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Thread: Simple Distillation : Why must the the top of the receiver be open? (expose to air)

  1. #1 Simple Distillation : Why must the the top of the receiver be open? (expose to air) 
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    Hi, in Simple Distillation, why must the receiver ( of distillate) be open as in expose to air?
    Is there any reason for this?

    Thank you


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  3. #2  
    Forum Ph.D.
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    simply to conduct the distillation at atmospheric pressure, you can do vacuum distillation to lower the bp of components also.


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    Quote Originally Posted by fizzlooney View Post
    simply to conduct the distillation at atmospheric pressure, you can do vacuum distillation to lower the bp of components also.
    Oh, but is there a reason to conduct the distillation at atmospheric pressure? how would that affect the process?
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  5. #4  
    Forum Isotope Bunbury's Avatar
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    Quote Originally Posted by Mphisto View Post
    Quote Originally Posted by fizzlooney View Post
    simply to conduct the distillation at atmospheric pressure, you can do vacuum distillation to lower the bp of components also.
    Oh, but is there a reason to conduct the distillation at atmospheric pressure? how would that affect the process?
    The receiver is vented to relieve the build up of pressure that would otherwise force the seals between glass components apart. Then the system would leak, resulting in little to no liquid being collected.
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    I don't understand the "build up of pressure" part, where is the pressure coming from? Sorry man, if I am being too talkative on such a small issue
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    Brassica oleracea Strange's Avatar
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    Quote Originally Posted by Mphisto View Post
    I don't understand the "build up of pressure" part, where is the pressure coming from? Sorry man, if I am being too talkative on such a small issue
    You are heating it and turning some of the liquid to gas. If this was done in a sealed container, the pressure would rise.
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  8. #7  
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    Quote Originally Posted by Strange View Post
    Quote Originally Posted by Mphisto View Post
    I don't understand the "build up of pressure" part, where is the pressure coming from? Sorry man, if I am being too talkative on such a small issue
    You are heating it and turning some of the liquid to gas. If this was done in a sealed container, the pressure would rise.
    Oh I understand now. Will there be some cases where the glass tube sealed connecting to the receiver break? (Due to extreme pressure)

    Thank you
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  9. #8  
    Brassica oleracea Strange's Avatar
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    Quote Originally Posted by Mphisto View Post
    Quote Originally Posted by Strange View Post
    Quote Originally Posted by Mphisto View Post
    I don't understand the "build up of pressure" part, where is the pressure coming from? Sorry man, if I am being too talkative on such a small issue
    You are heating it and turning some of the liquid to gas. If this was done in a sealed container, the pressure would rise.
    Oh I understand now. Will there be some cases where the glass tube sealed connecting to the receiver break? (Due to extreme pressure)

    Thank you
    No, because there will always be a way for the pressure to escape (as you said in your first post).
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  10. #9  
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    Ok, I get it now, thank you!
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