Modified activated carbon for purifying VOCs and preparation method of modified activated carbon

A technology of activated carbon and modification, which is applied in the direction of chemical instruments and methods, separation methods, and other chemical processes. It can solve the problems of unsatisfactory response requirements and low adsorption efficiency, and achieve fast adsorption speed, satisfactory purification, and good adsorption effect. Effect

Pending Publication Date: 2021-08-13
广东韩研活性炭科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing technical activated carbon adsorption means have low adsorption efficiency and cannot meet the response requirements

Method used

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  • Modified activated carbon for purifying VOCs and preparation method of modified activated carbon

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Active carbon is prepared according to the following steps.

[0020] 1 kg of activated carbon and 1 kg of potassium hydroxide was mixed, under an inert gas protection, at 1000 ° C, high temperature reaction 2H;

[0021] The mixture of the previous step was cleaned with pure water, washed, washed to the pH of water after washing, did not change.

[0022] After drying the product after the previous step was dried, the hydrogen peroxide was added, under 80 ° C, thoroughly mixed, after 18 h, dried;

[0023] The active carbon after treatment was added to toluene, stirred for 6 h;

[0024] After filtration, then submerged for 6 h with a 75% methanol solution, dried, washed with water, drying the pretextile.

Embodiment 2

[0026] Active carbon is prepared according to the following steps.

[0027] 1 kg of activated carbon and 3 kg of potassium hydroxide is mixed, under an inert gas protection, 1200 ° C under conditions, high temperature reaction 1 h;

[0028] The mixture of the previous step was cleaned with pure water, washed, washed to the pH of water after washing, did not change.

[0029] After drying the product after the previously washed, the hydrogen peroxide, sodium hydroxide, and phosphate composition is added, wherein calculating the hydrogen peroxide in accordance with mass ratio: sodium hydroxide: phosphoric acid = 3: 1: 4, under 60 ° C, thoroughly mixing, After 24 h, drying;

[0030] The active carbon after the previous step was given in chloroform, stirring, stirring for 3 h;

[0031] After filtration, then submerged for 2 h with 50% methanol solution, dried, after washing with water, drying the pretextile.

Embodiment 3

[0033] Active carbon is prepared according to the following steps.

[0034] 1 kg of activated carbon and 2 kg of potassium hydroxide is mixed, under an inert gas protection, under 1200 ° C, high temperature reaction 1H;

[0035] The mixture of the previous step was cleaned with pure water, washed, washed to the pH of water after washing, did not change.

[0036] After drying the product after washing the previous step, the hydrogen peroxide, sodium hydroxide, and phosphate composition were added, and the hydrogen peroxide was calculated according to the mass ratio: sodium hydroxide: phosphoric acid = 5: 1: 7, under 80 ° C, thoroughly mixed, After 24 h, drying;

[0037] The active carbon after the previous step was added to an organic solution, wherein the organic solution consisted of chloroform, toluene, tetrahydrofuran, chlorofura according to mass ratio: toluene: tetrahydrofuran = 10: 3: 3, thoroughly mixed, stirred for 3 h;

[0038] After filtration, then submerged for 2 h wit...

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PUM

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Abstract

The invention discloses a preparation method of modified activated carbon. The preparation method comprises the following steps: (1) mixing activated carbon and an activating agent, and conducting reacting at 1000-1200 DEG C for 1-2 hours under the protection of inert gas; (2) after the above reaction, conducting full washing with clear water; (3) mixing a modifier 1 with the washed activated carbon, conducting full mixing at 60-80 DEG C, performing reacting for 18-24 hours, and conducting full washing with clear water; (4) subjecting a modifier 2 to reacting with the activated carbon treated in the step (3) for 3-6 hours, and performing full washing with clear water; and (5) conducting drying, performing soaking with an alcoholic solution for 2-6 hours, and carrying out drying. The activating agent is alkali, the modifier 1 is at least one selected from the group consisting of phosphoric acid, peroxide and persulfate, and the modifier 2 is an organic solution. According to the preparation method, the adsorption effect of the activated carbon on the VOCs can be remarkably improved.

Description

Technical field [0001] The present invention relates to an organic modified activated carbon material and a preparation method thereof and an application thereof, belonging to the technical field of material preparation. . Background technique [0002] VOCS (VOLATILE Organic Compounds) is a variety of organic compounds at room temperature, boiling point of 50 ° C to 260 ° C. In my country, VOCs refers to an organic compound having a saturated vapor pressure of at normal temperature, a boiling point of 260 ° C or less, or at 20 ° C, a vapor pressure is greater than or equal to 10 Pa and has a full organic compound having a volatility. [0003] It is usually divided into a variety of categories of non-methane hydrocarbon (referred to as NMHCs), oxygen-containing organic compound, halogenated hydrocarbon, nitrogen-containing organic compound, sulfur organic compound. VOCs are involved in the formation of ozone and secondary aerosols in the atmosphere environment, which has an import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01J20/20B01D53/02B01J2220/4806B01J2220/4812B01D2253/102B01D2257/708
Inventor 韩初榆韩琍君崔国强徐海健张婉芳
Owner 广东韩研活性炭科技股份有限公司
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