fermenting synthesis gas to produce alcohol and processing method thereof. The system comprises a bubble-free gas supply membrane component, a bioreactor and a pervaporation membrane component, wherein the bubble-free gas supply membrane component is placed in or out of the bioreactor, the gas inlet of the bubble-free gas supply membrane component is connected with the synthesis gas; a fermentation liquor outlet of the bioreactor is connected with a feed port of the pervaporation membrane component, a trapped liquor outlet of the pervaporation membrane component is connected with a material inlet of the bioreactor. The system and method provided by the invention improve the gas liquor transmission efficiency, the gas utilization efficiency, the microorganism cell concentration and the product concentration in a mixed gas fermentation process by use of the bubble-free gas supply membrane technology in double-end or single-end gas inlet, and in combination with a fermentation technology in fermentation-pervaporation separation coupling; the material consumption of cell culture is lowered, the cell concentration in the fermentation process is improved, the fermentation efficiency and the product concentration are improved.

The present invention provides, in various embodiments, hybrid single-pass tangential flow filtration assemblies, disposable single-pass tangential flow filtration assemblies, scalable single-pass tangential flow filtration assemblies and adaptable modular single-pass tangential flow filtration assemblies. In other embodiments, the invention relates to processes for recovering proteins from the surface of a filtration membrane in a single-pass tangential flow filtration assembly and for cleaning a tangential flow filtration assembly. In additional embodiments, the invention provides methods of increasing the processing capacity of a single-pass tangential flow filtration assembly.

The invention provides a method for preventing and controlling balsam pear drosophila melanogaster by using a photosynthetic high-fat film agent. The photosynthetic high-fat film agent is included, and is prepared from, by weight, 150 parts of a dodecyl alcohol, 150 parts of a cetyl alcohol, 30 parts of a repellent, 8 parts of an emulsifier, 3 parts of a co-emulsifier, 40 parts of a thickener and800 parts of water; after being diluted with water by using the photosynthetic high-fat film agent, balsam pears are sprayed. The method can effectively reduce the invasion of the drosophila melanogaster, the time for the repellent to remain on the balsam pears can achieve a sustained effect, and the effect of preventing the drosophila melanogaster is increased.

Provided is a filtration method for the step of removing viruses in a process of producing a protein preparation during which an intermediate protein preparation with a high protein concentration flows at high pressure to a virus removal filter. The filtration method employs a virus removal filter which has a close fitting nozzle of which the inlet at least has a pressure resistance of 600 kPa or more, and an effective area of the virus removal membrane of at least 0.0001 m2 and no more than 0.03 m2. An intermediate protein preparation with the protein concentration raised to at least 20 mg / ml and no more than 100 mg / ml by means of a purification process flows down to said virus removal filter under conditions in which the inlet pressure of the intermediate protein preparation is at least 150 kPa and no more than 600 kPa, the average protein filtration speed is at least 1.0 kg / m2 / hr, and the filtration time is at least 1 hour and no more than 5 hours, to give an intermediate protein preparation filtrate with a viral removal rate (LRV) of ≧3.

The invention belongs to the technical field of lithium ion batteries, and discloses a preparation method and application of a flexible self-supporting silicon / carbon nanotube film composite electrode. The invention utilizes a floating catalytic chemical vapor deposition method to prepare a continuous carbon nanotube film. The modified silicon powder floats on the water surface, and the cylindrical carbon nanotube continuum is collected through the water by rolling the roller. In this state, the carbon nanotube continuum has a large surface area, its own adsorption and the cylindrical carbon nanotube continuum. The volume of the body shrinks sharply when it encounters water. The silicon powder floating on the water surface is evenly and tightly wrapped in it. film, and finally rolled to obtain a flexible silicon-carbon nanotube composite electrode film material. Compared with the prior art, this method has a higher silicon load, and the silicon is more uniformly distributed in the carbon tube film, which is beneficial to the improvement of the specific capacity and cycle performance of the assembled lithium-silicon battery.