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Compounded antifoamer, preparation method therefor and application of compounded antifoamer

A defoamer and thickener technology, which is applied in the field of compound defoamer and its preparation, can solve the problems of low desulfurization efficiency of desulfurizer, unfavorable regeneration of desulfurizer, and poor ability to suppress foam, so as to reduce solution loss and reduce High, absorption-friendly effect

Inactive Publication Date: 2019-11-01
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defoamer in the prior art that has poor foam suppression ability, resulting in low desulfurization efficiency of the desulfurizer and being unfavorable for the regeneration of the desulfurizer, thereby providing a defoamer with strong defoaming ability A compound defoamer that can improve the desulfurization efficiency and regeneration efficiency of the desulfurizer

Method used

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  • Compounded antifoamer, preparation method therefor and application of compounded antifoamer

Examples

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Embodiment 1

[0026] This embodiment provides a compound defoamer, and its preparation method includes the following steps:

[0027] Mix 10g sodium carboxymethylcellulose and 330g deionized water uniformly to obtain an aqueous thickener solution; at 45°C, mix 5g perfluorosilicone oil, 5g polyether, 40g dimethyl silicone oil, 20g nano silicon dioxide, and 20g Mix pan 60, 20g Tween 60 and 550g deionized water, stir for 1h to make the dispersion uniform, then slowly add the above thickener aqueous solution to it, stir at 70℃ at high speed until a uniform mixture is obtained, keep stirring for 2h, stop Stir and cool to room temperature to obtain the compound defoamer.

Embodiment 2

[0029] This embodiment provides a compound defoamer, and its preparation method includes the following steps:

[0030] Mix 10g of guar gum and 290g of deionized water uniformly to obtain a thickener aqueous solution; at 45°C, 10g of high phenyl silicone oil, 10g of polyether modified siloxane, 10g of fluoroether modified siloxane, 70g portion Low-hydrogen silicone oil, 20g nano-silica, 20g Span 80, 20g Tween 80 and 540g deionized water are mixed, stirred for 1h to make the dispersion uniform, and then slowly add the above thickener aqueous solution to it, at a high speed at 70℃ Stir until a uniform mixture is obtained, continue to keep stirring for 2 hours, stop stirring, and cool to room temperature to obtain the compound defoamer.

Embodiment 3

[0032] This embodiment provides a compound defoamer, and its preparation method includes the following steps:

[0033] Mix 10g sesame gum and 290g deionized water uniformly to obtain a thickener aqueous solution; at 45°C, 20g fluoroether modified siloxane, 10g polyether, 60g dimethyl silicone oil, 20g nano silica, 20g Laureth polyoxyethylene ether, 20g alkylphenol polyoxyethylene ether and 550g deionized water are mixed, stirred for 1 hour to make it uniformly dispersed, then slowly add the above-mentioned thickener aqueous solution to it, and stir at high speed at 70°C until uniform mixing is obtained Liquid, continue to keep stirring for 2 hours, stop stirring, and cool to room temperature to obtain the compound defoamer.

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Abstract

The invention relates to the technical field of desulfurization treatment and discloses a compounded antifoamer, a preparation method therefor and an application of the compounded antifoamer. The compounded antifoamer comprises the following ingredients in parts by weight: 5-10 parts of active component, 2-6 parts of emulsifier, 1-5 parts of nano-silica, 0.5-2 parts of thickener and 77-91.5 partsof deionized water, wherein the active component is prepared through mixing at least two of polyether, siloxane and modified siloxane. According to the compounded antifoamer disclosed by the invention, the height of a foam layer is reduced greatly, and the problems of desulfurizing agent solution loss and desulfurizing agent desulfurization efficiency decrease caused by foam entraining are solved.In addition, discovered by experiments, the compounded antifoamer disclosed by the invention can be further used for improving adsorption capacity of a desulfurizing agent to hydrogen sulfide and promoting recovery of consumed dissolved oxygen in a solvent system, and the increase of dissolved oxygen is beneficial to regeneration of the desulfurizing agent, so that the desulfurization efficiencyof the desulfurizing agent is further effectively increased.

Description

Technical field [0001] The invention relates to the technical field of desulfurization treatment, and in particular to a compound defoaming agent and its preparation method and application. Background technique [0002] Today, H is produced or released in processes such as petrochemical refining, natural gas mining, and biogas development. 2 S. H 2 S is a flammable acidic gas. When mixed with air in a certain proportion, it will form an explosive gas. It is flammable and explosive when exposed to an open flame. When mixed with water vapor entrained and generated in industrial processes, it will corrode metal pipelines and testing equipment, and some H 2 S to SO 2 It will further corrode the equipment and cause blockage. In addition, H 2 S is also a strong neurotoxin. Inhalation of small amounts of high concentrations of H 2 S can be fatal in a short time, while low concentrations of H 2 S has adverse effects on the eyes, respiratory system and central nervous system....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04B01D53/80B01D53/50B01D53/52
CPCB01D19/0409B01D19/0463B01D53/50B01D53/523B01D53/80
Inventor 易玉峰黄龙赵文涛高乐
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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