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Water generated by esterification can be removed as it is formed by way of pervaporation. We obtained some pretty good results with a ceramic pervaporation membrane, even under acidic environment. You can contact me at: maurice.velterop@pervatech.nl

Maybe it is somewhat out of the scope of this discussion, but DMF and water can be readily separated by pervaporation.Take a look at www.pervatech.com

Maybe a bit late, but have you thought about preferential removal of water by using a membrane? Ceramic membranes could do the trick here. That way you do not need to recycle the FB for breaking the azeotrope. maurice.velterop@pervatech.nl

Pervatech BV in the Netherlands also has a representation in the UK. You can contact them through info@pervatech.nl .

Please contact me separate from this forum. I think we can be of help. maurice.velterop@pervatech.nl www.pervatech.com

For pervaporation membranes that can handle temperatures up to 250 degrees C, I refer to the web page: www.pervatech.nl. They have ceramic pervaporation membranes suitable for pervaporation or vapor permeation. Dehydration of ethanol at these temperatures is not a problem for these type of...