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Preparation method of phenolic resin microspheres

A technology of phenolic resin and microspheres, which is applied in the field of preparation of phenolic resin microspheres, can solve the problems of a large amount of ethanol and high temperature curing environment, difficulty in controlling the diameter of resin microspheres, and difficulty in achieving large-scale production. Controllable, reducing the difficulty and risk of curing, and conducive to the effect of mass production

Pending Publication Date: 2021-10-01
SHANGHAI OUYANG SYNTHETIC MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are multiple methods for preparing phenolic resin microspheres. For example, in the preparation methods disclosed in the patent documents CN98118911.3 and CN98115717.3, the novolac resin and curing agent are used to mix and then crush, Dispersion and high-temperature curing to form resin microspheres is a cumbersome process and high cost; although the preparation method disclosed in the patent document CN200410012346.X simplifies the pulverization process, it still requires a large amount of ethanol and a high-temperature curing environment, resulting in The diameter of the microspheres is difficult to control; the patent documents CN200910200119.2 and CN201110329424.9 disclose the preparation of phenolic resin microspheres requires high speed and ultra-high temperature curing, and it is difficult to achieve large-scale production
In summary, the existing methods for preparing phenolic resin microspheres are either cumbersome and costly, or require high temperature curing, making it difficult to produce on a large scale

Method used

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  • Preparation method of phenolic resin microspheres
  • Preparation method of phenolic resin microspheres
  • Preparation method of phenolic resin microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, the raw and auxiliary materials are placed in a reactor for stirring and mixing to obtain a homogeneous solution of phenolic formaldehyde. Wherein, the weight ratio of each component in the raw and auxiliary materials is as follows: 100 parts by weight of phenolic formaldehyde, 35 parts by weight of formaldehyde, 5 parts by weight of alkaline curing agent, 5 parts by weight of surfactant and 600 parts by weight of solvent water. When stirring and mixing the raw and auxiliary materials, the stirring and mixing speed is 150 rpm, the stirring and mixing time is 30 minutes, the stirring and mixing temperature is 60° C., and the reaction pressure in the reactor is normal pressure.

[0020] Next, add the basic catalyst KOH to the phenolic homogeneous solution to obtain an alkaline mixed solution, adjust the reaction temperature of the mixed solution to 80°C, and the pH to 11, and stir and mix in the reactor at a stirring speed of 300 rpm Liquid, and keep the reaction p...

Embodiment 2

[0026] First, the raw and auxiliary materials are placed in a reactor for stirring and mixing to obtain a homogeneous solution of phenolic formaldehyde. Wherein, the weight ratio of each component in the raw and auxiliary materials is as follows: 100 parts by weight of phenolic formaldehyde, 40 parts by weight of formaldehyde, 4 parts by weight of alkaline curing agent, 10 parts by weight of surfactant and 500 parts by weight of solvent water. When stirring and mixing the raw and auxiliary materials, the stirring and mixing speed is 180 rpm, the stirring and mixing time is 20 minutes, the stirring and mixing temperature is 70° C., and the reaction pressure in the reactor is normal pressure.

[0027] Next, add the basic catalyst NaOH to the phenolic homogeneous solution to obtain an alkaline mixed solution, adjust the reaction temperature of the mixed solution to 80°C, and the pH to 11, and stir and mix in the reactor at a stirring speed of 400 rpm Liquid, and keep the reaction...

Embodiment 3

[0031] First, the raw and auxiliary materials are placed in a reactor for stirring and mixing to obtain a homogeneous solution of phenolic formaldehyde. Wherein, the weight ratio of each component in the raw and auxiliary materials is as follows: 100 parts by weight of phenolic formaldehyde, 45 parts by weight of formaldehyde, 3 parts by weight of alkaline curing agent, 5 parts by weight of surfactant and 900 parts by weight of solvent water. When stirring and mixing the raw and auxiliary materials, the stirring and mixing speed is 200 rpm, the stirring and mixing time is 10 minutes, the stirring and mixing temperature is 80° C., and the reaction pressure in the reactor is normal pressure.

[0032] Next, the basic catalyst K 2 CO 3 Add it to the phenolic homogeneous solution to obtain an alkaline mixed solution, adjust the reaction temperature of the mixed solution to be 85 ° C, and the pH to be 9, and stir the mixed solution in the reactor at a stirring speed of 400 rpm, and...

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Abstract

The invention relates to the technical field of spherical activated carbon preparation, in particular to a method for preparing phenolic resin microspheres. In order to realize large-scale production of phenolic resin microspheres and reduce the production cost, the invention provides a preparation method of phenolic resin microspheres, which comprises the following steps: stirring and mixing phenol, formaldehyde, an alkaline curing agent, a surfactant and solvent water in a reactor to obtain a phenolic homogeneous solution; adding an alkaline catalyst into the phenolic homogeneous solution to obtain an alkaline mixed solution, adjusting the reaction temperature of the mixed solution to 70-95 DEG C, and stirring for condensation reaction to form phenolic resin oil drops; raising the reaction temperature of the mixed solution to reflux temperature, and continuously stirring to pre-cure the phenolic resin oil drops to form a phenolic resin microsphere matrix; and taking out the phenolic resin microsphere matrix, washing, filtering, and curing in a drying box to obtain the phenolic resin microsphere. According to the preparation method of the phenolic resin microspheres, the preparation cost can be reduced, large-scale production is facilitated, and large-scale production of the phenolic resin microspheres is realized.

Description

technical field [0001] The invention relates to the technical field of spherical activated carbon preparation, in particular to a method for preparing phenolic resin microspheres. Background technique [0002] Most commercially available activated carbons use coal or biological materials as carbon sources. However, this type of activated carbon not only has an irregular structure, but also has the disadvantages of wide distribution of voids and high ash content, and it is cumbersome to deal with after use. Micro-spherical activated carbon has the advantages of controllable shape, good rolling properties, high mechanical strength, large specific surface area and strong adsorption capacity, so micro-spherical activated carbon has great application potential in the fields of catalyst carrier, toxic gas adsorption and hemodialysis. [0003] At present, phenolic resin is often used as raw material and prepared into phenolic resin microspheres by suspension method, and then the ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10
CPCC08G8/10
Inventor 刘锟陈招王文浩杨小云杨银祖沐霖朱永茂
Owner SHANGHAI OUYANG SYNTHETIC MATERIAL SCI & TECH