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Dry cleaning with CO2

Discussion in 'Classic Menswear' started by bushd841, Aug 28, 2006.

  1. bushd841

    bushd841 Member

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    I've been reading about dry cleaning with CO2; has anyone experiened this? What was your opinion - did it work as well as conventional methods?
     


  2. Huntsman

    Huntsman Senior member

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    What, do they use supercritical CO2? If so, I expect it would be very thorough on any polar or low-molecular weight contaminates due to a combination of high density, high diffusion coefficient, and low viscosity, on par with a gas. I would wonder about its ability to deal with high molecular weight non polar substances, such as certain fats and oils.

    I'd prefer it and give it a shot at least if I could.

    Regards,
    Huntsman
     


  3. Artisan Fan

    Artisan Fan Suitsupply-sider

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    I'm curious about this as well...
     


  4. grimslade

    grimslade Senior member

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    What, do they use supercritical CO2? If so, I expect it would be very thorough on any polar or low-molecular weight contaminates due to a combination of high density, high diffusion coefficient, and low viscosity, on par with a gas. I would wonder about its ability to deal with high molecular weight non polar substances, such as certain fats and oils.

    I'd prefer it and give it a shot at least if I could.

    Regards,
    Huntsman



    You know, it's funny, but when I read the OP, I had exactly the same reaction!

    [​IMG]
     


  5. CaptChaos

    CaptChaos Senior member

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    I had some pants cleaned with CO2 a couple years ago and they turned out fine. They were not heavily stained with grease or oil so I can't say how it would work on those materials.

    Unfortunately, that chain of cleaners went bankrupt and there are no CO2 cleaners in Vancouver anymore.
     


  6. GQgeek

    GQgeek Senior member

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    I would wonder about its ability to deal with high molecular weight non polar substances, such as certain fats and oils.

    I'd prefer it and give it a shot at least if I could.

    Regards,
    Huntsman


    They actually use liquid CO2. And it's the other way around, CO2 works very well for nonpolar substances and is similar in effectiveness to hexane. Remember, it's nonpolar despite the two oxygens.

    And regarding the OP, the biggest benefit of CO2 cleaning imo is the lack of heat in the process.
     


  7. bushd841

    bushd841 Member

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    I'm unfamiliar with the "Supercritical" CO2 mentioned by Huntsman. I've just read a few bits and pieces about it through different sources. An online search showed that Consumer Reports thought it did a better job than the standard method and without any cancer causing chemicals in the process.
    I live in Tampa and am seeking cleaners that use this process. Just thought I'd ask for some feedback first.
    Thanks to all. [​IMG]
     


  8. Aus_MD

    Aus_MD Senior member

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    They actually use liquid CO2. And it's the other way around, CO2 works very well for nonpolar substances and is similar in effectiveness to hexane. Remember, it's nonpolar despite the two oxygens.

    And regarding the OP, the biggest benefit of CO2 cleaning imo is the lack of heat in the process.



    You are correct that liquid CO2 is "used", but only in the sense that it is pressurized into the supercritical region. In other words the cleaning uses supercritical CO2 as a solvent.

    Aus
     


  9. GQgeek

    GQgeek Senior member

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    You are correct that liquid CO2 is "used", but only in the sense that it is pressurized into the supercritical region. In other words the cleaning uses supercritical CO2 as a solvent.

    Aus


    I understand the difference but I never really looked in to how the machines work and am actually a little surprised that the cleaners don't advertise it as such. Supercritical CO2 sounds so much cooler than liquid CO2 from a marketing perspective.
     


  10. Huntsman

    Huntsman Senior member

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    They actually use liquid CO2. And it's the other way around, CO2 works very well for nonpolar substances and is similar in effectiveness to hexane. Remember, it's nonpolar despite the two oxygens.

    And regarding the OP, the biggest benefit of CO2 cleaning imo is the lack of heat in the process.


    You're right, all right. I know that, too, dunno why I wrote it reversed -- chemical dyslexia. I considered using it once because of its selectivity and high diffusion coefficient. Needed to dissolve some paraffin and leave other stuff behind.

    I think they mightn't use 'supercritical' as it sounds quite dangerous. Then you'd have hordes of people trying to close those explosive drycleaners.[​IMG] Dihydrogen monoxide, anyone?

    Regards,
    Huntsman
     


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