Method for producing epoxy fatty acid methyl ester by using illegal cooking oil

Abstract

The invention relates to a method for producing epoxy fatty acid methyl ester by using illegal cooking oil, which comprises: subjecting illegal cooking oil and methanol to esterification to obtain fatty acid methyl ester; purifying the fatty acid methyl ester by molecular distillation and performing epoxidation; and subjecting the obtained crude fatty acid methyl ester to three-stage rectification to obtain three models of epoxy fatty acid methyl ester. In the invention, illegal cooking oil is used as a raw material, and esterification is performed under normal pressure; as the reaction temperature is higher than the boiling point of methanol, the methanol is gasified immediately upon contact with fat; and the methanol is uniformly, quickly and fully contacted with the fat, so the esterification speed is further improved. When the method is used, the illegal cooking oil waste is utilized, cost is saved, environment is protected, energy consumption is low, process is simple, operation is safe and product quality is high. Therefore, the method is a resource-saving and environment-friendly production method. The epoxide number of the obtained No.1 epoxy fatty acid methyl ester is 4.0to 5.0, the plasticizing effect of the epoxy fatty acid methyl ester is desirable, the acid value is smaller than 1, the saponification of plasticized products is avoided, a flashing point is above 180 DEG C, an iodine value is smaller than 3, and the epoxy fatty acid methyl ester passed the verification of quality supervision and inspection departments and are approved to be qualified.

Description

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AI Technical Summary

Benefits of technology

This patented inventor describes an improved way to produce esters from waste oils that are difficult or expensive to dispose off due to environmental concerns such as pollution caused during disposal processes. By carrying this residue through another step called recycloning it becomes more cost-effective because fewer chemical products have been added compared to traditional methods like adding other materials at once. Additionally, there're no harmful side effects associated with current techniques involving heating them up again when new ones start reacting instead of just starting one round each time. Overall, these technical improvements improve efficiency and reduce emissions while producing valuable compounds.

Problems solved by technology

The technical problem addressed by this patented technology relates to finding an environmentally friendly alternative material that can replace traditional chemicals used in industry without causing harm or pollution concerns over them. This would be particularly useful if it could also provide various beneficial properties like flexibility, durability against wear, opticality, etc., along with being economically feasible compared to current alternatives made from petrochemistry products.