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1. WO2011037706 - METHOD TO IMPROVE THE SELECTIVITY OF POLYBENZOXAZOLE MEMBRANES

Publication Number WO/2011/037706
Publication Date 31.03.2011
International Application No. PCT/US2010/045964
International Filing Date 19.08.2010
IPC
B01D 71/06 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
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 71/64 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
58Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
62Polycondensates having nitrogen-containing heterocyclic rings in the main chain
64Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors
C08G 73/22 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
73Macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen or carbon, not provided for in groups C08G12/-C08G71/238
06Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule; Polyhydrazides; Polyamide acids or similar polyimide precursors
22Polybenzoxazoles
CPC
B01D 2323/08
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2323Details relating to membrane preparation
08Specific temperatures applied
B01D 2325/20
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2325Details relating to properties of membranes
20Specific permeability or cut-off range
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 67/0093
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
0081After-treatment of organic or inorganic membranes
0093Chemical modification
B01D 71/62
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
58Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
62Polycondensates having nitrogen-containing heterocyclic rings in the main chain
Applicants
  • UOP LLC [US]/[US] (AllExceptUS)
  • LIU, Chunqing [CN]/[US] (UsOnly)
  • MINKOV, Raisa [US]/[US] (UsOnly)
  • TANG, Man-Wing [US]/[US] (UsOnly)
  • ZHOU, Lubo [US]/[US] (UsOnly)
  • BRICKER, Jeffery C. [US]/[US] (UsOnly)
Inventors
  • LIU, Chunqing
  • MINKOV, Raisa
  • TANG, Man-Wing
  • ZHOU, Lubo
  • BRICKER, Jeffery C.
Common Representative
  • UOP LLC
Priority Data
12/566,83425.09.2009US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD TO IMPROVE THE SELECTIVITY OF POLYBENZOXAZOLE MEMBRANES
(FR) PROCÉDÉ D'AMÉLIORATION DE LA SÉLECTIVITÉ DE MEMBRANES EN POLYBENZOXAZOLE
Abstract
(EN)
The present invention discloses a novel method to improve the selectivities of polybenzoxazole (PBO) membranes prepared from aromatic polyimide membranes for gas, vapor, and liquid separations. The PBO membranes that were prepared by thermal treating aromatic polyimide membranes containing between 0.05 and 20 wt-% of a poly(styrene sulfonic acid) polymer. These polymers showed up to 95% improvement in selectivity for CO2/CH4 and H2/CH4 separations compared to PBO membranes prepared from corresponding aromatic polyimide membranes without a poly(styrene sulfonic acid) polymer.
(FR)
La présente invention concerne un nouveau procédé d'amélioration des sélectivités de membranes en polybenzoxazole (PBO) préparées à partir de membranes en polyimide aromatique pour les séparations de gaz, de vapeurs et de liquides. Les membranes en PBO ont été préparées par traitement thermique de membranes en polyimide aromatique contenant de 0,05 à 20 % en poids d'un polymère de poly(acide styrène sulfonique). Ces polymères présentaient une amélioration de jusqu'à 95 % de la sélectivité pour les séparations CO2/CH4 et H2/CH4 comparé aux membranes en PBO préparées à partir des membranes en polyimide aromatique correspondantes sans polymère de poly(acide styrène sulfonique).
Latest bibliographic data on file with the International Bureau