A kind of method that microchannel prepares spherical solid defoamer

A solid defoamer, microchannel technology, applied in separation methods, chemical instruments and methods, liquid degassing and other directions, can solve the problems of large particle size difference, low yield, high carrier density requirements, etc., to avoid intermittent Operation, improve production efficiency, the effect of excellent foam suppression performance

Active Publication Date: 2021-04-30
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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  • A kind of method that microchannel prepares spherical solid defoamer
  • A kind of method that microchannel prepares spherical solid defoamer

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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 defoamer through a microchannel, using three fluid components of an oil phase defoamer composition, a water phase chitosan solution and an oil phase emulsifier, through a double T-shaped microchannel device , using microfluidic technology to prepare O / W / O emulsion, combined with photoinitiation technology, to prepare continuous and uniform spherical chitosan-encapsulated solid defoamer products, the encapsulation performance of chitosan, in the process of defoamer use, It has slow release performance, which ensures that the defoamer has excellent antifoam performance in the later stage. At the same time, microfluidic technology can realize continuous production process, avoid intermittent operation and improve production efficiency.

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 Patents(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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