Citric acid crystallization process in dense phase using vibrated bed

Teixeira, Gustavo A.; Vieira, William F.; Finzer, José Roberto D.; Malagoni, Ricardo A.

Citric acid crystallization process in dense phase using vibrated bed

2012

Teixeira, Gustavo A. | Vieira, William F. | Finzer, José Roberto D. | Malagoni, Ricardo A.

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 (100,000U) 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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