KẾT TINH POTASSIUM DIHYDROGEN PHOSPHATE - SỰ TIẾN HÓA CỦA KÍCH THƯỚC HẠT
Email tác giả liên hệ:
tamlm@hcmute.edu.vnDOI:
https://doi.org/10.54644/jte.2025.1753Từ khóa:
KDP, Solid-liquid equilibrium, Meta stable zone width, Crystallization, AntisolventTóm tắt
Potassium dihydrogen phosphate (KDP) is widely utilized in food additives, laser technology, and multi-nutrient fertilizers. Besides the purity, particle size distribution (PSD) of KDP is critical quality parameter, which is the primary focus in this study. For this purpose, a systematic study was carried out. KDP crystals were synthesized through a crystallization process employing various operation modes. The evolution of crystal size over time was monitored using two distinct techniques, including real-time online monitoring via laser measurement and offline analysis through microscopic analysis. The crystal growth dynamics were found to be influenced by the degree of supercooling and the anti-solvent employed. Crystals obtained through natural cooling versus anti-solvent technique exhibited that nucleation and crystal growth are strongly dependent on fluctuations in supersaturation levels. Chemical composition analysis of the optimized products revealed that the KDP crystals achieved a purity greater than 99%, confirming that the crystallization process was efficient, with minimal incorporation of impurities into the crystal structure, thereby ensuring the product's quality.
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