Formaldehyde-Water Equilibrium Curve

Well first making Formaldehyde with 0 % methanol is not possible because of the stability.

So You will not find this

Also Formaldehyde is a gas that you have to disolve in water

Amount of methanol when you are very well running (do not know because not enough statics given from your distillation colom) But with a very normal disign you can get to 1,0 to 5.0 % without any problem.

Hope this will help you

)

^^Thnx I know we can't get 100% methanol free formalin; but we have assumed nearly pure products. Sir what I really am asking is a equilibrium curve of formaldehyde-water system; just like ammonia-water system which too is a gas. Do provide me some resources where I can get this

Also if you may do provide me a general algorithm for designing multicomponent distillation column

Hi,

I designed an absorption column using AspenPlus simulations as an undergraduate project.

We had difficulty designing the column since we realised that formaldehyde is poorly soluble in water. However the formalydehyde does reacts with the water to form low moleculare weight polymer chains which readily disolve in water making the computation of the seperation processes very complex.

Fortunitally there are many authors whom have developed models to predict this behaviour and simplyify the calculations.

Unfortunitally I do not have any of the references on hand but a quick search in google scholar should help - try searching for: water - formaldehyde models.

Stephen

see this http://www.scribd.com/doc/38763854/Formal-In Formaldehyde is readily soluble in water but without VLE data how can I know the no. of stages if I am using plate type absorption column