Studies On Bleach Technology And Saponification Technology Of Waste Edible Oil From Catering Trade

Waste edible oil from catering trade is gained from the separate oil pool of land ditch in the guesthouse and the wine shop , which is distilled by simple drying dehydration removing dregs neutralization and sediment. It's appearance submits yellowish-brown with special stink. It is the Waste edible oil that can not be eatten because it contains many harmful compositions for human body. If it is not collected to use , not only wastes valuable natural resource but also can still cause twice pollution. In view of this, this paper studies bleach technology and saponification technology of Waste edible oil, radically solves the problems of discarded oil that regurgitantly enters edible oil market and pollutes environment, wastes resource. So, this study have certain society environmental protection as well as economic meaning.With the pHysical and chemical method this paper studies the bleach technology of the Waste edible oil from catering trade, has respectively discussed the bleachmechanism of the Waste edible oil with three bleach reagents of different types--active bleaching earth, Diaobaikuai and peroxide. On the base of discussing the influencing factor of bleachability, reaches three bleaching technology conditions. After comparing the bleach effect between the unitary bleach reagent and the match bleach reagent ,selects the best bleach reagent and it's bleach technology condition.This paper studies the saponification method and saponification mechanism of Waste edible oil from catering trade. According to oil in saponification course, the carbon oxygen double-keys of the glycerine ester of fatty acid will transform the carbon oxygen double-keys in the salt of fatty acid, the absorption location of the carbon oxygen double-keys in two structures is different in infrared spectrum. And with infrared spectrometer mensurates the infrared spectrograms of saponification reaction different stages, compares the relative intensity of the absorption apices to analyse the saponification sample of the Waste edible oil and definites saponification level, then discusses the influencing factor of saponification degree. After groping , reaches the best saponification technology condition: the saponification time is 4hours, the saponification temperature is 100 C, the ratio of alkali number consumed and the Waste edible oil's quality is 1: 2, and the density of sodium hydroxide is 30%.