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公开(公告)号：US20170348650A1
公开(公告)日：2017-12-07
申请号：US15544342
申请日：2016-01-19
发明人： Yuzo KAYAMA , Masayasu KOMURO , Mitsugu SHIRAISHI
CPC分类号： B01D71/68 , B01D69/02 , B01D69/08 , B01D2323/02 , B01D2325/022 , B01D2325/04 , B01D2325/36 , C07K1/34
摘要： The present invention provides a porous hollow fiber filtration membrane comprising a polysulfone-based polymer and hydrophilic polymer, the porous hollow fiber filtration membrane including a gradient asymmetric structure in which the average pore diameter of fine pores increases from the outer surface toward the inner surface, a content of the hydrophilic polymer in the membrane is 6.0 to 12.0% by mass, and a ratio of the content of the hydrophilic polymer in the outer surface to the content of the hydrophilic polymer in the membrane is 1.20 to 1.60.
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公开(公告)号：US20170304780A1
公开(公告)日：2017-10-26
申请号：US15523513
申请日：2015-11-04
发明人： Masayasu KOMURO , Mitsugu SHIRAISHI , Yuzo KAYAMA
CPC分类号： B01D71/68 , B01D67/0016 , B01D67/0095 , B01D69/02 , B01D69/08 , B01D69/087 , B01D2323/08 , B01D2323/10 , B01D2323/18 , B01D2323/20 , B01D2325/023 , B01D2325/36 , D01F6/76
摘要： A hollow fiber filtration membrane in which even when a relatively small contaminant having a size close to that of a permeation effective component is present in a filtration solution, Flux decrease over time during filtration is suppressed, and a useful component can be efficiently recovered, the hollow fiber filtration membrane including a polysulfone-based polymer and a hydrophilic polymer and having a large number of pores, the hollow fiber filtration membrane having a gradient asymmetric porous structure in which an average pore diameter of the pores increases from an outer surface portion toward an inner surface portion of the membrane, a content of the hydrophilic polymer of the membrane being from 6.0 to 10.0% by mass, a ratio between a content of the hydrophilic polymer at the inner surface portion and the content of the hydrophilic polymer of the membrane being in the range of from 0.50 to 0.80.
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公开(公告)号：US20210197133A1
公开(公告)日：2021-07-01
申请号：US17204203
申请日：2021-03-17
发明人： Yuzo KAYAMA , Masayasu KOMURO , Tetsuya HAMASAKI
IPC分类号： B01D69/08 , B01D71/68 , B01D69/00 , B01D67/00 , B01D69/02 , B01D71/34 , B01D69/06 , B01D71/28
摘要： A porous membrane containing a hydrophobic polymer and a water-insoluble hydrophilic polymer, the porous membrane having a dense layer in the downstream portion of filtration in the membrane, having a gradient asymmetric structure in which the average pore diameter of fine pores increases from the downstream portion of filtration toward the upstream portion of filtration, and having a gradient index of the average pore diameter from the dense layer to the coarse layer of 0.5 to 12.0.
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公开(公告)号：US20170361285A1
公开(公告)日：2017-12-21
申请号：US15543717
申请日：2015-10-09
发明人： Yuzo KAYAMA , Masayasu KOMURO
CPC分类号： B01D71/68 , B01D67/0016 , B01D69/02 , B01D69/08 , B01D2323/22 , B01D2325/023 , B01D2325/04 , B01D2325/20 , B01D2325/36 , C07K1/34 , C08L81/06
摘要： The present invention provides a porous hollow fiber membrane including a polysulfone-based polymer and a hydrophilic polymer, and having a dense layer in a section from an outer surface portion to a center region of a membrane thickness, a thickness of the dense layer being 10 to 30 μm, and a ratio of a pore having a pore size of more than 50 nm and a ratio of a pore having a pore size of 10 nm or smaller in the dense layer being 25 to 40% and 20% or less, respectively.
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公开(公告)号：US20170266626A1
公开(公告)日：2017-09-21
申请号：US15506521
申请日：2015-08-25
发明人： Yuzo KAYAMA , Masayasu KOMURO , Tetsuya HAMASAKI
CPC分类号： B01D69/08 , B01D67/0009 , B01D67/003 , B01D67/0088 , B01D69/00 , B01D69/02 , B01D69/06 , B01D71/06 , B01D71/28 , B01D71/34 , B01D71/68 , B01D2323/02 , B01D2323/06 , B01D2323/22 , B01D2325/02 , B01D2325/20 , B01D2325/36 , C08J2201/0464
摘要： The object of the present invention is to provide a porous membrane by which a useful component can be recovered while suppressing the clogging during filtration of a protein solution and from which only a small amount of an eluate is eluted even when an aqueous solution is filtered.The present invention provides a porous membrane containing a hydrophobic polymer and a water-insoluble hydrophilic polymer, the porous membrane having a dense layer in the downstream portion of filtration in the membrane, having a gradient asymmetric structure in which the average pore diameter of fine pores increases from the downstream portion of filtration toward the upstream portion of filtration, and having a gradient index of the average pore diameter from the dense layer to the coarse layer of 0.5 to 12.0.
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