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dan ke zhi qu ning meng suan gai de xin gong yi yan jiu
Author(s): 
Pages: 68-71
Year: Issue:  32
Journal: Farm Machinery

Keyword:  鸡蛋壳柠檬酸钙置换法水热法;
Abstract: 以废弃鸡蛋壳为原料,将水热法和置换法结合运用,制取柠檬酸钙。首先研究了搅拌时间和静止时间对壳膜分离的影响,结果表明:搅拌时间为10min,静置时间为15min时去膜效果最好。在此基础上,考察了固液比、反应温度和反应时间等因素对柠檬酸钙产率的影响,并通过正交试验优化得到最佳工艺条件为固液比1∶12、蛋壳粉与醋酸在50℃下反应4.5h、柠檬酸与醋酸钙在55℃下反应2h。在此条件下,利用蛋壳制备柠檬酸钙的产率为90.92%±0.20%。
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