Comprehensive circulation utilization-regeneration method of various waste and old epoxy paints

Abstract

The invention belongs to the technical field of paint recovery and regeneration, and specifically relates to a comprehensive circulation utilization-regeneration method of various waste and old epoxypaints. The method comprises following steps: separating waste and old paints containing epoxy components from other articles; then adding collected waste and old paints into an enclosed container; then adding a mixed solvent composed of cyclohexanone, n-butyl alcohol, and ethyl carbonate, soaking paints for 4 hours; dispersing and stirring the solvent at a rotation speed of 300 r / min, automatically controlling the temperature in a range of 80 to 110 DEG C, separating solids and residual coatings generated by contacting the paints with water, oil, air, and a curing agent by an enclosed automatic fine filter screen facility; carrying out index tests; according to the requirements, adding various resins and solid phenolic resin; and finally adding various auxiliary agents in sequence to balance various performance indexes of the epoxy anticorrosive paint. The provided regeneration technology is simple, the cost of the finished product is low, a large amount of waste and old epoxy paintsand overstocked products is adopted, the collection is convenient, and the resource waste is reduced.

Description

technical field [0001] The invention belongs to the technical field of paint recovery and regeneration, and in particular relates to a method for comprehensive recycling and regeneration of various waste epoxy paints. Background technique [0002] With the rapid development of my country's industrial projects, people's living standards are improving day by day. Wastes such as industrial and civil wastes and garbage products have exploded, and the amount of waste generated is huge. [0003] Only the paint that we are familiar with, after consulting the data, the hazardous waste is about 53.47 million tons. According to incomplete statistics, only 300,000 tons of hazardous waste paint residues were produced in my country in 2017! [0004] In the production process of coatings, most of them involve resin synthesis, and use various chemical raw materials such as organic solvents and additives. At the same time, it also contains a large amount of various polymer organic compou...

AI Technical Summary

Problems solved by technology

If the paint residue and scrap paint containing these ingredients are not disposed of harmlessly or regenerated as resources, they will cause serious pollution to the environment and become an "environmental cancer"

[0005] Used in shipyards, oil refineries, power plants, chemical plants and other scrapped and invalid epoxy heavy-duty coating equipment and steel structures, all kinds of epoxy heavy-duty coatings used in protective coating are unqualified or expired and scrapped Products account for a large part of the product. If they are not recycled and discarded directly, it will not only cause waste of resources, but also be inconsistent with the current theme of the era, which has become a distinct theme of environmental protection and green development. Environmental pollution control is not only the top priority of environmental protection work, but also The basic guarantee of green development promotes the industry to embark on the track of benign and sustainable development, and finally achieves a great improvement and improvement of environmental quality. Therefore, these discarded unqualified or expired coating products are recycled, processed, modified, and comprehensively recycled. Regeneration, turning waste into treasure is a significant task

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