Copper sulfate CuSO4 precipitates from aqueous solution as copper sulfate pentahydrate CuSO4-5H2O. Assume that the solubility limit of copper sulfate is 0.950 M independent of temperature and that the specific gravity of the saturated solution is 1.10.

A saturated solution of copper sulfate in water enters an evaporator at a rate of 50.0 L/h. In the evaporator 30.0 % of the water is removed and leaves the evaporator as vapor. The remainder of the liquid stream leaves the evaporator carrying precipitated copper sulfate pentahydrate crystals. This stream is fed to a filter where all of the crystals are removed in the filter cake. The cake also contains 10 wt % saturated solution. The wet cake is then heated until all of the liquid water evaporates, leaving only copper sulfate pentahydrate crystals.

Find the mass flow rate of copper sulfate pentahydrate crystals leaving the process.

Answer rating: 100% (QA)

The saturated solution flowrate 50 Lh density 11 so 50 x 11 55 kgh Concentration 095 M of CuSO4 MWt ... View the full answer