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Novel organic silicon defoamer for landfill leachate treatment and preparation method of novel organic silicon defoamer

A technology of silicone defoamer and landfill leachate, which is applied in the field of defoamers, can solve the problems of affecting the defoaming effect of defoamers, demulsification, poor stability, etc. Foam suppression effect

Active Publication Date: 2021-03-16
沈阳瑞驰表面技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the stability of the silicone defoamer is not good, demulsification and precipitation will occur under high temperature or high alkali environment. When the emulsifier after demulsification accumulates a lot, it is easy to block the pipeline, delivery pump and filter screen
Currently, the evaporation concentration system used for landfill leachate treatment usually operates at a temperature of 100-120°C, which is extremely high. The existing silicone defoamer is particularly prone to demulsification, which not only seriously affects the defoaming effect of the defoamer, but also emulsifies Agents and silicone oil will also affect the stability of the system and the quality of effluent water

Method used

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  • Novel organic silicon defoamer for landfill leachate treatment and preparation method of novel organic silicon defoamer
  • Novel organic silicon defoamer for landfill leachate treatment and preparation method of novel organic silicon defoamer

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Embodiment 1

[0020] A new type of silicone defoamer for landfill leachate treatment, which is made of the following raw materials in parts by weight: 12 parts of polyether-modified polydimethylsiloxane with a viscosity of 600mPa.s; 2 parts of silicon, whose particle size is 15nm; 3 parts of amino-modified silicone oil; 3 parts of fatty acid polyoxyethylene ester, whose HLB value is 6.5; 5 parts of fatty alcohol polyoxyethylene ether; 2 parts of hydroxymethyl cellulose; 1 part of acid salt; 72 parts of deionized water.

Embodiment 2

[0022] A new type of silicone defoamer for landfill leachate treatment, which is made of the following raw materials in parts by weight: 18 parts of polyether-modified polydimethylsiloxane with a viscosity of 1200mPa.s; 4 parts of silicon, whose particle size is 20nm; 4 parts of epoxy modified silicone oil; 5 parts of polyoxyethylene fatty acid ester, whose HLB value is 9; 6 parts of propylene glycol block polyether; 4 parts of carbomer resin; 2 parts of quaternary ammonium salt parts; deionized water is 57 parts.

[0023] A method for preparing the organosilicon defoamer for the novel landfill leachate treatment of the above-mentioned embodiments, comprising the following steps:

[0024] Add polyether-modified polydimethylsiloxane, nano-scale fumed silica, and modified silicone oil into the reaction kettle, raise the temperature to 100-150°C, stir and react for 1-3h, and wait to cool to 40-50°C Finally, add fatty acid polyoxyethylene ester, stir for 30-40min to mix until uni...

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Abstract

A novel organic silicon defoamer for landfill leachate treatment is prepared from the following raw materials in percentage by mass: 10-20% of polyether modified polydimethylsiloxane with the viscosity of 500-1500 mPa.s; 1-5% of nanoscale fumed silica with the particle size of 10-30 nm; 1-5% of modified silicone oil; 2-8% of fatty acid polyoxyethylene ester with the HLB value of 6-12; 3-10% of anemulsifier; 1-6% of a thickening agent; 1-2% of a biological inhibitor; and the balance of deionized water. The organic silicon defoamer for landfill leachate treatment not only has the characteristics of rapid defoaming and good foam inhibition, but also can resist the high temperature of 100-120 DEG C, and is not easy to demulsify and separate out in a complex organic matter system.

Description

technical field [0001] The invention belongs to the technical field of defoamers, in particular to a novel silicone defoamer for landfill leachate treatment and a preparation method thereof. Background technique [0002] Landfill leachate is high-concentration organic wastewater brought by precipitation and garbage itself in landfills. It has complex organic components, high BOD and COD values, high ammonia nitrogen content, and large changes in water quality and quantity. If it is not treated, it will be discharged directly. , will cause serious pollution to the environment. At present, there are many treatment methods for landfill leachate, which are mainly divided into physical and chemical treatment, biochemical treatment and land treatment. Physicochemical treatment mainly includes activated carbon adsorption, coagulation sedimentation, advanced oxidation, electrolysis and membrane treatment, etc. Biochemical treatment mainly includes anaerobic and aerobic treatment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0409B01D19/0404Y02W10/10
Inventor 朱晓萍金佳惠陈爽
Owner 沈阳瑞驰表面技术有限公司
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