有机化学实验混合溶剂重结晶操作规范建议

doi:10.12461/PKU.DXHX202504073

Abstract

Abstract: Mixed-solvent recrystallization is a commonly used and highly selective purification method. However, systematic operational guidelines are still lacking in current teaching, and students often encounter issues such as inappropriate solvent selection or improper techniques, resulting in failed crystallization or low purity. This paper outlines the basic principles and procedures of mixed-solvent recrystallization, clarifies key steps including solvent selection, decolorization, hot filtration, and crystallization induction, and proposes practical guidelines. These recommendations are feasible and widely applicable, offering a reference for standardizing laboratory instruction.

Key words: Organic chemistry experiment, Recrystallization, Mixed solvent, Standardized operational guideline

Chengshan Yuan, Xiaolong Li, Xiuping Yang, Xiangfeng Shao, Zitong Liu, Xiaolei Wang, Yongwen Shen. Standardized Operational Guidelines for Mixed-Solvent Recrystallization in Organic Chemistry Experiment[J].University Chemistry, 2025, 40(5): 122-127.

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Standardized Operational Guidelines for Mixed-Solvent Recrystallization in Organic Chemistry Experiment

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