Method for preparing environment-friendly plasticizer by recycling waste resources

Abstract

The invention belongs to the technical field of plasticizer preparation, and particularly relates to a method for preparing an environment-friendly plasticizer by recycling waste resources. The methodcomprises the following steps: S1, adding collected waste sunflower seed oil into a purification device to obtain purified waste oil; S2, adding the purified waste oil treated in the step S1 into a stirrer, and gradually adding a H2O2 solution with a mass fraction of 30% to obtain epoxidized waste oil; S3, sequentially carrying out alkali washing and water washing on the epoxidized waste oil obtained in the step S2, and controlling the pH value of a final oil-water mixture to be 7; and S4, taking an oil phase in the oil-water mixture treated in the step S3, carrying out reduced-pressure distillation, and removing water to obtain the final environment-friendly plasticizer. The preparation method is simple in process, and the prepared plasticizer is free of toxicity and harm, less in impurities, light in color and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of plasticizer preparation, and specifically relates to a method for recycling and utilizing waste resources to prepare an environment-friendly plasticizer. Background technique [0002] In daily life, edible oil always produces a large amount of waste oil after oil extraction, frying and grilling various foods. After the waste oil is produced, people often directly dump the waste oil on the garbage dump. It is difficult to clean up and cause pollution. At the same time, some unscrupulous merchants collect the discarded edible oil, and after simple filtration and deodorization treatment, it is circulated to people's tables again, which poses a great threat to people's health. Therefore, it is necessary to recycle waste oil to save resources and improve the reuse rate of waste resources. At the same time, through the recycling and reuse of waste oil, cut off the channel for recirculation of waste oil to food ...

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Problems solved by technology

[0004] There are also some technical solutions in the prior art, such as the Chinese patent with the application number CN201811415272.2, which includes a collection bucket, a first filter assembly, a second filter assembly, a third filter assembly, a heating device, a dosing device, Stirring device, the lower oil layer flows into the stirring device after being filtered by the first filter assembly, the second filter assembly, and the third filter assembly in sequence, and the middle oil layer flows into the stirring device after being filtered by the second filter assembly and the third filter assembly in sequence In the stirring device, the upper oil layer flows into the stirring device after being filtered by the third filter assembly, and an overflow port is provided at the upper oil surface in the stirring device. Stir and settle to obtain the purified oil, but in the process of filtering, it is only filtered by the gravity of the oil itself, and it is easy to block the filter screen and reduce the filtration speed under the action of the deposited impurities and the viscosity of the oil itself Or the filtration stops. At the same time, when the device is cleaned after being used for a period of time in this scheme, it is difficult to disassemble and it is not convenient for internal cleaning of the device.

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