NO892781L - SEMI-PERMEABLE MEMBRANES WITH AN INTERNAL DISCRIMINATION AREA. - Google Patents
SEMI-PERMEABLE MEMBRANES WITH AN INTERNAL DISCRIMINATION AREA.Info
- Publication number
- NO892781L NO892781L NO89892781A NO892781A NO892781L NO 892781 L NO892781 L NO 892781L NO 89892781 A NO89892781 A NO 89892781A NO 892781 A NO892781 A NO 892781A NO 892781 L NO892781 L NO 892781L
- Authority
- NO
- Norway
- Prior art keywords
- solvent
- bisphenol
- membrane
- polycarbonate
- semi
- Prior art date
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Oppfinnelsen er en semi-permeabel membran son omfatter en polymer matriks sed to porøse overflater og et område som virker slik at det separerer én eller flere gasser fra én eller flere andre gasser. Det er beskrevet en blanding som kan anvendes til fremstilling av en bisfenol-basert polykarbonat-membran hvor minst 25 vekt%'av bisfenolgruppene er tetra-balogenert, fortrinnsvis med Cl eller Br.landingen omfatter (i) et bisfenol-basert polykarbonat hvor minst 25 vekt* av bisfenolgruppene er tetrahalogenert, hvor halogenet er Cl eller Br, (ii) et løsemiddel for et slikt polykarbonat, og (iii)et ikke-løsemiddel for et slikt polykarbonat. Oet er beskrevet en fremgangsmåte hvor blandingen oppvarmes og ekstruderes til en form som egner seg til membran-anvendelse såsom en hul fiber. Den dannede membranen føres deretter gjennom en bråkjølingssone hvor blandingen gjennom faseseparasjon, og løsemidlet/ikke-løsemidlet fjernes og det dannes et diskriminerende område som har evne til å separere oksygen fra nitrogen. Membranene ifølge denne oppfinnelse viser seg å ha utmerkede separasjons-faktorer og fluks. Slike membraner har mindre tendens til å bli ødelagt ved håndtering og ved å utsettes for forurensninger, på grunn av det indre område som påvirker separasjonen, da de porøse overflatene virker slik at de beskytter dette område.The invention is a semi-permeable membrane comprising a polymeric matrix having two porous surfaces and a region which acts to separate one or more gases from one or more other gases. A composition can be described which can be used for the preparation of a bisphenol-based polycarbonate membrane in which at least 25% by weight of the bisphenol groups are tetrabalogenated, preferably with Cl or Br. The landing comprises (i) a bisphenol-based polycarbonate in which at least 25% weight * of the bisphenol groups are tetrahalogenated, where the halogen is Cl or Br, (ii) a solvent for such a polycarbonate, and (iii) a non-solvent for such a polycarbonate. A process is described in which the mixture is heated and extruded into a mold suitable for membrane use such as a hollow fiber. The formed membrane is then passed through a quench zone where the mixture through phase separation, and the solvent / non-solvent is removed and a discriminating region is formed which has the ability to separate oxygen from nitrogen. The membranes of this invention are found to have excellent separation factors and flux. Such membranes are less likely to be damaged by handling and by exposure to contaminants, due to the inner area affecting the separation, as the porous surfaces act to protect this area.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/118,119 US4772392A (en) | 1987-11-06 | 1987-11-06 | Process for preparing POWADIR membranes from tetrahalobisphenol A polycarbonates |
| US07/118,141 US4962131A (en) | 1987-11-06 | 1987-11-06 | Composition useful in process for preparing powadir membranes from tetrahalobisphenol a polycarbonates |
| US07/129,273 US4838904A (en) | 1987-12-07 | 1987-12-07 | Semi-permeable membranes with an internal discriminating region |
| PCT/US1988/003164 WO1989004206A1 (en) | 1987-11-06 | 1988-09-14 | Semi-permeable membranes with an internal discriminating region |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO892781D0 NO892781D0 (en) | 1989-07-05 |
| NO892781L true NO892781L (en) | 1989-09-05 |
Family
ID=27492185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO89892781A NO892781L (en) | 1987-11-06 | 1989-07-05 | SEMI-PERMEABLE MEMBRANES WITH AN INTERNAL DISCRIMINATION AREA. |
Country Status (1)
| Country | Link |
|---|---|
| NO (1) | NO892781L (en) |
-
1989
- 1989-07-05 NO NO89892781A patent/NO892781L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO892781D0 (en) | 1989-07-05 |
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