Preparation method of defoaming agent for wastewater treatment

A waste water treatment and defoamer technology, which is applied in the direction of degassed water/sewage treatment, etc., can solve the problems of secondary pollution, increase of COD of waste water, etc., and achieve the goal of improving defoaming ability, long foam suppression time and improving dispersion performance Effect

Active Publication Date: 2015-12-16
SUZHOU JIMCEL ELECTRONICS NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The above-mentioned defoamers in the prior art are mainly due to the increase of the COD of the waste water after being used in large quantities, thereby causing secondary pollution

Method used

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  • Preparation method of defoaming agent for wastewater treatment

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preparation example Construction

[0030] A kind of preparation method of defoamer for waste water treatment of the present invention, its preparation steps are as follows:

[0031] 1) Modification of silicone oil

[0032] Mix hydrogen-containing silicone oil and polyether, and use Speier catalyst to obtain polyether-modified silicone oil, and protect the entire reaction system with inert gas;

[0033] 2) Preparation of silicone paste

[0034] Mix hydrophobic silica and dimethyl silicone oil, heat and stir to make translucent silicone paste;

[0035] 3) Compounding of defoamer

[0036] The polyether-modified silicone oil prepared in step 1), the silicone paste prepared in step 2), and the emulsification aid are mixed with water, and stirred at a high speed to obtain a defoamer for wastewater treatment.

Embodiment 1

[0038] 1) Mix 50 grams of hydrogen-containing silicone oil with a molecular weight of 5000 and 60 grams of polyether with an EO / PO ratio of 0.5, add 0.4 grams of Speier catalyst, and react at a reaction temperature of 200°C for 8 hours to obtain a polyether-modified silicone oil for later use. The whole reaction system is protected with an inert gas;

[0039] 2) Mix 20 grams of hydrophobic silica and 160 grams of dimethyl silicone oil, heat to 50°C and stir to make a translucent silicone paste;

[0040] 3) Mix 40 grams of polyether-modified silicone oil prepared in step 1), 150 grams of silicone paste prepared in step 2), 50 grams of emulsifying aid and 760 grams of water, and stir at a high speed to obtain a defoamer for wastewater treatment agent.

Embodiment 2

[0042] 1) Mix 50 grams of hydrogen-containing silicone oil with a molecular weight of 6000 and 65 grams of polyether with an EO / PO ratio of 0.6, add 0.45 grams of Speier catalyst, and react at a reaction temperature of 250°C for 9 hours to obtain a polyether-modified silicone oil for later use. The whole reaction system is protected with an inert gas;

[0043] 2) Mix 20 grams of hydrophobic white carbon black with 180 grams of dimethyl silicone oil, heat to 50°C and stir to make a translucent silicone paste;

[0044] 3) Mix 60 grams of the polyether-modified silicone oil prepared in step 1), 100 grams of the silicone paste prepared in step 2), 100 grams of emulsification aids and 740 grams of water, and stir at a high speed to obtain a defoamer for wastewater treatment agent.

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Abstract

The invention discloses a preparation method of a defoaming agent for wastewater treatment, and belongs to the field of water treatment agents. The preparation method of the defoaming agent comprises the following steps of organic silicone oil modification treating, silicone paste preparing and defoaming agent compounding. The defoaming agent is prepared by compounding the organic silicone oil which is good in chemical stability and is modified through polyether with silicone paste, emulsifying auxiliaries and the like. The defoaming agent is high in chemical stability and defoaming and anti-foaming capacity, capable of resisting strong acid and strong base, small in additive amount and long in anti-foaming time, and the COD of wastewater can not be increased, so that wastewater secondary pollution caused by defoaming agent adding can be avoided.

Description

technical field [0001] The invention belongs to the field of water treatment agents, and in particular relates to a preparation method of a defoamer for waste water treatment. Background technique [0002] In the process of wastewater treatment, it is easy to generate a large amount of foam, which needs to be eliminated in time. Generally, defoamers are added regularly. At present, defoamers are mainly divided into three categories: mineral oils, silicones, and polyethers. Ordinary defoamers have poor chemical stability, and the components in wastewater are complex, resulting in oil drift and short defoaming time of ordinary defoamers. [0003] In recent years, the research on defoamers has mainly focused on the compounding of organosilicon compounds and surfactants, the compounding of polyethers and silicones, the compounding of water-soluble or oil-soluble polyethers and silicon-containing polyethers, etc. Foam on. As far as the current defoamers are concerned, polyethe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/20
Inventor 刘鸣刘利娟孙宇亮
Owner SUZHOU JIMCEL ELECTRONICS NEW MATERIAL
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