Abstract: A distillation apparatus for removing a solvent from a feed solution and producing a concentrated solute with mechanical recompression of vapor. A pre-heating heat exchanger receives and heats the feed solution from a previously produced intermediate instance of the vapor. A heat exchanger receives the feed solution from the pre-heating heat exchanger, to further heat the feed solution from heat in the vapor, and there from produce the vapor and the concentrated solute. A separator separates the vapor and the concentrated solute. And a compressor receives and compresses the vapor.