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Method for rapidly converting formaldehyde into methanol

A fast, methanol-based technology, applied in chemical instruments and methods, separation methods, preparation of organic compounds, etc., can solve problems such as secondary pollution, non-compliance with the green development trend of carbon sequestration and emission reduction, and adsorption performance of limited materials, etc., to achieve The effect of simple manufacturing process

Active Publication Date: 2020-09-29
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that this technology not only has the risk of secondary pollution, but is also limited by the adsorption performance of the material itself and the post-processing capacity of the material
Oxidation technology can completely oxidize formaldehyde into carbon dioxide and water, but oxidation technology itself is a technology for releasing carbon dioxide, which does not conform to the current green development trend of carbon sequestration and emission reduction

Method used

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  • Method for rapidly converting formaldehyde into methanol
  • Method for rapidly converting formaldehyde into methanol
  • Method for rapidly converting formaldehyde into methanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 The Effect of Activated Carbon Powder and Tris(3-Hydroxypropyl)phosphine Solid-to-Liquid Ratio on Formaldehyde Conversion

[0019] The activated carbon is ground and passed through a 200-mesh sieve to obtain activated carbon powder. According to the solid-liquid ratio of activated carbon powder and tris(3-hydroxypropyl)phosphine 0.25:1mg / mL, 0.35:1mg / mL, 0.45:1mg / mL, 0.5:1mg / mL, 1.0:1mg / mL, 1.5:1mg / mL mL, 1.55:1mg / mL, 1.65:1mg / mL, 1.75:1mg / mL respectively weigh activated carbon powder and tris(3-hydroxypropyl)phosphine, mix, age for 12 hours, and air-dry to obtain nine groups of carbon phosphine catalytic materials . Nine groups of carbon phosphine catalytic materials are filled between the dielectric baffle plate and the low-voltage electrode plate of the low-temperature plasma processor as filling materials, and then argon gas is passed into the polytetrafluoroethylene reaction tank for 5 minutes, and then formaldehyde gas, hydrogen gas, Argon mixed gas is...

Embodiment 2

[0031] Embodiment 2 The influence of formaldehyde gas, hydrogen, argon volume ratio on formaldehyde conversion

[0032]The activated carbon is ground and passed through a 300-mesh sieve to obtain activated carbon powder. According to the solid-to-liquid ratio of activated carbon powder and tris(3-hydroxypropyl)phosphine 1.5:1 mg / mL, respectively weigh activated carbon powder and tris(3-hydroxypropyl)phosphine, mix, age for 24 hours, and air-dry to obtain carbon phosphine catalyst Material. The carbon phosphine catalytic material is filled between the dielectric baffle plate and the low-voltage electrode of the low-temperature plasma processor as a filling material, and then argon gas is passed into the polytetrafluoroethylene reaction tank for 10 minutes, and then formaldehyde gas, hydrogen gas, and argon gas are passed through The mixed gas is irradiated with low-temperature plasma at the same time, and the gas filled with the carbon phosphine catalytic material is recovered...

Embodiment 3

[0037] Example 3 Effect of low-temperature plasma irradiation voltage on formaldehyde conversion

[0038] The activated carbon is ground and passed through a 400-mesh sieve to obtain activated carbon powder. According to the solid-to-liquid ratio of activated carbon powder and tris(3-hydroxypropyl)phosphine 1.5:1mg / mL, respectively weigh activated carbon powder and tris(3-hydroxypropyl)phosphine, mix, age for 36 hours, and air-dry to obtain carbon phosphine catalyst Material. The carbon phosphine catalytic material is filled between the dielectric baffle plate and the low-voltage electrode of the low-temperature plasma processor as a filling material, and then argon gas is passed into the polytetrafluoroethylene reaction tank for 15 minutes, and then formaldehyde gas, hydrogen gas, and argon gas are passed into The mixed gas is irradiated with low-temperature plasma at the same time, and the gas filled with carbon-phosphine catalytic materials is recovered by condensation to ...

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Abstract

The invention discloses a method for rapidly converting formaldehyde into methanol. The method comprises the following steps: respectively weighing activated carbon powder and tris(3-hydroxypropyl)phosphine, mixing and aging for 12-36 hours, and air-drying to obtain a carbon phosphine catalytic material; filling the carbon phosphine catalytic material between a medium baffle and a low-voltage electrode of a low-temperature plasma processor, introducing argon for 5-15 minutes, introducing a mixed gas of formaldehyde gas, hydrogen and argon, carrying out low-temperature plasma irradiation at thesame time, and condensing and recovering the filled gas of the carbon phosphine catalytic material to obtain a methanol solution. The method is simple, other chemical reagents do not need to be addedin the formaldehyde reduction process, continuous conversion of formaldehyde gas is achieved in the mode that formaldehyde is introduced from the front end and methyl alcohol is recycled from the rear end, the maximum conversion rate of formaldehyde is 99.75%, and the maximum purity of methyl alcohol can reach 98.24%.

Description

technical field [0001] The invention relates to the field of harmless disposal and resource utilization of hazardous pollutants, in particular to a method for rapidly converting formaldehyde into methanol. Background technique [0002] Formaldehyde released from various interior decoration materials is one of the pollutants that people are most frequently exposed to. Formaldehyde is a carcinogen and one of the most important causes of human respiratory system lesions. my country's relevant indoor decoration standards stipulate that the concentration of formaldehyde gas in indoor air should be lower than 0.08mg / m 3 . Long-term exposure to high-concentration formaldehyde will not only cause severe reactions in the human mucosal system, but also cause significant mutations in human cells. Formaldehyde has strong reducibility and good water solubility, so the current disposal of formaldehyde gas is mainly physical adsorption and oxidation removal. Physical adsorption technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/04C07C29/141B01J31/02B01D53/86B01D53/72B01D53/32
CPCC07C29/141B01J31/0267B01D53/8668B01D53/32B01J2231/643C07C2531/02B01D2257/70B01D2259/818B01D2258/06C07C31/04Y02P20/52
Inventor 黄涛宋东平藏颖邓锦涛苏治宇张克
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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