Method for preparing bio diesel oil by idesia polycarpa maxim. var. vestita diels oil catalysis using solid base as catalyst

Abstract

The present invention discloses a technique which uses solid alkali to catalyze idesia polycarpa var.vestita bites to prepare biodiesel. After the extracted idesia polycarpa var.vestita bites is treated by the processes of degumming, alkali refining and deacidification and decolorization, solid alkali Mg-Al composite oxide is utilized to catalyze low-carbon alcohol, so that ester exchange reaction occurs between the low-carbon alcohol and the idesia polycarpa var.vestita bites to prepare crude biodiesel, and after depressurization and distilling, the light-colored refined biodiesel is produced. The yield of the biodiesel prepared by the technique is high, the product reaches the national standards, meanwhile, the production cost of the biodiesel can be reduced, the service life of equipment can be prolonged, the subsequent separation process can be simplified, and the drainage of industrial waste water can be reduced.

Description

technical field [0001] The invention belongs to the technical field of preparing biodiesel from jatropha oil, and in particular relates to a method for preparing biodiesel from jatropha oil catalyzed by a solid base. Background technique [0002] With the rapid development of the world economy, human beings consume more and more energy, while the non-renewable oil and coal stocks are getting less and less. The shortage of energy has become a top priority for human beings. Material energy has become a hot spot of common concern around the world. [0003] Fuel ethanol and biodiesel have become the main research objects of biomass energy. According to the definition of the American Society for Testing and Materials (ASTM), biodiesel refers to a long-carbon chain fatty acid monoester produced from renewable biological resources such as animal and vegetable oils and fats, which can be used as a clean alternative fuel for compression ignition engines; it It is produced by the tr...

AI Technical Summary

Problems solved by technology

But there are also some disadvantages, such as saponification side reactions are prone to occur, the by-product glycerin is not easy to separate and purify, the catalyst cannot be reused, and the equipment is severely corroded, especially in the refining process, which requires water washing, which will bring a lot of industrial wastewater, etc.

As the preparation of biodiesel, rough jatropha oil is no exception. It also needs to be catalyzed by transesterification to become refined oil, and the catalysts currently used are not separated from traditional alkaline catalysts.