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Message Icon Topic: I looking for membrane o filter Post Reply Post New Topic
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feba
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Quote feba Replybullet Topic: I looking for membrane o filter
    Posted: 17 June 2004 at 10:12am

PLEASE RECOMMEND ME A FILTER OR MEMBRANE WITH THE FOLLOWING  CHARACTERISTIC: 
THAT IT ALLOWS THE FREE  (WITHOUT PRESSURE) FLOW OF WATER 
THAT IT DOESN'T ALLOW THE FLOW TOTALLY OF A LIQUID  WITH A MOLECULAR SIZE 7 TIMES SUPERIOR TO THAT OF THE WATER .

THANKS.

feba
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Keparick
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Quote Keparick Replybullet Posted: 02 October 2004 at 10:06am

Hello!

In my opinion, there are no membranes for your requirements. The molecular size of water is about some angstroms. Therefore, total retention of other liquid needs a membrane with pores about a nonometer in size. There are a high pressure (about from tens to hundreds atmospheres) requires for flow the water through these pores.

Nevertheless, it is probably possible with use the different adsorbents which reject the other molecules from solution depend on chemical nature of last.

 

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ntcj1982
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Quote ntcj1982 Replybullet Posted: 08 May 2007 at 3:38am

We are an chinese firm specilized in provideing microporous membrane products, technologies and services. We meet filtering needs of customers in a number of different industries, including the biosciences, industrial processing, laboratory testing, food & beverage, electronics and water treatment.
    There are a lot of products in our company .The brand name of our product is named “membrane-solutions” just for  English. We carry quite  a bit range of miro-filtration membrane, includes PP, Nylon, PVDF, PES and CN-CA, with different pore size .

   With Best Regards,

    Jason

TEL:    86-21-61478115-817

e-mail:jason@membrane-solutions.com

web:    www.membrane-solutions.com

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sagebob
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Quote sagebob Replybullet Posted: 08 May 2007 at 9:37am
Howdy Feba,

Molecular sieves sounds like a possibility to separate small molecules from large ones.
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febausa
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Quote febausa Replybullet Posted: 19 June 2007 at 12:55pm
Hi,

PLEASE RECOMMEND ME A FILTER CARTRIDGES WITH THE FOLLOWING CHARACTERISTIC:
1- ONE SIDE THAT IT ALLOWS WITHOUT PRESSURE FLOW OF WATER; AND
2- THE OPOSSITE SIDE CONTENT perfluorooctane CAS No: 307-34-6, with follow properties:

Molecular Formula CF3(CF2)6CF3
Molecular Weight 438.06
Density (g cm-3): 1.73
Water solubility: insoluble

Thanks and best regards,
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