Choosing filter paper to extract an organic compound from HCl using gr

  1. May 25, 2014 #1
    Do I need to worry about the pore size, or can I just assume that any/all paper filter will remove the organic compound while letting the smaller HCl molecules through?

    The molecular weight of the organic compound is listed as "240"
     
  2. jcsd
  3. May 25, 2014 #2
    I don't know that plain old filter paper would work on a soluble component of a mixture. Typically if you want to filter something in solution, you need to use ultrafiltration techniques (which have limits to how small the pores can get AFAIK) or find a way to separate the unwanted component into a separate phase (for example precipitation).
     
  4. May 25, 2014 #3
    If the solute is ~100um uniform in size (solid outside of the HCl), shouldn't paper filters work? Would be sufficient to use a pore size of 50um, or should I use a smaller size?
     
  5. May 25, 2014 #4
    Sounds fine to me. If it were me, and I were working on an tested protocol, I'd check (qualitatively or quantitatively) the filtrate to get an idea of how well it worked.
     
  6. May 25, 2014 #5
    Thanks.

    Is normal filter paper sufficient to resist HCl or should I be buying special "hardened" and/or "ashless" filters?
     
  7. May 25, 2014 #6
    I'd imagine it depends on the concentration of HCl. Erring on the side if caution, you're best bet is likely to check with the manufacturer.
     
  8. May 25, 2014 #7
    Thanks, I will do that.
     
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