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1. 发明授权

US11247180B2 Method, spinneret and system for fabricating multilayer membranes 有权
公开(公告)号：US11247180B2
公开(公告)日：2022-02-15
申请号：US16086941
申请日：2017-03-20
申请人： DUPONT SAFETY & CONSTRUCTION, INC.
发明人： Menno Bos , Martin Heijnen , Natalia Widjojo
IPC分类号： B01D69/08 , B01D69/02 , B01D69/12 , B01D71/68 , B01D61/14
摘要： The present invention is related to a method for fabricating multilayer singlebore membranes (10) or multilayer multibore membranes (20) for ultrafiltration applications including the following method steps: (a) feeding at least a material of a substrate (12), at least one material of a functional layer (14, 15) and a bore fluid (36) to a spinneret (30) simultaneously; (b) forming said membranes (10, 20) as a tube-like string (54) in a one-step process in said spinneret (30); (c) thereby assigning a functionality to said functional layer (14, 15) applied on at least one surface (13, 17) of said substrate (12). The invention is also related to a spinneret (30) for fabricating multilayer singlebore membranes (10) or multilayer multibore membranes (20), using the inventive method, and to a system comprising such a spinneret (30).

2. 发明申请

US20210178342A1 REMOVING METAL IONS WITH A MEMBRANE BASED ON ANIONIC POLYARYLENE ETHERSULFONE AND A CATIONIC POLYMER WITH AMINO GROUPS 有权
公开(公告)号：US20210178342A1
公开(公告)日：2021-06-17
申请号：US16770823
申请日：2018-12-03
申请人： DuPont Safety & Construction, Inc.
发明人： Oliver Gronwald , Martin Weber , Martin Heijnen
IPC分类号： B01D71/82 , B01J41/13 , B01J41/05 , B01J39/05 , B01J39/19 , B01J39/20 , B01J47/12 , B01J49/20 , B01J49/53 , B01J49/57 , B01D61/14 , B01D71/68 , B01D71/60 , B01D69/02 , B01D65/02 , C02F1/44 , C02F1/42
摘要： The present invention relates to a method for removing metal ions from an aqueous system comprising a step of filtering the aqueous system through a loaded membrane which contains a carrier membrane based on a polyarylene ethersulfone which carries anionic groups, and a cationic polymer which is a polymer comprising primary and/or secondary amino groups. The invention further relates to a loaded membrane which contains a carrier membrane based on a polyarylene ethersulfone which carries anionic groups, and a cationic polymer which is a polymer comprising primary and/or secondary amino groups.

3. 发明授权

US11904280B2 Filtration system and method for filtering water 有权
公开(公告)号：US11904280B2
公开(公告)日：2024-02-20
申请号：US17056196
申请日：2019-05-29
申请人： DuPont Safety & Construction, Inc.
发明人： Martin Heijnen
IPC分类号： B01D63/04 , B01D61/18 , C02F1/44
CPC分类号： B01D63/046 , B01D61/18 , C02F1/444 , B01D2313/04 , B01D2313/125 , B01D2313/20 , B01D2313/243 , B01D2313/44 , B01D2313/54 , B01D2315/06 , B01D2315/08 , B01D2317/04 , B01D2317/06
摘要： The invention relates to filtration system (20), comprising a tank (40) filled at least partly with water to be filtered, and at least one filtration module (30), the at least one filtration module (30) comprising at least one filter membrane (10) for filtering the water comprising a substrate (12) which is penetrated by at least one capillary (16), and at least one filtrate pipe (32) for drawing filtered water out of the tank (40), whereat the at least one filtration module (30) is arranged in the tank (40) such that the at least one filter membrane (10) is submerged at least partly in the water to be filtered. The at least one filtration module (30) is designed and arranged such that water to be filtered flows into the at least one capillary (16) and from the at least one capillary (16) through the substrate (12) into the filtrate pipe (32). The invention also relates to a method for filtering water by means of a filtration system (20) according to the invention, whereat the water to be filtered is drawn into the at least one capillary (16) and from the at least one capillary (16) through the substrate (12) into the filtrate pipe (32) and from the filtrate pipe (32) out of the tank (40).

4. 发明授权

US11117817B2 Removing metal ions from aqueous systems with an active layer membrane 有权
公开(公告)号：US11117817B2
公开(公告)日：2021-09-14
申请号：US16477368
申请日：2017-12-20
申请人： DUPONT SAFETY & CONSTRUCTION, INC.
发明人： Claudia Staudt , Peter Berg , Martin Heijnen , Natalia Widjojo , Jia Le Low , Marc Rudolf Jung
IPC分类号： C02F1/44 , B01D69/02 , B01D69/08 , B01D71/60 , B01D71/68 , B01D67/00 , B01D69/12 , B01D71/56 , B01D61/14 , C02F101/20 , C02F103/08
摘要： A process for removing metal ions from aqueous systems is disclosed comprising the treatment of the aqueous system with a membrane M, wherein the membrane M has a molecular weight cut-off above 3,000 Da and comprises A.) a carrier membrane CM, wherein said carrier membrane CM has a porous structure wherein the average pore diameter on one surface is smaller than in the rest of the membrane, thus forming rejection layers R on one side of carrier membrane CM, and B.) an active layer A comprising at least one polymer P comprising a plurality of functional groups G capable of forming stable complexes with metal ions selected from Ca, Mg, Al, Cu, Ni, Pb, Zn, Sb, Co, Cr, Cd, Hg and/or Ag, wherein said active layer A is located on the surfaces of the rejection layers R of carrier membrane CM and throughout the porous structure of carrier membrane CM.

5. 发明申请

US20210213388A1 FILTRATION SYSTEM AND METHOD FOR FILTERING WATER 有权
公开(公告)号：US20210213388A1
公开(公告)日：2021-07-15
申请号：US17056196
申请日：2019-05-29
申请人： DuPont Safety & Construction, Inc.
发明人： Martin Heijnen
IPC分类号： B01D63/04 , B01D61/18 , C02F1/44
摘要： The invention relates to filtration system (20), comprising a tank (40) filled at least partly with water to be filtered, and at least one filtration module (30), the at least one filtration module (30) comprising at least one filter membrane (10) for filtering the water comprising a substrate (12) which is penetrated by at least one capillary (16), and at least one filtrate pipe (32) for drawing filtered water out of the tank (40), whereat the at least one filtration module (30) is arranged in the tank (40) such that the at least one filter membrane (10) is submerged at least partly in the water to be filtered. The at least one filtration module (30) is designed and arranged such that water to be filtered flows into the at least one capillary (16) and from the at least one capillary (16) through the substrate (12) into the filtrate pipe (32). The invention also relates to a method for filtering water by means of a filtration system (20) according to the invention, whereat the water to be filtered is drawn into the at least one capillary (16) and from the at least one capillary (16) through the substrate (12) into the filtrate pipe (32) and from the filtrate pipe (32) out of the tank (40).

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