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Process for preparing dealdehydizing material

A technology of activated carbon fibers and transition metal salts, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problems of poor adsorption and removal performance, low adsorption capacity, etc. The effect of large capacity

Inactive Publication Date: 2003-11-26
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional activated carbon fiber is a kind of microporous, non-polar carbon adsorbent, but the disadvantage is that activated carbon fiber has poor adsorption and removal performance for formaldehyde and other polar organic compounds, and its adsorption capacity is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The polyacrylonitrile activated carbon fiber was dried at 100°C, and added 0.01mol / l CuCl to 0.01mol / l p-aminobenzenesulfonic acid under normal pressure 2 Immerse in the solution for 24 hours, take it out and extrude, air-dry, and then dry at 100°C in an air atmosphere to obtain a dealdehyde material. Performance test: use 2g of this material to treat aldehyde-containing gas at room temperature, the inlet concentration of formaldehyde is 5ppm, and the inlet concentration of water vapor is 10ppm (nitrogen + air + formaldehyde + water vapor). The flow rate is 10ml / min, and the breakthrough time (the breakthrough time when the outlet concentration is 5% of the inlet concentration) is 12 minutes for water vapor and 6 hours for formaldehyde.

Embodiment 2

[0018] Viscose-based activated carbon fibers are dried at 105°C, and then added to 0.1mol / l p-aminobenzoic acid and 0.1mol / l Fe in a stainless steel pressurizable device at a pressure of 0.2Mpa. 2 (SO4) 3 Immersed in the solution for 20 hours, taken out and extruded, air-dried, and then dried at 105°C in an air atmosphere to obtain a dealdehyde material. Performance test: use 3g of this material to treat aldehyde-containing gas at room temperature, the inlet concentration of formaldehyde is 10ppm, and the inlet concentration of water vapor is 100ppm (nitrogen + air + formaldehyde + water vapor). The flow rate is 12ml / min, and the breakthrough time (the breakthrough time when the outlet concentration is 5% of the inlet concentration) is 18 minutes for water vapor and 12 hours for formaldehyde.

Embodiment 3

[0020] Pitch-based activated carbon fibers were dried at 110°C, and 0.2mol / l p-aminobenzenesulfonic acid was added to 0.5mol / l CoCl under normal pressure. 2 Immerse in the solution for 12 hours, take it out and extrude, air-dry, and then dry at 110° C. in an air atmosphere to obtain a dealdehyde material. Performance test: 5g of this material is used to treat aldehyde-containing gas at room temperature, the inlet concentration of formaldehyde is 15ppm, and the inlet concentration of water vapor is 150ppm (nitrogen + air + formaldehyde + water vapor). The flow rate is 15ml / min, and the breakthrough time (the breakthrough time when the outlet concentration is 5% of the inlet concentration) is 15 minutes for water vapor and 9 hours for formaldehyde.

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Abstract

A material for removing aldehyde odour is prepared from activated carbon fibres through drying at 100-150 deg.C, impregnating in the mixture of hydrophilic organic compound solution containing amino groups and transition metal salt solution under 0.2-10 MPa for 0.5-24 hr, squeezing, drying in air, and drying at 100-150 deg.C. Its advantages are high speed and capacity and no pollution.

Description

Technical field: [0001] The invention belongs to a method for preparing a material for removing volatile organic compounds (VOC), in particular to a method for preparing an activated carbon fiber material for removing aldehyde-containing gas. Background technique: [0002] In recent years, the seriousness of indoor air pollution has aroused people's attention day by day. Formaldehyde and other aldehydes are common indoor air pollutants, and formaldehyde pollution has become an important factor in indoor pollution. Formaldehyde is a kind of primary poison, and formaldehyde in the air can cause obvious irritation to eyes, nose, throat, skin, etc. Formaldehyde is also a volatile organic compound (VOCs-Volatile Organic Compounds). Therefore, the control of formaldehyde pollution has become a major part of the control of indoor VOCs pollution. In order to fundamentally solve the pollution caused by volatile organic compounds such as formaldehyde, the method of adsorption is co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04B01J20/20B01J20/32
Inventor 郑经堂荣海琴刘振宇刘平光曹雅秀
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI