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Porous hollow fibre membrane, its manufacturing method and use, porous hollow fibre membrane block and its use

A manufacturing method and porous technology, which can be used in hollow filament manufacturing, rayon manufacturing, chemical instruments and methods, etc., can solve the problems of inability to improve water quality, low proportion of hollow fiber membrane filtration, and increased equipment costs.

Inactive Publication Date: 2006-10-18
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in this method, for the whole storage water, the ratio of the filtering capacity of the hollow fiber membrane is low, and the water quality cannot be improved. However, the problem of high equipment cost may not necessarily lead to satisfactory results.

Method used

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  • Porous hollow fibre membrane, its manufacturing method and use, porous hollow fibre membrane block and its use
  • Porous hollow fibre membrane, its manufacturing method and use, porous hollow fibre membrane block and its use
  • Porous hollow fibre membrane, its manufacturing method and use, porous hollow fibre membrane block and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Manufactured in the following order, from polysulfone (UDEL-P1800, Amoco Japan Co., Ltd. PSF) 20% by weight, ethylene glycol (EG) 6% by weight, silicon oxide (average particle size 4.5μm) 18% by weight and A spinning dope composed of 54% by weight of N,N-dimethylacetamide (DMAc). That is, after dissolving ethylene glycol in N,N-dimethylacetamide, use a homogenizer to uniformly disperse silicon oxide powder in N,N-dimethylacetamide, and add Polysulfone was added, followed by stirring at 60° C. for 8 hours to dissolve the polysulfone and obtain a white slurry-like spinning dope in which silicon oxide was uniformly dispersed.

[0086] After degassing the spinning dope obtained by the above method, keep it at 50°C, and mix it with N,N-dimethylformamide ( An injection solution consisting of 80% by weight of DMF, 19% by weight of water, and 1% by weight of polyvinyl alcohol (PVA205, manufactured by Kuraray Co., Ltd., PVA) was sprayed together. This was run for 10 cm in a 50...

Embodiment 2

[0090] Except that the spinning dope is made of 20% by weight of polysulfone, 6% by weight of ethylene glycol, 20% by weight of silicon oxide (average particle size 11 μm), 2% by weight of silicon oxide (average particle size 4.5 μm), 52% by weight A hollow fiber membrane was obtained in the same manner as in Example 1 except that % N,N-dimethylacetamide was constituted. The resulting hollow fiber membrane has a pure water permeation rate of 520,000L / m 2 / hr / 100kPa, classified particle size is 5.0μm.

Embodiment 3

[0092] Except that the spinning dope is composed of 20% by weight of polysulfone, 4% by weight of ethylene glycol, 14% by weight of silicon oxide (average particle size 1.5 μm), and 62% by weight of N,N-dimethylformamide , and other hollow fiber membranes were obtained in the same manner as in Example 1. The resulting hollow fiber membrane has a pure water permeation rate of 39000L / m 2 / hr / 100kPa, classified particle size is 1.2μm.

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Abstract

Porous hollow fiber membrane with a graded particle size of 1 to 10 μm and a pure water permeation rate of 30,000 L / m 2 / hr / 100kPa. The manufacturing process includes (1) a stock solution composed of matrix polymers, additives, co-solvents and insoluble micropowder uniformly dispersed in the liquid with an average particle diameter of 1 to 20 μm, which constitute the material of the porous hollow fiber membrane, and In order to form the injection liquid of the hollow fiber, the process of forming the hollow fiber by the dry spinning method or the wet spinning method, and (2) immersing the spun hollow fiber in the insoluble matrix polymer to dissolve the fine powder extract In the process of removing fine powder.

Description

technical field [0001] The present invention relates to a porous hollow fiber membrane used for raw water filtration and its preparation method. Background technique [0002] In recent years, techniques for separation operations using separation membranes having permselectivity have remarkably progressed. It is practically used in the production process of ultrapure water, the production process of pharmaceuticals, the sterilization process of brewed products, and the production of drinking water. These uses are popularized due to demands such as refinement of water (advanced treatment), improvement of safety, and improvement of precision. Among various separation membranes, the hollow fiber membrane has a feature of reducing the space provided per unit membrane area. However, from the perspective of the entire separation system, the mainstream is still sand filtration. For example, for tap water and other manufacturing systems, the combination of coagulation sedimentation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/08B01D71/68B01D71/38B01D63/02B01D67/00B01D69/02C02F1/44D01D5/24D01D5/247D01F6/26
CPCB01D63/024B01D67/0011B01D67/003B01D69/02B01D69/08B01D71/68B01D2323/08B01D2323/12B01D2323/30B01D2325/20B01D2325/36C02F1/444D01D5/24D01D5/247D01F6/26B01D63/021
Inventor 小松贤作河田一郎石井重信佐藤芳雄中原清一
Owner KURARAY CO LTD