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| Study on the improvement process of glycine particle size |
| Wang Qingqing， Li Guiping， Zhang Zhenyou， Zhao Xiaolan， Gao Haifang |
| Shijiazhuang Chiyuan Chemical Corporation Ltd., Shijiazhuang 051430, China |
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Abstract Granularity is an important index to determine the quality of glycine products. In order to achieve the purpose of improving the granularity of glycine in large-scale production, the effects of stirring speed, methanol flow rate, cooling water temperature and addition of granulation reagents on the granularity of glycine crystals from the perspective of actual production were systematically studied. On the basis of the existing production process, the optimal control conditions of each parameter were determined one by one by controlling the variables. Finally, the optimal crystallization conditions were obtained as follows : stirring speed 65 r / min, methanol flow rate 70 mL / min in the early stage and 130 mL / min in the later stage, cooling water temperature 20 °C, and reagent addition amount 2 mL / pot, which achieved the purpose of improving the granularity of glycine products.
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