Fe-Fe2O3/nitrogen-doped expanded graphite composite material for grease adsorption

A technology of fe-fe2o3 and expanded graphite, which is applied in the direction of fat oil/fat refining, fat production, alkali metal compounds, etc., can solve the problems of high processing cost and narrow application range, and achieve high specific surface area, cost saving and strong adsorption Effect

Inactive Publication Date: 2020-10-02
HANGZHOU XINKANG NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The invention provides a kind of Fe-Fe used for oil adsorption 2 o 3 The preparation method and application of nitrogen-doped expanded graphite composite materials, utilizing the advantages of large specific surface area and pore volume of expanded graphite, loading hydrated iron oxide particles into the pores of expandable graphite, and the obtained hydrated iron oxide / expandable graphite composite The material is calcined at high temperature under the protection of nitrogen atmosphere to obtain Fe-Fe 2 o 3 / Nitrogen-doped expanded graphite composite material is applied to oil adsorption treatment, which solves the shortcomings of high processing cost and narrow application range in the existing conventional technology

Method used

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  • Fe-Fe2O3/nitrogen-doped expanded graphite composite material for grease adsorption
  • Fe-Fe2O3/nitrogen-doped expanded graphite composite material for grease adsorption
  • Fe-Fe2O3/nitrogen-doped expanded graphite composite material for grease adsorption

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Effect test

Embodiment 1

[0026] (1) Preparation of expandable graphite: uniformly mix 3g of natural flake graphite and 0.75g of potassium permanganate, then add 15ml of concentrated nitric acid, stir the mixture at 40°C for 60min, and wash the product with deionized water after the reaction is complete Filter with suction, adjust the pH to neutral, and then dry in an oven at 60°C for 12 hours to obtain expandable graphite.

[0027] (2) Preparation of hydrated iron oxide / expandable graphite composite material: 0.05mol Fe(NO 3 ) 2 ·6H 2 The mixture of O and 0.05mol citric acid was dissolved in 60ml deionized water at room temperature, and the expandable graphite obtained in step (1) was added to the mixed solution after it was completely dissolved, and it was ultrasonically dispersed for 30min, and then added dropwise to the mixed solution under agitation. Add 4mol / l NaOH solution, and when the pH value reaches 13, dilute the mixed solution to 100ml. Air was introduced into the mixed solution with an...

Embodiment 2

[0030] (1) Preparation of expandable graphite: uniformly mix 3g of natural flake graphite and 0.5g of potassium permanganate, then add 18ml of concentrated nitric acid, stir the mixture at 60°C for 80min, and wash the product with deionized water after the reaction is complete Filter with suction, adjust the pH to neutral, and then dry in an oven at 60°C for 12 hours to obtain expandable graphite.

[0031] (2) Preparation of hydrated iron oxide / expanded graphite composite material: 0.04mol Fe(NO 3 ) 2 ·6H 2 The mixture of O and 0.05mol citric acid was dissolved in 60ml deionized water at room temperature, and the expandable graphite obtained in step (1) was added to the mixed solution after it was completely dissolved, and it was ultrasonically dispersed for 30min, and then added dropwise to the mixed solution under agitation. Add 4mol / l NaOH solution, and when the pH value reaches 13, dilute the mixed solution to 100ml. Air was introduced into the mixed solution with an ox...

Embodiment 3

[0034] (1) Preparation of expandable graphite: Mix 3g of natural flake graphite and 1.0g of potassium permanganate evenly, then add 21ml of concentrated nitric acid, stir the mixture at 60°C for 100min, and wash the product with deionized water after the reaction is complete Filter with suction, adjust the pH to neutral, and then dry in an oven at 60°C for 12 hours to obtain expandable graphite.

[0035] (2) Preparation of hydrated iron oxide / expandable graphite composite material: 0.03mol Fe(NO 3 ) 2 ·6H 2 The mixture of O and 0.04mol citric acid was dissolved in 60ml deionized water at room temperature, and the expandable graphite obtained in step (1) was added to the mixed solution after the dissolution was completed and ultrasonically dispersed for 30min, and then added dropwise to the mixed solution under agitation. Add 4mol / l NaOH solution, and when the pH value reaches 13, dilute the mixed solution to 100ml. Air was introduced into the mixed solution with an oxygen p...

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Abstract

The invention discloses a preparation method and application of an Fe-Fe2O3 / nitrogen-doped expanded graphite composite material for grease adsorption. Expandable graphite with a high expansion rate isused as a carrier material to be uniformly loaded on the surface of the expandable graphite together with ferric oxide hydrate, and the obtained ferric oxide hydrate / expandable graphite composite material is calcined at a high temperature in a nitrogen atmosphere to obtain the Fe-Fe2O3 / nitrogen-doped expandable graphite composite material. The higher the expansion ratio of the nitrogen-doped expanded graphite is, the more the loaded nano-iron is. The high-expansion-ratio expanded graphite has an excellent adsorption characteristic on grease, the Fe-Fe2O3 with large specific surface area has agood adsorption effect on the grease, and the two substances are combined to further enhance the adsorption removal capacity on the grease, so the composite material can be widely applied to grease wastewater treatment.

Description

technical field [0001] The present invention relates to a kind of Fe-Fe 2 o 3 Preparation and application field of nitrogen-doped expanded graphite composite material, especially a kind of Fe-Fe used for oil adsorption 2 o 3 / The preparation method of nitrogen-doped expanded graphite composite material. Background technique [0002] The development of the petrochemical industry has led to more and more frequent oil extraction and transportation. In this process, it is inevitable that oil leakage will occur and cause environmental pollution. Therefore, in order to solve these problems, there is an urgent need to develop excellent oil-absorbing materials to deal with oil leakage. [0003] Expanded graphite has an extremely rich pore structure, soft texture and porous surface, and has many advantages such as thermal stability, self-lubricating, corrosion resistance, high temperature resistance and high thermal conductivity. The porous structure of expanded graphite makes i...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C11B3/10
CPCB01J20/02B01J20/06B01J20/20B01J20/28009B01J20/3078B01J20/3085C11B3/10
Inventor 温华辉
Owner HANGZHOU XINKANG NEW MATERIAL CO LTD
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