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Preparation and application of an economical, environmentally friendly degradable paint mist coagulant

A paint mist coagulant and degradability technology, which is applied in the field of paint mist coagulant with high efficiency and viscosity loss of overspray paint and its preparation field, can solve the problems of incompetence, increased cost of treating wastewater, and no biodegradability, etc.

Active Publication Date: 2016-08-17
常立
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Melamine-formaldehyde polymer is low in production cost, simple in process, and has a good detackification effect on oversprayed paint in circulating water, so it is widely used as a paint mist coagulant, but the disadvantage of this type of product is that it contains excessive free formaldehyde
Because formaldehyde is a potential carcinogen that seriously endangers human health, many countries have gradually banned its use; although inorganic and organic polymer water treatment agents have certain treatment effects on water treatment, they do not have Biodegradability will increase the content of COD, BOD, etc. in the water body, causing serious secondary pollution to the water body; although the paint mist coagulant processed from bentonite has certain biodegradability, the raw material mainly depends on Imported from abroad, and the price is high, which increases the cost of wastewater treatment, which is not economical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh each raw material according to the following mass percentage: add tap water: 97.0% to the three-necked flask, place it in a constant temperature water bath for stirring;

[0038] Add cationic modified starch: 2.0%, and continue stirring to completely disperse the starch in tap water;

[0039] Turn on the switch of the constant temperature water bath and set the temperature at 80°C for heating;

[0040] After the temperature rises to the set temperature and stabilizes, time the starch solution in the three-necked flask to react for 40 minutes to obtain component I;

[0041] Add metal salt: 0.5% to component I, and continue to stir, so that the metal salt and component I are completely mixed to obtain component II;

[0042] Add an aqueous polymer solution with a concentration of 0.5% to component II: 0.5%, and continue to stir to completely mix the aqueous polymer solution and component II, and discharge to obtain the product.

Embodiment 2

[0044] Weigh each raw material according to the following mass percentage: add tap water: 96.0% to the three-neck flask, place it in a constant temperature water bath for stirring;

[0045] Add cationic modified starch: 2.0%, and continue stirring to completely disperse the starch in tap water;

[0046] Turn on the switch of the constant temperature water bath and set the temperature at 80°C for heating;

[0047] After the temperature rises to the set temperature and stabilizes, time the starch solution in the three-necked flask to react for 40 minutes to obtain component I;

[0048] Add metal salt: 1.0% to component I, and continue to stir, so that the metal salt and component I are completely mixed to obtain component II;

[0049] Add an aqueous polymer solution with a concentration of 0.5%: 1.0% to component II, and continue to stir until the aqueous polymer solution and component II are completely mixed, and the product is discharged.

Embodiment 3

[0051] Weigh each raw material according to the following mass percentage: add tap water: 94.0% to the three-neck flask, place it in a constant temperature water bath for stirring;

[0052] Add cationic modified starch: 2.0%, and continue stirring to completely disperse the starch in tap water;

[0053] Turn on the switch of the constant temperature water bath and set the temperature at 80°C for heating;

[0054] After the temperature rises to the set temperature and stabilizes, time the starch solution in the three-necked flask to react for 40 minutes to obtain component I;

[0055] Add metal salt: 2.0% to component I, and continue to stir, so that the metal salt and component I are completely mixed to obtain component II;

[0056] Add an aqueous polymer solution with a concentration of 0.5%: 2.0% to component II, and continue to stir until the aqueous polymer solution and component II are completely mixed, and the product is discharged.

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Abstract

The invention provides an economic environment-friendly degradable paint mist flocculating agent. An employed raw material is cation modified starch (with the substitution degree of 1.0-2.5), and base starch of the modified starch is natural starch, therefore the raw material is easily available and low in cost, and also is biodegradable and free of secondary pollution to environment. The paint mist flocculating agent can enable different-resin-type paint to lose viscosity, and has relatively good broad-spectrum property. The invention also provides a preparation method of the paint mist flocculating agent. The paint mist flocculating agent is applicable to circulating water processing in a wet-type paint mist removing system.

Description

Technical field: [0001] The invention relates to the preparation and application of an economical, environment-friendly and degradable paint mist coagulant, in particular to a paint mist coagulant capable of effectively detackifying overspray paint in circulating water of a coating production line and a preparation method thereof. The product of the invention is characterized by economy, environmental protection and simple production process. The invention belongs to the technical field of industrial wastewater treatment. Background technique: [0002] When working in the paint shop, usually a large part of the paint cannot be applied to the workpiece and becomes overspray paint. Over time, these sticky overspray paint will accumulate on the walls, roof and bottom of the spray area, and will adhere to the equipment. If things go on like this, it will not only seriously pollute the surrounding air and environment, but also affect the treatment effect of the equipment and inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56
Inventor 常立石昌敏谢爱军高素萍
Owner 常立
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