Influence of Molecular Interaction on Crystallization Behavior of Glycine from Mother Liquor |
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Authors: | TAO Chang-yuan LI Ming-song FAN Xing LIU Zuo-hua DU Jun |
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Affiliation: | College of Chemistry and Chemical Engineering, Chongqing University, Chonqing 400044, P. R. China |
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Abstract: | The mother liquor for preparing industrial HCN was investigated, to analyze the side-products’ structure and influence of molecular interactions of side-products with glycine and solvent on the glycine’s crystallization process. The side-products(SPs) were super-branched oligmers with plenty of hydrophilic groups, which could affect the crystallization process by interactions such as hydrogen bond. Alcohol-water mixed solvent with different polyols could be used to weaken the SPs-glycine interaction and strengthen the SPs-water interaction, which help to improve the crystallization efficiency and purity. After optimization, SPs’ mass fraction in glycine could be reduced by 80% and the morphology of crystal particles could also be improved. |
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Keywords: | Glycine Mother liquor Molecular interaction Mixed solvent Crystallization |
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