Method for preparing biodiesel by utilizing food waste recycling oil

Abstract

The invention relates to a method for preparing biodiesel by utilizing food waste low-cost high-efficiency recycling oil, which is realized by four steps of dining waste oil degumming and impurity removing treatment, acid catalytic esterification reaction, base catalytic transesterification reaction and biodiesel refining. The final product is colourless biodiesel, and all performance indexes can reach the European and American biodiesel quality standard. The invention has the advantages of low production cost, high conversion rate and less pollutant discharge and overcomes the defect of preparation by a single method. When the biodiesel is produced, by-products comprise glycerol and methanol.

Description

technical field

[0001] The invention relates to a method for preparing biodiesel, in particular to a method for preparing biodiesel by using low-cost recovered oil from kitchen waste. Background technique

[0002] In recent years, the shortage of traditional non-renewable energy such as petroleum has become increasingly prominent, and the problem of energy shortage has become a major issue affecting the economy and national security. At the same time, the problem of environmental pollution caused by the use of petroleum fuels has become increasingly prominent, and the development of new clean alternative energy has become the focus of research in countries all over the world. Biodiesel is a petrochemical diesel substitute prepared from animal and vegetable oils and low-carbon fatty alcohols through transesterification. The main component is long-chain fatty acid monoester (methyl ester or ethyl ester), which is non-toxic and biodegradable It is an important renewable and cl...

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