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Method for treating unsaturated polyester resins wastewater

A polyester resin, unsaturated technology, applied in the field of treating unsaturated polyester resin production wastewater to make it effective, can solve the problems of secondary pollution, long cycle, high cost of chemical treatment, etc., to improve quality and improve water reduction rate effect

Active Publication Date: 2009-05-27
莒县东辉建筑工程有限公司
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AI Technical Summary

Problems solved by technology

The cost of chemical treatment is high and the cycle is long, and it is easy to cause secondary pollution if the treatment is not good
The combustion method requires a special incinerator, polluting the atmosphere

Method used

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  • Method for treating unsaturated polyester resins wastewater

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Experimental program
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Effect test

Embodiment Construction

[0007] At present, the industrial production process of naphthalene-based water reducer is roughly as follows:

[0008] 1. Mix a certain amount of industrial naphthalene and concentrated sulfuric acid in proportion, and carry out sulfonation reaction at 160-165°C;

[0009] 2. Add waste water containing low molecular weight alcohol and acid produced in the production of unsaturated polyester resin to the reaction product, carry out hydrolysis reaction at 120-125°C, add 250-300Kg of the waste water for every 10 tons of water reducing agent produced ;

[0010] 3. Add formaldehyde to the reaction product of the previous step and the waste water containing low molecular weight alcohol and acid produced in the production of unsaturated polyester resin, and carry out condensation reaction at 90-110°C. For every 10 tons of water reducing agent produced, add the Wastewater 150-200Kg;

[0011] 4. Add lye to the reaction product of the previous step to carry out neutralization reaction...

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Abstract

The invention discloses a method for treating unsaturated polyester resin wastewater. A production method for a naphthalene system high efficiency water reducing agent comprises the steps of sulfonation, hydrolysis, condensation, neutralization, drying, and the like. The method is characterized in that concerning the hydrolysis link of the production process of the naphthalene system high efficiency water reducing agent, the wastewater which is produced in the production process of unsaturated polyester resin and contains alcohol with low molecular weight is added as reaction water and participates in the whole process of hydrolysis, condensation, neutralization and drying. When the wastewater is treated, the alcohol with low molecular weight and acid takes part in the condensation reaction of the NF high-efficiency water reducing agent, thereby bringing about a certain amount of functional groups and improving the water reducing rate of the NF high efficiency water reducing agent.

Description

Technical field: [0001] The invention belongs to the technical field of waste water treatment, in particular to a method for treating waste water produced by unsaturated polyester resin to make it effective. Background technique: [0002] At present, the industrial treatment of unsaturated polyester resin wastewater containing alcohol and acid generally uses complex chemical water treatment processes or direct combustion. Both methods have significant disadvantages. The cost of chemical treatment is high and the cycle is long, and it is easy to cause secondary pollution if the treatment is not good. The combustion method requires a special incinerator, which pollutes the atmosphere. Invention content: [0003] In order to solve the problems existing in the prior art, the present invention provides a method for treating unsaturated polyester resin wastewater. The method does not need equipment under specific conditions, the process is simple, the resin wastewater is compl...

Claims

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Application Information

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IPC IPC(8): C02F1/00
Inventor 朱宗君
Owner 莒县东辉建筑工程有限公司
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