Abstract:

The dehydration process conditions of bleached shellac while desalination washing was investigated by experimental design with response surface method（RSM）. The dehydration rate，color index and the water-solubles in product were determined under different washing time and temperature，through which a fitting equation of the process was established. Results showed that the equation was well fitted，and the established mathematical model could be used to describe the dehydration and desalination process of bleached shellac. The optimal dehydration and desalination process conditions were found at 33 ℃ for 11 min washing，under which，products were obtained with dehydration rate of 69.29%，color index of 1.0 and water-solubles of 0.3969%.

摘要：

为减轻后续工艺的生产压力、提高生产效率，研究了在漂白紫胶水洗脱盐的同时脱水的工艺条件。为得到漂白紫胶脱水除盐工艺的优化条件，研究了不同水洗温度和水洗时间条件下漂白紫胶产品的脱水率、颜色指数和水溶物，用响应曲面法（RSM）设计试验并建立了该工艺条件的拟合方程。试验结果表明，拟合方程的拟合度较高，所建立的数学模型可以用于描述漂白紫胶的脱水除盐工艺。通过优化得到了漂白紫胶脱水除盐工艺的最优条件：温度为33 ℃、水洗时间为11 min，可以得到脱水率为69.29%、颜色指数为1.0、水溶物为0.3969%的产品。