Study On Isolation And Purification Of High-Level Fatty Alcohol From Bran-wax

As a recently developed saponification technology of bran-wax, there are so abundant bran-wax sources in our country that bran-wax could be utilized more adequately than before. By the experiment of isolation and purification of high-level fatty alcohol from bran-wax, the influence of process conditions on bran-wax saponification was studied systematically. The optimal process conditions that are in both microwave radiation and none microwave radiation were proposed. The bran-wax saponification reactions dynamic modeling were performed according to the chemical reaction engineering mechanisms and comparing parameter of none microwave radiation saponification dynamic modeling with parameter of microwave radiation saponification dynamic modeling.Bran-wax saponification was performed in the constant temperature container in the experiment. The compound was desiccateted and comminuted then the high-level fatty alcohol was extracted from cyclohexane solution. The extraction compound was heated and melted in cyclohexane solution. The crystal could be obtained from the cyclohexane solution step by step under room temperature and the product was analyzed by performing systematic GC. The optimum process conditions under none microwave radiation, with reacting catalyst peregal A-20, reacting temperature at 90 , reacting time 3hr, KOH excessive percent of 91.5%, were obtained according to the saponfication rate. The microwave radiation optimum process conditions ,with reacting catalyst peregal A-20, microwave radiation time 5min, reacting time 1.5hr, KOH excessive percent of 113.8%, were acquired based on the saponfication rate.Several hypotheses were made in the saponification dynamic model, further more, the non heat effect view in microwave-induced organic reactions enhancement chemistry was considered efficaciously. Because microwave radiation affects saponfication rate more faintly than other factors, microwave radiation affecting saponfication rate was attributed to catalyst effect. Both none microwave radiation and microwave radiation saponfication dynamic models were power equations. Because the hypothesis that power of saponfication reaction was one was wrong, wecould work out the parameters of saponfication dynamic models by data of experiments and MATLAB function.