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Problem 12.11-1 (Geankoplis) G2 5CHEA - JEAN RAYNELL BELLO

Problem 12.11-1 Crystallization of Ba(NO3)2. A hot solution of Ba(NO3)2 from an evaporator contains 30.6 kg Ba(NO3)2/100 kg H2O and goes to a crystallizer, where the solution is cooled and Ba(NO3)2 crystallizes. On cooling, 10% of the original water present evaporates. For a feed solution of 100 kg total, calculate the following: a. The yield of crystals if the solution is cooled toSet290 K (17°C), where the solubility 2 is 8.6 kg Problem in Crystallization

Problem 12.11-1

The solution is cooled to 290 K Feed 100 kg solution 30.6 kg Ba(NO3)2/100 kg H2O

Problem Set in Crystallization

W = 10% H2O

x kg solution Crystallizer

C kg Ba(NO3)2 crystals

8.6 kg Ba(NO3)2/100 kg H2O

3

Problem 12.11-1 •H2O   BALANCE:

Ba(NO3)2 BALANCE:

Problem Set in Crystallization

4

Problem 12.11-1

The solution is cooled to 283 K Feed 100 kg solution 30.6 kg Ba(NO3)2/100 kg H2O

Problem Set in Crystallization

W = 10% H2O

x kg solution Crystallizer

C kg Ba(NO3)2 crystals

7.0 kg Ba(NO3)2/100 kg H2O

5

Problem 12.11-1 •H2O   BALANCE:

Ba(NO3)2 BALANCE:

Problem Set in Crystallization

6