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Vacuum Distillation


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#1 jeetu911

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Posted 11 October 2013 - 12:36 AM

Will there be any effect on reflux when we use vacuum distillation? (P=40 torr)


Edited by jeetu911, 12 October 2013 - 01:38 AM.


#2 S.R.Shah

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Posted 26 December 2013 - 06:35 AM

Please elaborate and describe your question with PFD

#3 Vinayak Chavan

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Posted 08 October 2014 - 08:20 AM

Since the relative volatility changes with change in column operating pressure, for unchanged column configuration (for same no of trays/ same packed bed height) reflux will change.



#4 breizh

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Posted 08 October 2014 - 11:43 PM

http://www.separatio...om/Mainmenu.htm

This resource should help you .Vinayak already gave clue

Breizh

#5 PingPong

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Posted 09 October 2014 - 03:58 AM

Please note that this topic is already a year old, so I don't think that jeetu911 will read any of the messages anymore.



#6 breizh

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Posted 09 October 2014 - 06:09 AM

May be others ! LOL

Breizh

Edited by breizh, 09 October 2014 - 06:09 AM.


#7 Padmakar Katre

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Posted 10 October 2014 - 12:10 AM

Will there be any effect on reflux when we use vacuum distillation? (P=40 torr)

 

Hi,

For a given or existing system with intended separation reflux will be a constant value; however as others mentioned the effect of pressure on system i.e. improvement in relative volatility with reduction in pressure will need lower reflux rate (subject to available margins in column hydraulic capacity as lower pressure will increase vapor volume rates and may lead to hydraulic issues).






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