6 replies to this topic

[swaiba]

Hi

I am designing an HCl distillation column at 13bars.

I have finished my column design, however with the condensation, I am trying to find out refrigerants or cooling fluid to condense HCl.

I would like to know if I can use cooling fluids who have lower boiling points than HCl at atmospheric pressure such as Propylene, I am confused whether I should consider the properties of the cooling fluid at 13 bars or can I assume it at atmospheric.

I would really appreciate for any thoughts or contributions onto this matter.

Regards
Swaiba

[srfish]

Hello,

Whatever you use has to have a colder temperature than the condensing HCl. Since HCL has a atmospheric boiling point of -85C, Then propylene with a boiling point of -53.8C is not cold enough.

[swaiba]

Hello Srfish

Would you suggest a commercial industrial cooling fluid which may be feasible to condense the HCl.

Regards

[srfish]

Swaiba,

Methane or one of the cryogenics.

[Art Montemayor]

Swaiba:

When looking for a commercially available and applicable cryogenic fluid, liquid nitrogen (LIN) is always a a first choice to consider. It is available almost everywhere and is usually one of the least costly. Additionally, its inertness lends a safe atmospher to the operation.

[breizh]

Hi ,

Consider this resource to support your query :
You will find data about HCL and cryogenics .
http://encyclopedia....17&CountryID=19


Hope this helps
Breizh

[pavanayi]

Swaiba,
Are you looking for cooling media for the overhead condenser of the mentioned distilation column?
Then first you have to know the temperature at which HCl condenses at 13 bar (g or a?). When you say you have already completed that task, that temperature should be readily avaialbe to you.

But the refrigerant/coolant need not be at 13 bar. It just needs to be at a temperature cooler than the above value. You can choose any coolant (at atmospheric or other pressure conditions) which will suit your requirement.

In short, the cooling fluid pressure need not be 13 bar. That is the flexibility you as a designer have. Indeed the choice of coolant will include other variables as cost, ease of availability etc.

But Ideally, you should have an idea of what coolant you would use in the overhead condenser before you started to design the column. That provides you with a guideline to fix the pressure of the column. Why did you choose 13 bar as the column pressure in the first place?

Edited by pavanayi, 01 March 2012 - 03:32 AM.