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Environment-friendly formaldehyde-removing activated carbon and preparation method thereof

A technology for activated carbon and formaldehyde removal, which is applied in separation methods, chemical instruments and methods, and other chemical processes. It can solve problems such as high cost, non-long-term removal of formaldehyde, and insufficient effective exposed area, and achieve long-term removal and adsorption performance. Good, good formaldehyde adsorption removal effect

Active Publication Date: 2020-12-25
品顾科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the materials used to remove formaldehyde by adsorption are mostly activated carbon, but the effective exposed area is not enough and the cost is high
[0006] Chinese invention patent ZL2017112704875 uses silver loading to modify and activate activated carbon. The raw material contains anions, and the cost of raw materials is relatively high. In addition, there is a shortcoming that the removal of formaldehyde is not long-lasting.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A preparation method of environmentally friendly formaldehyde-removing activated carbon, comprising the following steps:

[0047] (1) Acidification: coal-based activated carbon is mixed with citric acid, the mass ratio of the activated carbon to citric acid is 75:1, and dried at a temperature of 120° C. for 6 hours to obtain acidified activated carbon;

[0048] (2) Attached graphene: Stir and mix the above-mentioned acidified activated carbon with graphene oxide, titanium dioxide, and ethanol, and then dry at 80° C. for 30 hours to obtain graphene-modified activated carbon;

[0049] The mass ratio of the acidified activated carbon, graphene oxide, titanium dioxide, and ethanol is 2000:2:4:200;

[0050] (3) carbonization: the graphene modified activated carbon is subjected to carbonization treatment to obtain carbonized activated carbon;

[0051] In the carbonization step, control the negative pressure at 70Pa, and carbonize at a temperature of 500°C for 2 hours;

[00...

Embodiment 2

[0081] A preparation method of environmentally friendly formaldehyde-removing activated carbon, comprising the following steps:

[0082] (1) Acidification: coal-based activated carbon is mixed with citric acid, the mass ratio of the activated carbon to citric acid is 75:1, and dried at a temperature of 120° C. for 6 hours to obtain acidified activated carbon;

[0083] (2) Attached graphene: Stir and mix the above-mentioned acidified activated carbon with graphene oxide, manganese dioxide, and ethanol, and then dry at 80° C. for 30 hours to obtain graphene-modified activated carbon;

[0084] The mass ratio of the acidified activated carbon, graphene oxide, manganese dioxide, and ethanol is 2000:2:4:200;

[0085] (3) carbonization: the graphene modified activated carbon is subjected to carbonization treatment to obtain carbonized activated carbon;

[0086] In the carbonization step, control the negative pressure at 70Pa, and carbonize at a temperature of 500°C for 2 hours;

[...

Embodiment 3

[0089] A preparation method of environmentally friendly formaldehyde-removing activated carbon, comprising the following steps:

[0090] (1) Acidification: coal-based activated carbon is mixed with citric acid, the mass ratio of the activated carbon to citric acid is 75:1, and dried at a temperature of 120° C. for 6 hours to obtain acidified activated carbon;

[0091] (2) Attached graphene: Stir and mix the above-mentioned acidified activated carbon with graphene oxide, titanium dioxide, manganese dioxide, and ethanol, and then dry at 80° C. for 30 hours to obtain graphene-modified activated carbon;

[0092] The mass ratio of acidified activated carbon, graphene oxide, titanium dioxide, manganese dioxide and ethanol is 2000:2:3:1:200;

[0093] (3) carbonization: the graphene modified activated carbon is subjected to carbonization treatment to obtain carbonized activated carbon;

[0094] In the carbonization step, control the negative pressure at 70Pa, and carbonize at a tempe...

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Abstract

The invention discloses an environment-friendly formaldehyde-removing activated carbon and a preparation method thereof. The method comprises the following steps: (1) mixing activated carbon and solidweak acid, and drying to obtain acidified activated carbon; (2) mixing the acidified activated carbon with graphene oxide, metal oxide and ethanol, and drying at 70-90 DEG C for 20-40 hours to obtaingraphene modified activated carbon; (3) carbonizing the graphene modified activated carbon to obtain carbonized activated carbon; and (4) activating the carbonized activated carbon by using water vapor. The environment-friendly formaldehyde-removing activated carbon is good in adsorption performance, has a good antibacterial effect and a good formaldehyde adsorption removal effect, and particularly can remove formaldehyde for a long time.

Description

technical field [0001] The invention relates to an environment-friendly formaldehyde-removing activated carbon and a preparation method thereof. Background technique [0002] The main hazard of formaldehyde is the irritation to the skin and mucous membranes. When formaldehyde reaches a certain concentration indoors, people will feel uncomfortable. Greater than 0.08m 3 High formaldehyde concentrations can cause red eyes, itchy eyes, throat discomfort or pain, hoarseness, sneezing, chest tightness, wheezing, dermatitis, etc. Newly decorated rooms have higher levels of formaldehyde, which is the main cause of many diseases. [0003] Formaldehyde mainly comes from wood-based panels for indoor furniture, adhesives with formaldehyde as the main raw material, and other decorative materials that contain formaldehyde and emit to the outside world. Formaldehyde is a highly toxic substance and ranks second on the list of priority control of toxic chemicals in my country. [0004] I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J23/34B01J20/30B01D53/86B01D53/81B01D53/72
CPCB01J20/20B01J20/06B01J23/34B01D53/8671B01D53/81B01D53/72B01J2220/4806B01J2220/4812B01D2253/102B01D2255/2073B01D2255/20707Y02A50/20
Inventor 张艺峰
Owner 品顾科技(苏州)有限公司
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