Preparation method of special plasticizer for plastic casing of power distribution equipment

Abstract

A preparation method of a special plasticizer for a plastic casing of power distribution equipment comprises steps as follows: 1), recovered gutter oil and formic acid are added to a reaction kettle, ethanol is added through an elevated tank after feeding is finished, and a mixer is started to mix the materials uniformly; 2), a steam valve is opened, the reaction kettle is heated, the temperature is kept for 80 min, the reaction kettle is started, the mixture is stirred for 40-50 min, and the reaction is stopped; 3), after the reaction, reactants are left to stand and layered, an upper oil separation substance is transferred to a fractionation kettle, the fractionation kettle is heated, and ethanol which is not reacted completely is recovered under normal pressure; 4), after recovery of ethanol, the fractionation kettle is heated to 90 DEG C and subjected to heat preservation for 6 h, then the mixture is left to stand again, an upper crude product is transferred to a kettle type rectifying tower and subjected to fractionation in a reflux ratio being 1:1, and a regenerated crude gutter oil product is obtained; 5), the regenerated crude gutter oil product is neutralized with pure alkali liquor and then washed to be neural, an oil layer is subjected to steam distillation after water removal, residual products are subjected to vacuum distillation, low-boiling-point substances and water are removed, filter pressing is performed, and the plasticizer is obtained.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of a special plasticizer for the plastic casing of power distribution equipment. Background technique [0002] my country is a big country in the production and consumption of edible oil. The annual consumption of edible oil is as high as 21 million tons, and nearly 8 million tons of waste oil (mainly including kitchen hog oil and commercial frying oil) are produced every year during its use. Most of these waste oils are waste oils formed after frying and frying of edible oils, among which are toxic and harmful substances such as aldehydes, acids and benzene derivatives (such as aflatoxin) with complex molecular structures. Substances that flow into the catering industry after illegal processing will cause great harm to people's health. But it is also a huge waste to discard such a huge resource because it is not edible. How to make non-edible use of...

AI Technical Summary

Problems solved by technology

However, the raw materials for the production of epoxidized soybean oil in the current process are mostly native natural oils, which have high cost and complicated operation, and are only used in high-end products, and it is still difficult to popularize and apply ordinary products.

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