Complex Utilization Of Waste Oil And Fat

Waste oil and fat, which comes from families and cookeries, is one of the resources of environment pollution. This paper focuses on using decoloration and methyl-esterification technology to change some of its qualities and making it renewable.Activated bleaching-earth was used as an adsorbent in decoloration process. By studying the results of different factors, we found the best technology condition. The discolored waste oil and fat can be mixed with fuel directly to be ignited.The paper emphasizes on the preparation of fatty acid methyl-ester (FAME) by waste oil and fat and methanol. FAME is not only a widely used organic intermediate,but also used as biodiesel. In this part, we analyzed the condition of pre-esterification and esterification, and found out the best method. Besides that, we examined the characteristics of FAME as a fuel to confirm its advantages, such as starting under low temperature and environmental. At the same time, GC and GC-MS were used to give information about its quantity and quality. Based on this, we explored to separate the mixture to single component by distill under high vacuum condition. The single FAME will be more useful and economic. Related studies have not been reported.The usages of waste oil and fat were widened by above method. It will not only help to solute the pollution problems, but also low the cost of biodiesel and FAME. We believe it has more potential.