Abstract: In this paper，the decolorization is improved on the remelt syrup of brown granulated sugar by hemicarbonation method. The dosage of calcium hydroxide sodium bicarbonate and sodium polyacrylate is mainly studied. The clarification and decolorization effects are also investigated when the sodium bicarbonate is used as carbon source that replace carbon dioxide，at meanwhile，safe sodium polyacrylate is employed to replace unsafe polyacrylamide as flocculating agent. The optimal condition is determinated through orthogonal experiments. The result shows that the best clarification rate is 67.3% under the optimal condition as：Sodium Chloride dosage of 4 g/L，calcium hydroxide dosage of 7 g/L，sodium polyacrylate dosage of 0.008 g/L. The clarification and decolorization by hemicarbonation method is feasible，by which the amount of sulfurous acid can be reduced，the utilization of carbon sources can be improved，and the carbon filter mud and other environmental pollution problems can be solved.

Key words: brown granulated sugar, sodium chloride, calcium hydroxide, sodium polyacrylate, decoloration rate

摘要： 对现有的赤砂糖回溶糖浆澄清脱色工艺进行了改进，重点考察了碳酸氢钠替代二氧化碳作碳源物质，安全的聚丙烯酸钠替代不安全的聚丙烯酰胺作絮凝剂，并对氢氧化钙、碳酸氢钠和聚丙烯酸钠对赤砂糖回溶糖浆澄清脱色效果及其用量进行了研究，通过正交试验确定了赤砂糖回溶糖浆澄清脱色的最佳工艺条件。结果表明：碳酸氢钠量4 g/L、氢氧化钙量7 g/L、聚丙烯酸钠量0.008 g/L，最佳工艺脱色率达到67.3%。证明了赤砂糖回溶糖浆的半碳法脱色工艺可行，减少了亚硫酸的用量，提高了碳源的利用率，也解决了碳法滤泥多且污染环境的问题。

关键词: 赤砂糖, 碳酸氢钠, 氢氧化钙, 聚丙烯酸钠, 脱色率