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1. WO2020136560 - ASYMMETRIC HOLLOW FIBER MEMBRANES AND METHODS OF MAKING AND USING THE SAME

Publication Number WO/2020/136560
Publication Date 02.07.2020
International Application No. PCT/IB2019/061299
International Filing Date 23.12.2019
IPC
B01D 69/08 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
69Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
08Hollow fibre membranes
B01D 71/26 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
71Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
06Organic material
26Polyalkenes
B01D 61/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
61Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
B01D 67/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
67Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
B01D 19/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
19Degasification of liquids
B01D 53/22 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
22by diffusion
CPC
B01D 2256/10
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2256Main component in the product gas stream after treatment
10Nitrogen
B01D 2256/245
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2256Main component in the product gas stream after treatment
24Hydrocarbons
245Methane
B01D 2257/7025
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2257Components to be removed
70Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
702Hydrocarbons
7022Aliphatic hydrocarbons
7025Methane
B01D 2325/04
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2325Details relating to properties of membranes
04Characteristic thickness
B01D 53/228
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
22by diffusion
228characterised by specific membranes
B01D 67/0025
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
67Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
0002Organic membrane formation
0023by inducing porosity into non porous precursor membranes
0025by mechanical treatment, e.g. pore-stretching
Applicants
  • 3M INNOVATIVE PROPERTIES COMPANY [US]/[US]
Inventors
  • LIN, Kuan-Yin
  • DELOZIER, James C.
  • MCCORMICK, Mark
  • MERCELAT, Aurore Y.J.
  • ZHOU, Jinsheng
Agents
  • BAKER, James A.,
  • NOWAK, Sandra K.,
  • MAKI, Eloise J.,
  • BLANK, Colene H.,
  • LEVINSON, Eric D.,
  • RINGSRED, Ted K.,
  • FLORCZAK, Yen Tong,
Priority Data
62/785,61227.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ASYMMETRIC HOLLOW FIBER MEMBRANES AND METHODS OF MAKING AND USING THE SAME
(FR) MEMBRANES À FIBRES CREUSES ASYMÉTRIQUES ET LEURS PROCÉDÉS DE FABRICATION ET D'UTILISATION
Abstract
(EN)
Asymmetric hollow fiber membranes, membrane contactors, and related production and use methods. The asymmetric hollow fiber membranes include a porous substrate having a multiplicity of pores, the porous substrate including at least a first semi-crystalline thermoplastic polyolefin copolymer derived by polymerizing at most 3 wt. % of linear or branched alpha olefin monomers with at least 97 wt. % of 4-methyl-1-pentene monomer. The asymmetric hollow fiber membranes also include a skin layer overlaying the porous substrate, the skin layer including a second semi -crystalline thermoplastic polyolefin copolymer derived by polymerizing at least 2 wt. % of linear or branched alpha olefin monomers with at most 98 wt. % of 4-methyl-1-pentene monomer. The skin layer is less porous than the porous substrate and forms an outer surface of the asymmetric hollow fiber membrane, while the porous substrate forms an inner surface of the hollow fiber membrane. The skin layer is preferably nonporous.
(FR)
L'invention concerne des membranes à fibres creuses asymétriques, des contacteurs à membrane, et des procédés de production et d'utilisation associés. Les membranes à fibres creuses asymétriques comprennent un substrat poreux ayant une multiplicité de pores, le substrat poreux comprenant au moins un premier copolymère de polyoléfine thermoplastique semi-cristallin issu de la polymérisation d'au plus 3% en poids de monomères d'alpha-oléfine linéaires ou ramifiés avec au moins 97% en poids de monomère 4-méthyl-1-pentène. Les membranes à fibres creuses asymétriques comprennent également une couche de peau recouvrant le substrat poreux, la couche de peau comprenant un second copolymère de polyoléfine thermoplastique semi-cristallin issu de la polymérisation d'au moins 2% en poids de monomères d'alpha-oléfine linéaires ou ramifiés avec au plus 98% en poids de monomère de 4-méthyl-1-pentène. La couche de peau est moins poreuse que le substrat poreux et forme une surface externe de la membrane à fibres creuses asymétrique, tandis que le substrat poreux forme une surface interne de la membrane à fibres creuses. La couche de peau est de préférence non poreuse.
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