Citric acid crystallization process in dense phase using vibrated bed |
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Authors: | Gustavo A. Teixeira,William F. VieiraJosé Roberto D. Finzer,Ricardo A. Malagoni |
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Affiliation: | Federal University of Uberlândia, School of Chemical Engineering, João Naves de Ávila Avenue, 2121 – Building, 1 K Santa Mônica, Uberlândia, MG 38.408-144, Brazil |
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Abstract: | This study evaluated mass yield, in crystallization of citric acid on a vibrated bed, using a large seed population (dense phase). A stainless steel crystallizer, jacketed and trunk-conical shaped was used in the crystallization experiments. The shaking system consisted of two perforated disks coupled to a mobile axle, which was connected to an eccentric. A central composite design (CCD) was used considering three independent variables: supersaturation level, dimensionless vibration number, and crystallization time, while the seed population (100,000 U) and operation temperature (55 °C) were fixed. Optimization of the experimental data obtained in the CCD was done finding the condition of maximum yield, 164.7%, which was experimentally tested and resulted in yield of 187.7%. An experimental simulation of serial crystallizers was studied, obtaining 166.9% yield, which was effective for obtaining crystals of greater final dimension. |
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Keywords: | Citric acid Crystallization Dense phase Vibrated bed Yield |
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