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A kind of method that formaldehyde is converted into methanol rapidly

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, limited material adsorption performance, and non-compliance with the green development trend of carbon sequestration and emission reduction. The effect of simple manufacturing process

Active Publication Date: 2022-06-14
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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  • A kind of method that formaldehyde is converted into methanol rapidly
  • A kind of method that formaldehyde is converted into methanol rapidly
  • A kind of method that formaldehyde is converted into methanol rapidly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Effect of activated carbon powder and tris(3-hydroxypropyl)phosphine solid-liquid ratio on formaldehyde conversion

[0019] The activated carbon was 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, 1.55:1 mg / mL, 1.65:1 mg / mL, 1.75:1 mg / mL, respectively, weighed activated carbon powder and tris(3-hydroxypropyl)phosphine, mixed, aged for 12 hours, and air-dried to obtain nine groups of carbon phosphine catalytic materials . Nine groups of carbon phosphine catalytic materials are used as filling materials to fill between the low temperature plasma processor medium baffle and the low pressure electrode plate, and then argon gas is introduced into the polytetrafluoroethylene reaction tank for 5 minutes, and then formaldehyde gas, hydrogen, Argon mixed gas is irr...

Embodiment 2

[0031] Example 2 Influence of the volume ratio of formaldehyde gas, hydrogen gas and argon gas on the conversion of formaldehyde

[0032]The activated carbon was ground and passed through a 300-mesh sieve to obtain activated carbon powder. Activated carbon powder and tris(3-hydroxypropyl)phosphine were weighed according to the solid-liquid ratio of activated carbon powder and tris(3-hydroxypropyl)phosphine at 1.5:1 mg / mL, mixed, aged for 24 hours, and air-dried to obtain carbon phosphine catalyst. Material. The carbon phosphine catalytic material is used as a filling material to fill between the low temperature plasma processor medium baffle and the low pressure electrode, and then argon gas is first introduced into the PTFE reaction tank for 10 minutes, and then formaldehyde gas, hydrogen gas, and argon gas are introduced. The mixed gas is irradiated with low-temperature plasma at the same time, and the gas of the filled carbon phosphine catalytic material is recovered by co...

Embodiment 3

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

[0038] The activated carbon was ground and passed through a 400-mesh sieve to obtain activated carbon powder. Activated carbon powder and tris(3-hydroxypropyl)phosphine were weighed according to the solid-liquid ratio of activated carbon powder and tris(3-hydroxypropyl)phosphine at 1.5:1 mg / mL, mixed, aged for 36 hours, and air-dried to obtain carbon phosphine catalyst. Material. The carbon phosphine catalytic material is used as a filling material to fill between the low-temperature plasma processor medium baffle and the low-voltage electrode, and then argon gas is first introduced into the polytetrafluoroethylene reaction tank for 15 minutes, followed by formaldehyde gas, hydrogen gas, and argon gas. The mixed gas is irradiated with low-temperature plasma at the same time, and the gas of the filled carbon phosphine catalytic material is recovered by condensation to obta...

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Abstract

The invention discloses a method for rapidly converting formaldehyde into methanol, which comprises the following steps: separately 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; Fill the carbon phosphine catalytic material between the dielectric baffle plate and the low-voltage electrode of the low-temperature plasma processor, first pass argon gas for 5 to 15 minutes, and then pass in the mixed gas of formaldehyde gas, hydrogen gas and argon gas, and perform low-temperature plasma irradiation at the same time. The gas of the filled carbon phosphine catalytic material is recovered through condensation to obtain a methanol solution. The process of the invention is simple, no other chemical reagents need to be added in the formaldehyde reduction process, and the continuous conversion of formaldehyde gas is realized by feeding formaldehyde at the front end and recovering methanol at the back end. The highest conversion rate of formaldehyde is 99.75%, and the highest purity of methanol can reach 98.24% %.

Description

technical field [0001] The invention relates to the field of harmless disposal and resource utilization of dangerous 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 most frequently exposed pollutants. Formaldehyde is a carcinogen and one of the most important causes of human respiratory system diseases. my country's relevant interior decoration standards stipulate that the concentration of formaldehyde gas in indoor air should be lower than 0.08mg / m 3 . If exposed to high concentrations of formaldehyde for a long time, it will not only cause a violent reaction 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 oxidative removal. Physical adsorption techn...

Claims

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Application Information

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Patent Type & Authority Patents(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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