Nitric acid modified porous carbon and applications thereof

A porous carbon and modification technology, applied in other chemical processes, petroleum wax refining, chemical instruments and methods, etc., can solve the problems of patents and literatures that have not been reported, and achieve the effect of low price, high adsorption capacity and convenient operation

Inactive Publication Date: 2018-02-16
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This application uses a one-step hydrothermal synthesis method to synthesize nitrogen-doped porous carbon precursor

Method used

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  • Nitric acid modified porous carbon and applications thereof
  • Nitric acid modified porous carbon and applications thereof
  • Nitric acid modified porous carbon and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of porous carbon modified by nitric acid, the steps of its preparation method are:

[0039] 1. Synthesis of N-doped porous carbon:

[0040] 1.1. Add 0.03mol of melamine and 0.01mol of calcium citrate into 15mL of water, stir and mix well to obtain a liquid mixture, transfer the liquid mixture to a polytetrafluoroethylene hydrothermal kettle for hydrothermal reaction, and the reaction temperature is 150°C. The reaction time is 48 hours. After the reaction is completed, the precursor is obtained and dried;

[0041] 1.2. Put the dried precursor in the N 2 In the tube furnace, ensure that the tube furnace has good airtightness. At the same time, the temperature is raised to 850°C, the heating rate is 2°C / min, and the heat preservation is roasted for 2 hours. After the roasting is completed, the black powder obtained by roasting is etched with 10wt% hydrochloric acid. Treat (soak) for 12 hours, and wash with deionized water until the pH of the obtained filtrate is 7...

Embodiment 2

[0059] A kind of porous carbon modified by nitric acid, the steps of its preparation method are:

[0060] 1. Synthesis of N-doped porous carbon:

[0061] 1.1. Add 0.03mol of melamine and 0.01mol of calcium citrate into 15mL of water, stir and mix well to obtain a liquid mixture, transfer the liquid mixture to a polytetrafluoroethylene hydrothermal kettle for hydrothermal reaction, and the reaction temperature is 150°C. The reaction time is 48 hours. After the reaction is completed, the precursor is obtained and dried;

[0062] 1.2. Put the dried precursor in the N 2 In the tube furnace, ensure that the tube furnace has good airtightness. At the same time, the temperature is raised to 850 °C, the heating rate is 2 °C / min, and the heat preservation is roasted for 2 hours. The black powder obtained by roasting is etched by hydrochloric acid with a mass fraction of 10 wt%. Treat (soak) for 12 hours, and wash with deionized water until the pH of the obtained filtrate is 7, and dr...

Embodiment 3

[0066] A kind of porous carbon modified by nitric acid, the steps of its preparation method are: 1, the synthesis of N-doped porous carbon:

[0067] 1.1. Add 0.03mol of melamine and 0.01mol of calcium citrate into 15mL of water, stir and mix well to obtain a liquid mixture, transfer the liquid mixture to a polytetrafluoroethylene hydrothermal kettle for hydrothermal reaction, and the reaction temperature is 150°C. The reaction time is 24 hours. After the reaction is completed, the precursor is obtained and dried;

[0068] 1.2. Put the dried precursor in the N 2 In the tube furnace, ensure that the tube furnace has good airtightness. At the same time, the temperature is raised to 850 °C, the heating rate is 2 °C / min, and the heat preservation is roasted for 2 hours. The black powder obtained by roasting is etched by hydrochloric acid with a mass fraction of 10 wt%. (soaking) for 12 hours, and washing with deionized water until the pH of the obtained filtrate is 7, and drying t...

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Abstract

The invention discloses a nitric acid modified porous carbon and applications thereof. The nitric acid modified porous carbon is prepared by the following steps: taking melamine as the nitrogen sourceand calcium citrate as the carbon source; carrying out one-step hydrothermal synthesis to obtain a precursor; sintering the precursor at a high temperature to obtain N doped porous carbon; and finally subjecting N doped porous carbon to a nitration modification treatment to obtain the nitric acid modified porous carbon, which has the advantages of large specific surface area and abundant porous structure. The porous carbon can be used to adsorb aromatic hydrocarbons in liquid wax oil and the effect is good.

Description

technical field [0001] The invention relates to the technical field of adsorption and separation, in particular to a nitric acid modified porous carbon and its application. Background technique [0002] Liquid paraffin oil refers to the kerosene or diesel fraction in the second processed light oil of petroleum crude oil as raw material, which can be dewaxed by molecular sieve adsorption separation process or dewaxed by isopropanol-urea to obtain paraffin containing n-alkanes. Or liquid paraffins synthesized during coal / natural gas liquefaction. It is an important chemical basic raw material, its main component is n-undecane to n-hexadecane n-paraffin, it can prepare a series of chemical products, such as chlorinated paraffin, pesticide emulsifier, leather, Plastic plasticizers, fertilizer additives and cosmetics, etc. Since liquid paraffin oil is an intermediate of fine chemical raw materials refined from petroleum, and the high content of aromatic hydrocarbons (mainly alk...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C10G73/42
CPCB01J20/20C10G73/42
Inventor 肖杨毛佳宇金士威洪景萍
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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