Method for preparing mold lubricant through oxidation modification of waste engine oil

Abstract

The invention discloses a method for preparing a mold lubricant through oxidation modification of waste engine oil. The method comprises the following steps: adding 100 parts by weight of the waste engine oil and 0.3-0.5 part by weight of nanometer manganese dioxide or potassium permanganate into a reaction kettle, heating the obtained mixture to 100-120 DEG C, stirring and emulsifying the heated mixture to evaporate water, reducing the stirring rate and heating the emulsified mixture to 180-200 DEG C, carrying out full aeration with the aeration rate every minute being 2-3 times the volume of the reaction kettle, carrying out a reaction for 5 h, determining the acid value of the obtained reaction product to obtain 210-220 KOH mg / g, cooling the reaction product to 80 DEG C, adding triethanolamine or an aqueous solution of sodium bicarbonate to adjust the pH value of the reaction product to 9, adding a hydrophilic nonionic surfactant accounting for 1-5% of the total weight of the reaction product, adding deionized water with the weight 2-3 times the weight of the waste engine oil, and keeping the temperature at 70-80 DEG C to obtain the mold lubricant. The method has the advantages of simple process, environmental protection, good economic benefit, and good market competition advantage.

Description

technical field [0001] The invention belongs to the technical field of resource recycling of waste machine lubricating oil (hereinafter referred to as waste machine oil) and synthesis of a release agent, and specifically relates to a method for preparing a release agent by oxidative modification of waste machine oil. Background technique [0002] Automobiles, ships, motorcycles and other vehicles, as well as machinery powered by internal combustion engines, consume a large amount of oil every year. Engine oil can reduce the wear and tear of machine parts, ensure the normal operation of the machine, and prolong the service life of the machine. Engine oil will oxidize under high temperature and extreme pressure, and produce various oxidation intermediate products, colloids and other impurities. In addition, the mixing of mechanical impurities and fuel The dilution of engine oil makes the content of colloid, asphalt, organic acid and mechanical impurities in the engine oil cont...

AI Technical Summary

Problems solved by technology

First of all, during the recycling process, a large number of components oxidized into acidic components, ultra-fine carbon deposits and impurity powders are often not properly used to create profits or even discarded to pollute the environment. The pollution degree of waste engine oil recycling is far less than that of non-recycling The degree of pollution caused, the problem after recycling must also be properly resolved

Secondly, all recycling processes have a long recycling cycle, high investment in land occupation equipment, high manpower and energy consumption, poor sanitation and safety in the production area, and a large amount of difficult-to-treat wastewater and waste residues; finally, the recovered products can only be recycled. Used to make low-value oil products, the profit is not high, and the oil products with low recovery rate have lower profit or even negative profit

[0005] In addition, waste engine oil is also used for incineration. This kind of utilization method has lower economic value and more serious environmental pollution.

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