Crystallization Method to Reduce Filtration Time of Agrochemical Products

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Purdue University researchers have developed a crystallization methodology for more efficient purification of agrochemical compounds. Agrochemical companies need to abide by purity standards for the products and compounds they produce. Crystallization is a common technique utilized to refine impure compounds but is rife with challenges including long process and filtration times. To address these problems, Purdue University researchers developed an approach that optimizes the process time of crystallization. The system measures the real-time turbidity of the crystallization process and converges on a temperature to achieve optimum crystal growth. This technology has been used on a proprietary agrochemical compound and displayed three to four times faster filtration after crystallization of 200 grams of material (in 500 milliliter and 2-liter chambers) than traditional filtration methods. Successful implementation of this method not only generates feasible process parameter trajectories of an unknown agrochemical crystallization process with minimal thermodynamic knowledge, but also provides invaluable process and thermodynamic data (solubility, metastable zone width, crystallization kinetics) for future experimental or modeling studies. This technology promises to provide agrochemical companies with a more efficient process for attaining purity standards through crystallization.

Technology Validation: With a proprietary agrochemical compound, the researchers improved filtration times three to four fold over traditionally used filtration methods.

-Increased Efficiency of Agrochemical Compound Crystallization
-Significantly Reduces Filtration Time
-Rapid Process Design of Unknown Agrochemical Crystallization Systems

-Agrochemical Crystallization
-Compound Purification
Nov 11, 2020
United States
Purdue Office of Technology Commercialization
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West Lafayette, IN 47906

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