大孔吸附树脂精制紫胶红色素的研究

研究大孔吸附树脂吸附精制紫胶红色素的工艺。以紫胶红色素吸光度为指标，比较大孔吸附树脂的吸附性能和解吸参数，筛选从紫胶洗色原液精制紫胶红色素的较优大孔吸附树脂，确定大孔吸附树脂精制紫胶红色素的工艺参数。结果表明：AB-8 大孔吸附树脂对紫胶红色素有良好的吸附性能；解吸液为pH7、20% 乙醇溶液，除杂精制效果好，解吸率大于90%；经AB-8 大孔吸附树脂吸附/ 解吸精制后的色素色价是未精制色素的2.96 倍，树脂可多次重复使用，说明采用大孔吸附树脂精制紫胶红色素是可行的。

Purification of Lac Red Pigment by Macroporous Resin

The purification of lac red pigment using macroporous absorption resin was investigated in this paper. The absorbance of lac red pigment was used to evaluate the absorption characteristics and desorption parameters of macroporous resins for screening optimal resin and establish an optimal purification processing parameters. Results indicated that type AB-8 macroporous resin had the best absorption capacity. The absorption rate was up to 90% at the condition of absorption solution with 20% ethanol at pH 7. Compared with lac red pigment without treatment of macroporous resin, the color value of lac red pigment treated with macroporous resin exhibited an enhancement of 2.96 folds. Meanwhile, macroporous resin can be repeatedly used. Therefore, it is feasible to purify lac red pigment by using macroporous resin.