摘要
试验以鸭蛋壳为原料,在真空环境中采用直接中和法制备乳酸钙。在单因素试验的基础上,选固液比、反应温度和时间3个因素进行中心组合试验,建立乳酸钙产率的二次回归方程,通过响应面分析及岭嵴分析得到最佳制备工艺条件为蛋壳粉粒度100目,蛋壳过料量30%,固液比1∶11,反应温度44℃,反应时间2.3 h,在此条件下乳酸钙产率达到最高,为75.56%,与预测值73.773 4%接近,乳酸钙结晶在浓缩体积在60%时为最佳。
Calcium lactate was made from eggshell in vacuum.The lactate was added in to react with eggshell to prepare calcium lactate by direct reaction.According to the single-factor experiments,three levels of the factors including solid-liquid ratio,extraction temperature and time were selected to establish a quadric regression equation for describing the yield of calcium lactate.Through response surface analysis,the optimal extraction conditions were eggshell particle size of 100,excessive rate of eggshell 30％,solid-liquid ratio of 1：10.5,extraction temperature of 44.2 ℃ and time of 2.3 h.Under the optimal conditions highest yield of calcium lactate with estimated and verified value was 73.77％ and 75.56％,respectively.It is found the end product from calcium lactate solution was best when the concentrated volume percentage was 60％.
出处
《湖北农业科学》
北大核心
2014年第20期4931-4935,4940,共6页
Hubei Agricultural Sciences
基金
国家星火计划资助项目(2013GA760002)
国家水禽产业技术体系资助项目(nycytx-45-14)
湖北省农业科技创新中心农产品加工分中心资助项目(2014-620-007-001)
关键词
鸭蛋壳
中和反应
乳酸钙
响应面法
eggshell
neutralization reaction
calcium lactate
