关键词: 赤砂糖, 碳酸氢钠, 氢氧化钙, 聚丙烯酸钠, 脱色率

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