Many tasks in the chemical industry require the physical properties of chemical components. Properties are molecular weight, density, critical pressure and more.

The calculation mixture properties, e.g. specific heat capacity, vapor viscosity, thermal conductivity and many more require these properties.

This code snippet explains how to access the physical properties from the CHEMCAD physical properties database:

%Retreive pure component data for any componet 
%on the current component list of the flowsheet
try
%Path to load the CCAPI DLL. Replace the path according to your user
%account

asmInfo = NET.addAssembly('C:\Users\...\Documents\My Simulations\CC-API\CGC.CC-API.dll');

%Starting CHEMCAD Server
chemcad = CCAPI.Server;

%Path to the CHEMCAD flowsheet
path = '..\..\Deisobutanizer.cc7';

%Loading the CHEMCAD flowsheet to MATLAB
chemcad.LoadFlowsheet(path);
flowsheet = chemcad.CurrentFlowsheet;

%Select the second component present in CHEMCAD flowsheet
%In this case, it is N-Butane
selComponent=flowsheet.GetComponentByPosition(1);

%Print the physical properties of the selected component
%Names of the variables are self explanatory. 
Name=selComponent.Name

MolecularWeight=selComponent.MolecularWeight

CriticalTemperature=selComponent.CriticalTemperature %R

CriticalPressure=selComponent.CriticalPressure %psia

AccentricFactor=selComponent.AcentricFactor

NormalBoilingPoint=selComponent.NormalBoilingPoint %R

%Release the COM objects
chemcad.Release;
chemcad=0;
asmInfo=0;
flowsheet=0;
%It is recommended to use the following code
%to handle exceptions
catch e 
e.message
if(isa(e,'NET.NetException'))
e.ExceptionObject
chemcad.Release;
chemcad=0;
asmInfo=0;
flowsheet=0;
 end
end

Files:
Download Deisobutanizer.cc7