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Preparation and use method of graphite antioxidant

A technology of antioxidant and graphite, which is applied in the field of preparation of graphite antioxidant, can solve problems such as excessive acidity, large environmental pollution, and difficult access, and achieve the effect of reducing loss

Pending Publication Date: 2021-10-08
KAIFENG CARBON CO LTD OF CHINA PINGMEI SHENMA GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation of graphite antioxidant and its use method, aiming at the shortcomings of the impregnated antioxidant for graphite products commonly used at present: such as not easy to enter the interior of graphite products, too strong acidity, large environmental pollution, and harmful to graphite products. Protection temperature is not high, etc., to provide a water-soluble, near-neutral graphite anti-oxidation impregnating agent preparation and use method, which can increase the anti-oxidation temperature of graphite products to 1000-1100 ℃

Method used

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Examples

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preparation example Construction

[0021] The present invention provides a technical scheme for the preparation of a graphite antioxidant and a method for using the same: the preparation of the graphite antioxidant comprises the following steps:

[0022] S1. Add 30-100 parts of alkoxysilane into the reaction kettle, and then add the aqueous solution of acetic acid, hydrochloric acid, etc., and the ratio of the aqueous solution of acetic acid, hydrochloric acid, etc. is 10-50 parts of acetic acid and hydrochloric acid dissolved in 100 parts of water, and stir well After obtaining the aqueous solution of acetic acid or hydrochloric acid;

[0023] S2. Slowly add a certain amount of water-soluble silane coupling agent dropwise on the basis of step S1, and the addition ratio of the water-soluble silane coupling agent is 40-100 parts, and it needs to be added dropwise while stirring;

[0024] S3, on the basis of step S2, add a certain amount of boric acid in batches, and the addition ratio is 20-60 parts, and it need...

Embodiment 1

[0032] At room temperature, add 8.915Kg of methyltriethoxysilane into the reaction kettle with reflux device, weigh 1Kg of acetic acid and add it to 6Kg of water to configure an acetic acid aqueous solution, and add the acetic acid aqueous solution to the reaction kettle under stirring, and stir 10min, then slowly and uniformly add 11.205Kg of 3-aminopropyltrimethoxysilane, the addition speed is 200g / min, the stirring speed is 50rpm, and then add 3Kg of boric acid in three batches, raise the temperature to 60°C, reflux and stir for 2h, and finally Raise the temperature to 70°C, stir and reflux for 3 hours, stop stirring and cool to room temperature to obtain a water-soluble boron-silicon antioxidant with a Ph of 5.5;

[0033] Completely immerse the graphite material that needs anti-oxidation treatment in the prepared water-soluble boron-silicon antioxidant, evacuate to -0.9Mpa in a vacuum container, keep it for 1h, break the vacuum, pressurize to 2Mpa, hold the pressure for 1h,...

Embodiment 2

[0035] At room temperature, add 12.01Kg of phenyltriethoxysilane into the reaction kettle with reflux device, weigh 3Kg of acetic acid and add it to 8Kg of water to form an acetic acid aqueous solution, and add the acetic acid aqueous solution into the reaction kettle under stirring, and stir 10min, then slowly and uniformly add 22.27Kg of γ-glycidyl etheroxypropyltrimethoxysilane at a rate of 380g / min, stirring at 60rpm, then add 4Kg of boric acid in three batches, heat up to 55°C, and stir under reflux 2h, finally raised the temperature to 70°C, stirred and refluxed for 2h, stopped stirring and cooled to room temperature to obtain a water-soluble boron-silicon antioxidant, the antioxidant Ph is 3.2;

[0036] Completely immerse the graphite material that needs anti-oxidation treatment in the prepared water-soluble boron-silicon antioxidant, evacuate to -0.9Mpa in a vacuum container, keep it for 1h, break the vacuum, pressurize to 2Mpa, hold the pressure for 1h, and release the...

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Abstract

The invention discloses a preparation method and a use method of a graphite antioxidant, belonging to the technical field of graphite antioxidants. The preparation method of the graphite antioxidant comprises the following step: S1, adding 30-100 parts of alkoxy silane into a reaction kettle, and then adding an aqueous solution of acetic acid, hydrochloric acid and the like, wherein the aqueous solution of acetic acid, hydrochloric acid and the like is prepared by dissolving 10-50 parts of acetic acid, hydrochloric acid and the like in 100 parts of water and then conducting uniform stirring. The boron / silicon-based antioxidant can be completely dissolved in water, a common organic solvent is not adopted, and no VOCs are discharged when the antioxidant is used; the antioxidant is faintly acid or neutral, so corrosion to a reaction container or other steel and the like is basically avoided; and after a graphite material is soaked or brushed with the antioxidant, a network structure such as Si-O-B-O-C can be formed through heat treatment, so pores or active sites of the graphite material can be better protected, and the anti-oxidation temperature of the graphite material is increased to 1000-1100 DEG C.

Description

technical field [0001] The invention relates to a graphite antioxidant, in particular to a preparation method of a graphite antioxidant and a method for using the same. Background technique [0002] Graphite materials have the advantages of corrosion resistance, self-lubrication, high temperature resistance, etc., and are widely used in national production and life. [0003] However, graphite materials will be quickly oxidized by oxygen when used under aerobic conditions exceeding 400°C, which will cause excessive loss of graphite materials at high temperatures, reduce service life, and cause a lot of waste. Therefore, graphite materials need to be heated at high temperatures. , When used under aerobic conditions, it is necessary to carry out anti-oxidation treatment on graphite materials to reduce the loss of graphite materials and improve the service life of materials. [0004] At present, in the anti-oxidation treatment of graphite materials, silica sol, water-soluble ph...

Claims

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Application Information

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IPC IPC(8): C04B41/87
CPCC04B41/5053C04B41/87C04B41/009C04B35/52C04B41/4554C04B41/0072
Inventor 吴沣姜鹏杨家山程雅琳梁冉徐艳丽李红涛侯磊许明哲范振春屈亚飞刘坤洋
Owner KAIFENG CARBON CO LTD OF CHINA PINGMEI SHENMA GRP
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