纳米碳酸钙对赤砂糖回溶糖浆的脱色性能及其工艺的优化

Research on the Pocess of Clarification and Decolorization by Nanometer CaCO_3 for Remelt Syrup of Brown Granulated Sugar

采用碳化法制备了立方体状的纳米碳酸钙,以赤砂糖回溶糖浆为研究对象,探讨纳米碳酸钙对赤砂糖回溶糖浆的脱色性能,并以脱色率为指标,考察了纳米碳酸钙用量、预灰p H、吸附时间和吸附温度等因素对赤砂糖回溶糖浆脱色率的影响情况及规律,并通过正交试验优化了工艺条件。最佳的脱色工艺为:纳米Ca CO_3用量5 mg/m L、吸附温度70℃、吸附时间20 min、预灰p H 7.30,在此条件下,脱色率可达12.9%。

Calcium Carbonate Nanoparticles was synthesized by carbonization method. By studying the remel syrup of brown granulated sugar, the feasibility of the process of decolorization was explored by nanometer CaCO_3. With decolorization rate as the index, variables effects such as nanometer CaCO_3 dosage, preliming p H value, absorption time, absorption temperature was evaluated for the decolorization for the remelt syrup of brown granulated sugar. The orthogonal test has been proceed to optimize the experimental conditions, the results showed that the optimal process conditions for the decolorization rate were as followings： nanometer CaCO_3 dosage 5 mg/m L, absorption temperature 70 ℃, absorption time 20 min, preliming p H 7.30. Under these optimal conditions, the decolorization rate was 12.9%.