Forty-five hundred kilograms per hour of a solution that is 1/3 K2CrO4 by mass is joined by a recycle stream containing 36.4% K2CrO4, and the combined stream is fed into an evaporator. The concentrated stream leaving the evaporator contains 49.4 % K2CrO4; this stream is fed into a crystallizer in which it is cooled (causing crystals of K2CrO4 to come out of solution) and then filtered. The filter cake consists of K2CrO4 crystals and a solution that contains 36.4% K2CrO4 by mass; the crystals account for 95% of the total mass of the filter cake. The solution that passes through the filter, also 36.4% K2CrO4, is the recycle stream. 1.Calculate the rate of evaporation, the rate of production of crystalline K2CrO4, and the recycle ratio (mass of recycle/mass of feed).
2. If the filtrate were discard instead of being recycled, what would be the production rate of crystals?
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