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1. (WO2019005656) POLYAMIDE FLAT SHEET MEMBRANES WITH MICROPOROUS SURFACE STRUCTURE FOR NANOPARTICLE RETENTION
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Pub. No.: WO/2019/005656 International Application No.: PCT/US2018/039251
Publication Date: 03.01.2019 International Filing Date: 25.06.2018
IPC:
B01D 67/00 (2006.01) ,B01D 69/02 (2006.01) ,B01D 69/06 (2006.01) ,B01D 71/56 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
67
Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
69
Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
02
characterised by their properties
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
69
Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
06
Flat membranes
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
71
Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
06
Organic material
56
Polyamides, e.g. polyester-amides
Applicants:
3M INNOVATIVE PROPERTIES COMPANY [US/US]; 3M Center Post Office Box 33427 Saint Paul, MN 55133-3427, US
Inventors:
MALEK, Daniel; DE
STRIPP, Walter; DE
CZERNIK, Martin; DE
OSTERLOH, Ramona; DE
SCHNEIDER, Frank; DE
Agent:
BAUM, Scott, A.; US
BLANK, Colene, H.,; US
HARTS, Dean, M.; US
LEVINSON, Eric, D.; US
MAKI, Eloise, J.; US
NOWAK, Sandra, K.; US
OLSON, Peter, L.; US
RHODES, Kevin, H.; US
RINGSRED, Ted, K.; US
Priority Data:
17178506.628.06.2017EP
Title (EN) POLYAMIDE FLAT SHEET MEMBRANES WITH MICROPOROUS SURFACE STRUCTURE FOR NANOPARTICLE RETENTION
(FR) MEMBRANES STRATIFIÉES PLANES EN POLYAMIDE DOTÉES DE STRUCTURE DE SURFACE MICROPOREUSE POUR LA RÉTENTION DE NANOPARTICULES
Abstract:
(EN) The present disclosure provides a flat-sheet polyamide membrane comprising a first major surface and a second major surface and a separation layer and a porous substructure in the cross section of the membrane between the first major and the second major surface, wherein the average pore size diameter in the separation layer is smaller than the average pore size diameters on the first and second major surfaces, wherein the average pore size diameter on the first major surface is larger than the average pore size diameter on the second major surface, wherein the separation layer is closer to the second major surface than to the first major surface. The present disclosure further provides a method for producing such membranes and a use of the membranes for nanofiltration or ultrafiltration purposes.
(FR) La présente invention concerne une membrane stratifiée plane en polyamide comprenant une première surface principale et une seconde surface principale et une couche de séparation et une sous-structure poreuse dans la section transversale de la membrane entre la première surface principale et la seconde surface principale, le diamètre moyen des pores dans la couche de séparation étant inférieur aux diamètres moyens des pores sur les première et seconde surfaces principales, le diamètre moyen des pores sur la première surface principale étant supérieur au diamètre moyen des pores sur la seconde surface principale, la couche de séparation étant plus proche de la seconde surface principale que de la première surface principale. La présente invention concerne en outre un procédé de production desdites membranes et une utilisation des membranes à des fins de nanofiltration ou d'ultrafiltration.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)