Definition Fractional distillation, also known as rectification, is a separation process in which repeated vaporization and condensation occur within the same equipment to separate the components of a liquid mixture. It is a specialized form of distillation designed for mixtures…
Definition Reactive distillation, also known as catalytic distillation, is a process technology that integrates chemical reaction and distillation separation within a single unit. In practical applications, heterogeneous catalytic reactions and product separation occur simultaneously inside a reactive distillation column. Unlike…
Definition Crystallization is a separation process that utilizes differences in the solubility of one or more dissolved solids in a solvent to achieve purification or separation. When the solubility of a target substance decreases under specific conditions, such as temperature…
Definition A crystallizer is a piece of process equipment used to perform crystallization operations. Its primary function is to promote the formation and separation of solid crystals from a solution by creating a controlled state of supersaturation. In industrial practice,…
Definition Silicon (Si) is a chemical element belonging to Group IVA (Group 14) of the periodic table with an atomic number of 14 and an atomic weight of 28.0855. It occurs in both amorphous and crystalline forms and is one…
Definition Fluorosulfonic acid (FSA), also known as fluorosulfuric acid, is a highly corrosive inorganic acid with the chemical formula FSO₃H and a molecular weight of 100.06. It is a colorless liquid known for its extremely strong acidity and high chemical…
Definition Diethyl carbonate (DEC), also known as ethyl carbonate, is an organic carbonate compound with the molecular formula C₅H₁₀O₃ and a molecular weight of 118.13. It is a colorless, transparent liquid with a slight irritating odor and exhibits many of…
Melt crystallization appears straightforward in terms of its process flow: melting the material via heating, crystallizing via cooling, draining the mother liquor, sweating via controlled heating, and finally, melting the purified product. However, the ultimate purification efficiency is dictated not…
In melt crystallization experimental logs, one frequently encounters seemingly routine descriptions: needle-like crystals, scale-like crystals, good wall adhesion, drainable mother liquor, late-stage sweating collapse, or increased material viscosity. Far from being secondary observations, these qualitative descriptors are critical indicators used…
Most people observing a melt crystallization experiment for the first time focus on a single question: Has the material crystallized? However, in actual experimental practice, our primary concern is different: How well has it crystallized? The absence of crystallization is…