烷基多苷的过氧乙酸漂色及组合漂色工艺研究

Study on bleaching process of alkyl polyglycosides by peracetic acid and hydrogen peroxide

对烷基多苷（APG）的过氧乙酸（CH3COOOH）漂色工艺进行了优化，优化条件是：烷基多苷（APG）水溶液的浓度为50％，CH3COOOH用量为5％，漂色时间90min，漂色温度80℃，初始pH12-12．5。在此条件下漂色，可使APG水溶液的消光系数由6～7降至0．4左右；采用质量分数分别为3％的H2O2与CH3COOOH组合漂色，可使漂色效果进一步提高；对H2O2与CHCOOOH漂色前后的APG样品进行了红外光谱对比分析。

The bleaching of alkyl polyglycosides with peracetic acid was investigated. The optimal condition was that the concentration of APG is 50% ,the dosage of CH3COOOH is 5% ,the bleaching time is 90 rain, the bleaching temperature is 80℃, the pH value is 12 - 12.5. Bleached under these conditions, the extinction coefficient of APG can be reduced from 6 - 7 to 0.4 or so. Furthermore, the effect of bleach can be increased by the sequence of 3% H2O2 and 3% CH3COOOH. The IR analysis of APG before bleached and after bleached was given.