Method for preparing biodiesel from illegal cooking oil, acid oil and waste animal and plant grease

Abstract

The invention relates to a method for preparing biodiesel from illegal cooking oil, acid oil and waste animal and plant grease. The method comprises the following steps: with the illegal cooking oil, the acid oil and the waste animal and plant grease as main raw materials, degumming and removing impurities, vaporizing to separate out heavy oil, and through catalytic cracking chemical decomposition reaction, processing macromolecular grease through catalytic cracking, molecular rearrangement, removal of carboxyl groups and an oxygen element and other reaction mechanisms so as to convert the animal and plant grease into the biodiesel which meets national standard requirements for gasoline and diesel in hydrocarbon molecular structural composition, condensation point, density, viscosity, cetane number and octane number and other technical indexes. The method is wide in application range; by the method, strong technical supports are provided for enterprises to simplify the production line, lower the production cost and the management cost and the technical level of the biodiesel is greatly improved; the quality of the prepared biodiesel is obviously higher than that of the existing biodiesel; therefore, the method has quite remarkable social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of bioenergy, in particular to a method for preparing biodiesel from waste oil, acidified oil, and waste animal and vegetable oils. Background technique [0002] The raw material for biodiesel extraction comes from automatic and vegetable oils, which are widely used in tractors, trucks, ships, etc. It refers to oil crops such as soybeans, rapeseed, cotton, palm, etc., wild oil plants and engineering microalgae and other aquatic vegetable oils, animal fats, and catering waste oils, etc. Renewable diesel fuel to replace petrodiesel. Biodiesel is a kind of biomass energy, which is a mono-alkyl ester of long-chain fatty acid obtained from biomass by pyrolysis and other technologies. Biodiesel is a mixture of complex organic components with high oxygen content. These mixtures are mainly organic compounds with large molecular weight, such as fatty acid methyl esters, cetane, octadecane, etc. Composite biodiesel...

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned processes are not common to each other, and the raw materials need to be classified into categories during production, and then the corresponding processes and equipment are used to produce according to different raw materials, resulting in cumbersome production lines, complicated production processes, high production and management costs, and biological products produced according to the above-mentioned processes. Diesel is generally of poor quality

At present, there is no method for preparing biodiesel that can be simultaneously applied to waste oil, acidified oil, and waste animal and vegetable oils

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