Catalyst for purifying formaldehyde at room temperature and preparation method thereof

A formaldehyde purification and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of less catalyst recycling and regeneration, and achieve high formaldehyde elimination. Efficiency, efficient recovery, low precious metal content

Inactive Publication Date: 2017-03-15
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the currently studied noble metal catalyst systems, little is involved in the recycling and recycling of catalysts.

Method used

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  • Catalyst for purifying formaldehyde at room temperature and preparation method thereof
  • Catalyst for purifying formaldehyde at room temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use a pipette gun to accurately measure 660 μl of chloroplatinic acid aqueous solution with a concentration of 40 mg / ml (concentration based on the mass of platinum element, the same below) and drop it into a round-bottomed flask filled with 10 ml of deionized water, and ultrasonically disperse it for 20 Minutes; Add 2.57 g of ferrous chloride, and mix evenly under mechanical stirring. Heat the water bath to 90 ºC, add 100 ml of 6.4 mol / L sodium hydroxide aqueous solution, and react for 12 h. The precipitate was magnetically separated, washed several times with deionized water, and dried in a vacuum oven at 90 ºC for 10 h. After being ground in an agate mortar, it becomes a supported catalyst. The loading amount of platinum element in the prepared catalyst was 1% by mass.

[0021] The catalyst prepared in this example was characterized and detected. figure 1 For the TEM image of the supported catalyst prepared in this example, it can be seen that the platinum nanopar...

Embodiment 2

[0024] Use a pipette gun to accurately measure 330 μl of chloroplatinic acid aqueous solution with a concentration of 40 mg / ml (concentration based on the mass of platinum element, the same below) and drop it into a round-bottomed flask filled with 10 ml of deionized water, and ultrasonically disperse it for 20 Minutes; Add 2.57 g of ferrous chloride, and mix evenly under mechanical stirring. Heat the water bath to 90 ºC, add 100 ml of 6.4 mol / L sodium hydroxide aqueous solution, and react for 12 h. The precipitate was magnetically separated, washed several times with deionized water, and dried in a vacuum oven at 90 ºC for 10 h. After being ground in an agate mortar, it becomes a supported catalyst. The loading amount of platinum element in the prepared catalyst was 0.5% by mass. Using the same method as in Example 1, the characterization test and performance evaluation of the supported catalyst prepared in this example were carried out. The prepared supported catalyst can ...

Embodiment 3

[0026] Use a pipette gun to accurately measure 1000 μl of chloroplatinic acid aqueous solution with a concentration of 40 mg / ml (concentration based on the mass of platinum element, the same below) into a round-bottomed flask filled with 10 ml of deionized water, and ultrasonically disperse for 20 Minutes; Add 2.57 g of ferrous chloride, and mix evenly under mechanical stirring. Heat the water bath to 90 ºC, add 100 ml of 6.4 mol / L sodium hydroxide aqueous solution, and react for 12 h. The precipitate was magnetically separated, washed several times with deionized water, and dried in a vacuum oven at 90 ºC for 10 h. After being ground in an agate mortar, it becomes a supported catalyst. The loading amount of platinum element in the prepared catalyst was 1.5% by mass. Using the same method as in Example 1, the characterization test and performance evaluation of the supported catalyst prepared in this example were carried out. The prepared supported catalyst has excellent cata...

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Abstract

The invention discloses a catalyst for purifying formaldehyde at room temperature and a preparation method thereof. Chloroplatinic acid aqueous solution and ferrite aqueous solution are mixed first by means of in-situ precipitation reduction, after heating an alkali liquid is added, is stirred and mixed well and is reacted to produce precipitate, and the catalyst is prepared by separation and drying. The catalyst prepared herein has good low-temperature activity and removal efficiency under room temperature and ambient humidity, and is capable of converting formaldehyde completely into carbon dioxide and water. The preparation process is simple and easy to perform, the catalyst has low content of noble metals, auxiliary energy devices such as wind, light, thermal, electric energy devices are not req7ired, and the catalyst is suitable for purifying the harmful gas formaldehyde in indoor air. In addition, the catalyst has high superparamagnetism, can be efficiently recycled through an additional magnetic field.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst preparation method for formaldehyde purification at room temperature. Background technique [0002] Formaldehyde is an important chemical in the global economy and is widely used in chemical industries such as construction, wood processing, textiles, furniture, and carpets. With the development of the economy, people's requirements for office and living conditions are increasing, and formaldehyde inevitably enters the environment where people live along with various decorative materials: wood, adhesives, interior wall coatings, wooden furniture, wallpaper and carpets. Among them, because its high-dose exposure can cause acute poisoning, long-term exposure can cause chronic poisoning, cause nasopharyngeal cancer and even leukemia, it is listed as a carcinogen. Formaldehyde has become one of the most harmful pollutants in indoor air to people. It has cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01D53/86B01D53/72
CPCB01D53/8668B01D2258/06B01J23/8906
Inventor 崔维怡薛丹惠继星
Owner JILIN INST OF CHEM TECH
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