中文摘要：

以固体碱硅酸钠为催化剂进行酯交换反应制备生物柴油。采用响应曲面法中的Box-Behnken模式对影响生物柴油转化率的4个主要因素（温度、催化剂用量、反应时间、醇油物质的量比）进行优化，建立生物柴油转化率的二次多项回归模型方程，并对回归方程系数进行显著性检验和方差分析。试验结果表明：当反应温度为66℃、催化剂用量为大豆油质量的2．1％、反应时间为7h、醇油物质的量比为8．6：1时。生物柴油的转化率最高，最高转化率预测值为75．78％，与实测值基本相符，优化模型有效可靠。

英文摘要：

Transesterification using the solid sodium silicate catalyst to prepare biodiesel was studied. The factors of temperature, catalyst concentration, reaction time, methanol to oil molar ratio on the conversion of biodiesel were optimized with Box-Behnken mode of response surface methodology. And a mathematical regression model for the conversion of biodiesel was built, the test of significance and variance analysis for regression equation were also analyzed. The result showed that the optimum condition for the production of biodiesel catalyzing by solid sodium silicate catalyst were： temperature at 66 ℃, 2.1% catalyst of oil, reaction time for 7 h, and methanol to oil molar ratio of 8.6：1, the predicted optimum conversion rate of biodiesel was 75.78%, which was in consistent with the measured value, the regression equation is valid and reliable.