6 replies to this topic

[jeetu911]

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

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

[S.R.Shah]

Please elaborate and describe your question with PFD

[Vinayak Chavan]

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.

[breizh]

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

This resource should help you .Vinayak already gave clue

Breizh

[PingPong]

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

[breizh]

May be others ! LOL

Breizh

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

[Padmakar Katre]

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).