Print page

Print page

Is there equipment that filters, washes and dries?

Q: Is there any equipment that is used as reaction (precipitation) plus filtration plus solvent wash plus filtration cum dryer in series? Such equipment can reduce capital cost significantly and also result in almost no solids handling, since in our case dried product has to be dissolved in a solvent.

A:

Yes, automated nutsches that rotate during the precipitation step, then stop when done to begin the filtration step, then cake wash, followed by vessel wall heating to dry the product. 

These, however, are expensive and have generally low capacity due the many steps. If higher capacity is required then I would suggest a separate reaction tank which when reaction is complete is pumped to a drying filter press that can do the solvent wash as well as the cake drying. These filter presses are quite flexible and a few companies make them.

Back to Ask the Experts