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Experts

Crystallization

Wayne Genck, president, Genck International

Wayne Genck is president of Genck International, Richton Park, Ill. He has specialized in industrial crystallization and precipitation for over 20 years. He has presented numerous seminars and courses on the subject and also written extensively about it, including authoring the chapter on crystallization in the 3rd edition of the “Handbook of Separation Techniques for Chemical Engineers.” He is a member of the steering committee of the Association of Crystallization Technology.

Crystallization of hydrates
I am carrying out crystallization of hydrates by evaporation. I have a slurry at 70ºC and I want to separate the crystals from the slurry. The problem is that as soon as I start filtration, it is exposed to an atmospheric temp and agglomeration and the transformation of crystals take place. Will you please suggest a way to get rid of this? The set up is for a 200-ml batch reactor. I stop crystallization and then I start filtration by pouring the slurry into a filtration funnel. Instead of filtration, agglomeration takes place.
Category: Crystallization

Supersaturation chemicals
How do I obtain supersaturation for chemicals in which solubility increases with temperature until after a point, it decreases? What type of supersaturation is it?
Category: Crystallization

Relative supersaturation for calcium oxalate monohydrate
I came across the relative supersaturation for calcium oxalate monohydrate (Ca₂C₂O₄.H₂O) as 1.2. How does one come up with that figure? How was it calculated?
Category: Crystallization

Atomizer nozzle for reaction crystallization
For reaction crystallization in a semi-batch reactor setup, if a atomizer nozzle is attached to the feed pipe, would the product quality be affected? If yes, in what ways? Would it improve mixing, and thereby selectivity?
Category: Crystallization