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An Experimental Study of Spherical Agglomeration of Benzoic acid And Influence of Process Parameters

Jyothi Thati, Vijaya Laxmi Avula, Pushpalatha C, Sailu Chintha


Through the process of drowning-out crystallisation in three partly miscible solvent mixtures, sphere aggregates of benzoic crystal have been successfully created. The mixture of benzoic acid, isopropyl alcohol, and bridging liquid is supplied to an agitated crystallizer with water acting as the anti-solvent. When a substance crystallises, little crystals are formed, and the bridging liquid causes the crystals to group together. Different solvents are utilised because benzoic acid crystals wettably adhere to chloroform, toluene, heptane, and pentane, which are all low solubility in water and chosen as bridge liquids. Investigated are the effects of process variables such solute concentration, temperature, stirring rate, processing duration, volume of bridging liquid, and stirring rate on the characteristics of spherical agglomerates of benzoic acid as part of the standard spherical crystallisation experiment, many sets of tests were carried out to monitor how the particle properties gradually changed. The current investigation demonstrates that the bridging liquid significantly affects the product qualities since it allows the formation of spherical agglomerates with four different solvents (chloroform, toluene, heptane, and pentane) when utilised in adequate quantities. When the BSR is 0.72, the particle morphology changes to become spherical; when toluene is employed as the bridging liquid, the particle morphology is totally spherical. With increasing temperature particle size is decreasing. Spherical agglomerates are obtained at 1100 rpm. At 5°C, particles became spherical. Morphology grew as temperature decreased.

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