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Message | User | Date(yyyy-mm-dd) |
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Solvent Compatibility | barryhu | 2001-03-28 | Click here to register. |
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| I would like to use hollow fiber cartridge for liquid-liquid extraction and am concerned about the compatibility with organic solvents (hexane in particular). Even when the material of fiber and housing are compatible, we've had problem with the addhesives used to hold the fiber together and for sealing in the past. Do you have any product line that is fully compatible with hexane? I'm interested in cartridge with regenerated cellulose fiber. | | |
| lil stevie | 2001-03-29 | Click here to register. |
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 | Most of the Spectrum/Cellco/Microgon cartridges have polysulfolene bodies and the fibers are held in place with a 2-part urethane adhesive. Both the cartridge body and the adhesive should not be bothered by hexane.
I'm not sure that the regenerated cellulose fibers would be a good choice for use with hexane, generally a polar solvent is required to keep the cellulose wet. You'd probably be better off with a polysulfone-type membrane. |
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| barryhu | 2001-03-30 | Click here to register. |
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| Thanks. I will use aqueous solution at one side of the membrane and organic solution at the other side of the membrane so the cellulose will be wetted by the aqueous phase. By applying a higher pressure at the organic side, aqueous phase will not penetrate the membrane and a stable interface can be maintained. Is polysulfone membrane hydrophobic? I thought it's hydrophilic, just like cellulose. Any way, I need hydrophilic membrane that is readily wetted by aquoeus solution. We've tried some of spectrum's PES and ME membrane but they are not particularly hydrophyllic. |
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| lil stevie | 2001-04-02 | Click here to register. |
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| The Mixed Ester and PolyEtherSolufone membranes are more hydrophillic than the polysulfone membranes, although either the PES or PS should work for you in your application. I would worry that the cellulose membranes (ME) that are hydrophyllic would dry and/or crack when exposed to the hexane. |
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