Method for preparing spherical solid defoaming agent through micro-channel

A technology of solid defoamer and microchannel, which is applied in separation methods, chemical instruments and methods, liquid degassing, etc., can solve the problems of large particle size difference, high carrier density requirements, low yield, etc., and achieve excellent Anti-foam performance, reduce curing time, avoid the effect of intermittent operation

Active Publication Date: 2020-04-24
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is unavoidable that the two processes also have disadvantages: the agglomeration molding process is difficult to accurately control the ratio of materials, the mixing effect is difficult to guarantee, and the yield of the product after screening is low; the spray molding process has high energy consumption and low density of the carrier. High requirements and large differences in product particle size
At present, there is no related technical literature report on the use of chitosan microsphere carrier as the encapsulation material to encapsulate the defoamer actives, and the use of microfluidic technology to prepare solid defoamers

Method used

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  • Method for preparing spherical solid defoaming agent through micro-channel
  • Method for preparing spherical solid defoaming agent through micro-channel

Examples

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Comparison scheme
Effect test

preparation example Construction

[0021] The preparation example of oil phase defoamer composition

[0022] The oil phase defoamer composition A1 was prepared by using the silicone active material and octylphenol polyoxyethylene ether prepared by the technology in Example 1 of patent CN103804834B at a mass ratio of 1:1.

[0023] The oil phase defoamer composition A2 was prepared by using the organosilicon active material prepared by the patent CN103804834B Example 2 technology and the branched isomeric tridecyl fatty alcohol polyoxyethylene ether at a mass ratio of 1:10.

[0024] The oil phase defoamer composition A3 was prepared by using the silicone active material and polyoxyethylene laurate prepared by the technology of Example 3 of patent CN103804834B at a mass ratio of 10:1.

[0025] The oil phase defoamer composition A4 was prepared by using the silicone active material and sorbitan tristearate prepared by the technology in Example 4 of patent CN103804834B at a mass ratio of 3:8.

[0026] The oil phase...

Embodiment 1

[0038] First pump the water-phase chitosan solution B1 and the oil-phase defoamer composition A1, F into the microstructure channel with an inner diameter of 500 μm A=20μL / min, the flow rate ratio of the two is F B :F A =10:1, form a stable O / W emulsion; then pump into the oil phase emulsifier C1, the flow rate ratio F C :(F B +F A ) = 10:1, forming a stable O / W / O emulsion into the microchannel extension tube with an inner diameter of 700 μm, which is made of polyethylene. The emulsion was subjected to photoinitiated polymerization for 5 min under ultraviolet light irradiation. After the reaction, the solid and liquid are automatically separated, and the chitosan solid on the filter net is washed and dried to obtain the spherical chitosan-based solid defoamer G1.

Embodiment 2

[0040] First, the water phase chitosan solution B2 and the oil phase defoamer composition A2, F are pumped into the microstructure channel with an inner diameter of 10 μm A =5μL / min, the flow rate ratio of the two is F B :F A =5:1, forming a stable O / W emulsion; then pump into the oil phase emulsifier C2, the flow rate ratio F C :(F B +F A ) = 5:1, forming a stable O / W / O emulsion into a microchannel extension tube with an inner diameter of 200 μm, which is made of polypropylene. The emulsion was subjected to photoinitiated polymerization for 1 min under ultraviolet light irradiation. After the reaction, the solid and liquid are automatically separated, and the chitosan solid on the filter net is washed and dried to obtain the spherical chitosan-based solid defoamer G2.

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Abstract

The invention provides a method for preparing a spherical solid defoaming agent through a micro-channel. Three fluid components including an oil-phase defoamer composition, a water-phase chitosan solution and an oil-phase emulsifier are utilized; a double-T-shaped micro-channel device is used; an O / W / O emulsion is prepared by adopting a microfluid technology; photoinitiation technology is combined, and the continuous and uniform spherical chitosan encapsulated solid defoaming agent product is prepared; the wrapping performance of chitosan has slow release performance in the use process of thedefoaming agent, it is guaranteed that the defoaming agent has excellent foam inhibition performance in the later period, meanwhile, the continuous production process can be achieved through the microfluid technology, intermittent operation is avoided, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a method for preparing a solid defoamer. The defoamer belongs to the additive of fine chemicals, therefore, the present invention belongs to the technical field of fine chemicals. Background technique [0002] Defoamers can be divided into liquid defoamers and solid defoamers according to their forms. Solid defoamers are widely used in daily chemical, pharmaceutical, Food fermentation, paint, concrete, sewage treatment, petroleum processing and other industries. [0003] Solid defoamers are usually prepared from defoaming active ingredients and carriers through a specific molding process. The preparation process is mainly divided into agglomeration molding and spray molding. The agglomeration molding process is to mix and stir the active ingredients and the carrier, and prepare a solid defoamer with a certain granular shape by drying. This process has less loss of active substances, low energy consumption for production, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B01J19/12B01D19/04
CPCB01D19/0404B01J19/0093B01J19/123
Inventor 丁荣焦迎春黄伟曹添安东尼.K.达西
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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