Technique for regenerating waste solvent paint

A technology of waste solvent and process, which is applied in the field of waste solvent paint regeneration process, can solve the problems of waste of resources and other problems, and achieve the effect of high pass rate and scientific and reasonable regeneration method

Active Publication Date: 2008-04-30
徐友志
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no method in the prior art that can safely and effectively recycle waste paint, resulting in a large waste of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1. A regeneration process for waste solvent paint, the steps are as follows:

[0027] (1) Classify the waste solvent paint after coating construction according to its base material composition and color, and then put the waste solvent paint of the same composition and color in the flash tower, and fractionally distill the high polarity paint with a distillation range within 150 °C The solvent is stored in a tank for later use; the residue is filtered through a 40-mesh screen to remove impurities to obtain waste paint;

[0028] (2) drop the waste paint of the same hue of step (1) gained in the jacketed distillation still, drop into solvent simultaneously, the weight ratio of waste paint and solvent is 1: 0.05; Then the material in the still is heated, When the temperature of the material reaches 40°C, start the agitator in the distillation kettle to stir, stop heating and stirring when the temperature of the material reaches 100°C, keep it warm for 1 hour, and d...

Embodiment 2

[0032] Example 2. A regeneration process for waste solvent paint, the steps are as follows:

[0033] (1) Classify the waste solvent paint after coating construction according to its base material composition and color, and then put the waste solvent paint of the same composition and color in the flash tower, and fractionally distill the high polarity paint with a distillation range within 150 °C The solvent is stored in a tank for later use; the residue is filtered through a 60-mesh sieve to obtain waste paint;

[0034] (2) drop the waste paint of the same hue of step (1) gained in the jacketed distillation still, drop into solvent simultaneously, the weight ratio of waste paint and solvent is 1: 0.15; Then the material in the still is heated, When the temperature of the material reaches 60°C, start the agitator in the distillation kettle to stir, stop heating and stirring when the temperature of the material reaches 120°C, keep it warm for 4 hours, and distill the moisture i...

Embodiment 3

[0038]Example 3. A regeneration process for waste solvent paint, the steps are as follows:

[0039] (1) directly take the waste paint of the same hue from the manufacturing industry and put it into a jacketed still, and simultaneously put in a solvent. The weight ratio of the waste paint to the solvent is 1:0.05; then heat the material in the still, and when the material After the temperature reaches 40°C, start the agitator in the distillation kettle to stir, stop heating and stirring when the temperature of the material reaches 100°C, keep it warm for 1 hour, and distill the water in the material through the tube condenser at the same time; until no water is distilled Start stirring again, open the valve to discharge the material, and pass through a 60-mesh sieve to obtain paint material A, and save the filter residue A separately;

[0040] (2) paint material A is put into ball mill, start ball mill 2 hours, shut down, drop into the highly polar solvent of step (1) gained, ...

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PUM

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Abstract

The invention provides a regeneration process for waste solvent paint, and is the process that waste solvent paint from coating construction or waste paint from the manufacturing industry is taken as raw material and is recovered and regenerated into qualified solvent paint through the certain processing steps. The waste paint from the manufacturing industry and the coating construction can be effectively recovered by the method of the invention, the regeneration method is scientific and reasonable, the qualification rate of regeneration products is high, and the regeneration process does not fundamentally generate the three wastes.

Description

technical field [0001] The invention relates to a paint recovery and regeneration process, in particular to a waste solvent paint regeneration process. Background technique [0002] Paint is a common name for paint, which has a wide range of uses. At present, the annual output of coatings in my country is about 1.8 million tons, which is divided into 17 categories and more than 1,000 varieties, ranking fourth in the world. During the manufacture and application of paint, a lot of waste and waste paint will be produced. The waste paint contains flammable and explosive substances, which is not safe and pollutes the environment. The waste paint from the paint manufacturing industry is generally a paste of mixed colors and particularly viscous. Generally, it can be divided into three types according to the hue: red, black, and gray. The waste paint also contains film-forming substances, pigments and additives. and other effective substances. The waste solvent paints generated...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/00B05B15/04C09D201/00
CPCY02P70/10
Inventor 徐友志
Owner 徐友志
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