Purification of Aluminum Nitrate Nonahydrate by Melt Crystallization

Research Progress and Model Development of Crystal Layer Growth and Impurity Distribution in Layer Melt Crystallization: A Review

“…Meanwhile, the separation efficiency varies with the location of the crystal layer because of the different temperatures and impurity distributions, even when the experiments are implemented in laboratorial scale. This conclusion has been verified in separate literature. ,, This means the sweating process in melt crystallization requires extremely strict temperature control. To control the temperature with high accuracy, more advanced measurement technology (deviation smaller than 0.1 K, for instance) and novel designed crystallizers are crucial.…”

“…This conclusion has been verified in separate literature. 12,44,83 This means the sweating process in melt crystallization requires extremely strict temperature control. To control the temperature with high accuracy, more advanced measurement technology (deviation smaller than 0.1 K, for instance) and novel designed crystallizers are crucial.…”

Product Yield, Purity, and Effective Distribution Coefficient in Stripping Crystallization of R-2-Amino-1-phenylethanol from the Enantiomer Mixture

“…By heating the cooled surface of the final SC product closely up to the melting point of R -APE, the melting takes place preferentially on the mixture melt due to its lower melting temperature compared to pure R -APE. Subsequently, the melt adhering to the crystal surface and the melt contained in the crystal are expelled. ,− …”

Chiral Purification of S-2-Phenylpropionic Acid from an Enantiomer Mixture by Stripping Crystallization

“…Shiau and co-workers have introduced a new separation technology, stripping crystallization (SC), to separate some mixtures with close boiling temperatures, including mixed xylenes − and enantiomer mixtures. , Basically, SC applies melt crystallization and vaporization to a liquid mixture by lowering temperature and pressure, leading to the formation of a crystalline product and vapor mixture via a three-phase transformation. During melt crystallization, a pure desired crystalline solid is formed due to the solid–liquid transformation in a liquid mixture at normal pressure during the cooling process. − On the other hand, during SC, a pure desired crystalline solid along with the vapor mixture is formed due to the three-phase transformation in a liquid mixture at low pressures during the cooling process. − As the vapor mixture can be removed and collected, a pure desired crystalline solid is obtained as the product. If no liquid remains at the end of SC, neither crystal/liquid separation nor crystal washing is required after SC.…”