Original Articles
Cheng Yuan, Huifen Zhang, Mi Z
Abstract
Montan wax of removed resin of E’shan from Yunnan province as the investigation object, L value of the chroma as the main investigation index, environment friendly bleaching techniques of montan wax of removed resin were explored. The bleaching effect of three kinds of oxidation systems, i.e., Peroxide (P), Peracetic acid (Pa) and P & Pa was explored, which showed that P & Pa combined system was better than the single systems of P and Pa. The optimization of main process parameters of P & Pa combined system by using the response surface method drew to the optimal conditions: the material ratio of Pa bleaching stage in the combination-20:1, the material ratio of P bleaching stage in the combination-36.7:1, time(t)-80min, temperature(T)-118.5℃. And under this condition, the L value of the product was 62.02, which was almost consistent with the model prediction.