Solvent extraction unit

[Kheeley]

I'm trying to build a unit to model solvent extraction from biomass, I don't need it to be super precise or accurate, so I am essentially looking for a unit that would work with the equilibrium values (ie, solubility of the components in the biomass). I am making some progress utilising the SLE modeling in thermosteam, but that only works with components solid at the given temperature and I am having some other issues with it. I would be very much welcome any suggestions/advice for this