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Preparation method of niobium-modified active aluminum oxide for formaldehyde purifying as well as product and application

A technology for purification of activated alumina and formaldehyde, applied in the field of air purification, to achieve the effects of improving performance, avoiding secondary pollution, and novel preparation methods

Active Publication Date: 2017-12-08
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the use of niobium-modified activated alumina or molecular sieves

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for preparing niobium-modified activated alumina used for formaldehyde purification, using activated alumina as raw material, comprising the following steps:

[0025] (1) Put 5 g of activated alumina in the niobium salt solution, which is prepared by dissolving 0.20 g of niobium oxalate in 100 mL of water, add 0.08 mL of hydrochloric acid with a concentration of 0.5 mol / L, and stir to dissolve;

[0026] (2) Suction filtration after ultrasonication for 8 hours to obtain activated alumina samples treated with niobium salts;

[0027] (3) Niobium-modified activated alumina that can be used for formaldehyde purification is obtained after temperature treatment, wherein the temperature treatment is:

[0028] When the niobium concentration is 0o The catalyst product was dried in C oven for 12 h to obtain niobium-modified activated alumina for formaldehyde purification.

[0029] Investigate its purification performance of formaldehyde at room temperature. A mixture of...

Embodiment 2

[0031] A method for preparing niobium-modified activated alumina used for formaldehyde purification, using activated alumina as raw material, comprising the following steps:

[0032] (1) Put 5 g of activated alumina in a niobium salt solution, which is prepared by dissolving 0.40 g of niobium oxalate in 100 mL of water, add 0.16 mL of 0.5 mol / L hydrochloric acid and stir to dissolve, the concentration of hydrochloric acid 0.1~0.2 times the concentration of niobium salt;

[0033] (2) Suction filtration after ultrasonication for 8 h to obtain activated alumina samples treated with niobium salts;

[0034] (3) Niobium-modified activated alumina that can be used for formaldehyde purification is obtained after temperature treatment, wherein the temperature treatment is:

[0035] When the niobium concentration is 0o C oven dried for 12 h. spare.

[0036] The purification performance of formaldehyde at room temperature was investigated. A mixture of formaldehyde and air was introd...

Embodiment 3

[0038] A method for preparing niobium-modified activated alumina used for formaldehyde purification, using activated alumina as raw material, comprising the following steps:

[0039] (1) Put 5g of activated alumina in the niobium salt solution, which is prepared by dissolving 0.60 g of niobium oxalate in 100 mL of water, add 0.25 mL of 0.5 mol / L hydrochloric acid, and stir to dissolve;

[0040] (2) Suction filtration after ultrasonication for 8 hours to obtain activated alumina samples treated with niobium salts;

[0041] (3) Niobium-modified activated alumina that can be used for formaldehyde purification is obtained after temperature treatment, wherein the temperature treatment is:

[0042] When the niobium concentration is 0o After drying in an oven at C for 12 h, set aside.

[0043] The purification performance of formaldehyde at room temperature was investigated. A mixture of formaldehyde and air was introduced into the continuous flow fixed bed device, the reaction pre...

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PUM

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Abstract

The invention discloses niobium-modified active aluminum oxide for formaldehyde purifying as well as a preparation method and application thereof. Active aluminum oxide is put into a niobium salt solution with certain concentration, a proper amount of hydrochloric acid is added, and suction filtration is performed after ultrasonic processing is performed for 5-12 hours; and an obtained sample is used after being separately treated by two temperatures. The active aluminum oxide treated by low-concentration niobium salt with niobium concentration being greater than 0 and smaller than or equal to 0.012 mol / L is put into a drying oven of 50 DEG C to be dried for 12 hours, and then is applied to formaldehyde purifying; and the active aluminum oxide treated by high-concentration niobium salt with niobium concentration being greater than 0.012 mol / L and smaller than or equal to 0.020 mol / L is put into into the drying oven of 50 DEG C to be dried for 12 hours, and is roasted under air atmosphere for 4-5 hours at a roasting temperature of 400-500 DEG C. The preparation method disclosed by the invention can be suitable for modifying of the active aluminum oxide and molecular sieve, can improve performance to be 2-5 times of those of an unprocessed sample; and the niobium-modified active aluminum oxide is not liable to desorption when environmental condition changes, so that secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the field of air purification, and in particular relates to a preparation method, product and application of niobium-modified activated alumina for formaldehyde purification. Background technique [0002] Formaldehyde has a certain toxic effect on the human nervous system, liver, skin, and immune system, and is easy to produce poison. With people's high pursuit of quality of life, formaldehyde purification has become a hot issue in the environmental field. Because indoor formaldehyde is dispersed, the treatment capacity is small, and the concentration is low, so the adsorption method is more suitable for indoor formaldehyde removal. Some air purifiers and filters are designed using the principle of adsorption. [0003] The adsorption method has the advantages of high removal efficiency, strong enrichment function, low energy consumption, mature process, easy promotion and good environmental benefits. It is suitable for advanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30B01D53/02
CPCB01D53/02B01D2257/70B01D2258/06B01J20/0214B01J20/08
Inventor 何丹农袁静高振源蔡婷赵昆峰杨玲张涛金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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