5 replies to this topic

[Mahendar Errala]

This is Mahendar Errala from India.

I have to design a batch distillation column for dehydrating N-Methyl piperazine which is having 4.0% moisture.

I am not getting VLE data for N-Methyl piperazine+Water mixture at 100mmHg absolute pressure from the literature or internet.

Could somebody help me in finding Antoine coefficients and vapor pressure for N-Methyl piperazine.

I hope that someone will help me.

Thanks in advance.

[S.R.Shah]

If you shall not get data;please check with small glass pilot plant to generate data like height require to have desired purity.This may be done in your R and D lab.

[Steve Hall]

Here are the coefficients as found in Yaws, Carl L; Narasimhan, Prasad, K.; Gabbula, Chaitanya, Yaws' Handbook of Antoine Coefficients for Vapor Pressure (2nd Electronic Edition), Knovel.

1-Methyl Piperazine, CAS 109-01-3
A = 7.62185
B = 1686.39
C = 217.7
Tmin = 3.56 C
Tmax = 189.2 C


The correlation for vapor pressure as a function of temperature is based on the Antoine equation:

Log10 P = A – B/(T + C)

where

P = vapor pressure, mm Hg
A, B and C = Antoine coefficients for compound
T = temperature (centigrade), C The tabulated values are based on regression of experimental data and researched estimates.
Tmin and Tmax describe the temperature range for which the equation is valid.

[Mahendar Errala]

Thankyou Mr.Steve Hall.
The data provided by you is very much usefull for me.

Mahendar Errala

[Mahendar Errala]

Dear members,

I also in searching of data regarding 1-Methyl Piperazine(CAS 109-01-3) thermodynamic Properties at 100mmHg absolute pressure such as density, Latent heat of vaporisation, Specific heat & Viscosity.

I hope that someone will help me.

Thanks in advance.

[S.R.Shah]

Really Helpful and good information.If Antoine constants for 1-Methyl Piperazine is available,For any such large molecule,we have to gcheck this reference.