Preparation method of phenolic aldehyde-based activated carbon fiber felt

A technology based on activated carbon and fiber felt, applied in the direction of fiber chemical characteristics, heating/cooling fabrics, non-woven fabrics, etc., can solve the problems of high process parameter control, high manufacturing cost, and complexity, and achieve simple process and equipment, The effect of wide source of raw materials and low price

Inactive Publication Date: 2022-03-18
QINGDAO HSJ ENVIRONMENTAL PROTECTION TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the monomer composition of the phenolic resin used in the process of preparing thermosetting phenolic fiber by wet spinning is special and complicated, and generally needs to be synthesized separately, and the control of various process parameters in the production process requires high requirements
Therefore, it is difficult to manufacture thermosetting phenolic fiber, and the manufacturing cost is relatively high. Although it has a high cost-effective advantage in the field of flame-retardant and heat-resistant fibers, as a raw material for the preparation of activated carbon fibers, its high cost will limit its industrial application.

Method used

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  • Preparation method of phenolic aldehyde-based activated carbon fiber felt

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Comparison scheme
Effect test

Embodiment 1

[0032] A kind of preparation method of phenolic-based activated carbon fiber felt, such as figure 1 In the process flow shown, thermoplastic phenolic resin with a softening point of 85°C and a free phenol content of 1.0% is melted under a nitrogen atmosphere at 130°C, and short fibers of 6.4dtex and 64mm are prepared by melt spinning. The staple fiber is processed by acupuncture and non-woven, and the weight is 470g / m 2 , Thickness 4.3mm needle felt. The needle felt was oxidized at 75°C for 24 hours in an air atmosphere to complete the pre-oxidation treatment. Under the condition of an atmosphere with an oxygen content of 4%, the carbonization furnace was used to slowly raise the temperature from 140°C to 400°C, and the heating process lasted for 30 minutes to complete the low-temperature carbonization. Under a nitrogen atmosphere, the carbonization furnace was used to slowly increase the temperature from 400°C to 900°C, and the heating process lasted for 40 minutes to compl...

Embodiment 2

[0034] A method for preparing phenolic-based activated carbon fiber felt, using thermoplastic phenolic resin with a softening point of 100°C and a free phenol content of 1.4%, melting it under a nitrogen atmosphere at 150°C, and preparing short fibers of 4.2dtex and 55mm through melt spinning. The staple fiber is prepared by needle-punched non-woven processing with a grammage of 590g / m 2 , Thickness 6.2mm needle felt. Oxidize the needle felt at 78°C for 20 hours in an air atmosphere to complete the pre-oxidation treatment. Under the condition of an atmosphere with an oxygen content of 6%, the carbonization furnace was used to slowly raise the temperature from 140°C to 350°C, and the heating process lasted for 30 minutes to complete the low-temperature carbonization. Under a nitrogen atmosphere, the carbonization furnace was used to slowly increase the temperature from 400 °C to 1000 °C, and the heating process lasted for 45 minutes to complete the high-temperature carbonizati...

Embodiment 3

[0036] A method for preparing phenolic-based activated carbon fiber felt, using a thermoplastic phenolic resin with a softening point of 93°C and a free phenol content of 1.3%, melting it under a nitrogen atmosphere at 120°C, and preparing short fibers of 5.6dtex and 76mm through melt spinning. The staple fiber is processed by needle-punched non-woven fabric with a weight of 690g / m 2 , Thickness 5.7mm needle felt. The needle felt was oxidized at 60°C for 24 hours in an air atmosphere to complete the pre-oxidation treatment. Under the condition of an atmosphere with an oxygen content of 10%, the carbonization furnace was used to slowly raise the temperature from 140°C to 400°C, and the heating process lasted for 30 minutes to complete the low-temperature carbonization. Under the condition of an atmosphere with an oxygen content of 1%, the carbonization furnace was used to slowly increase the temperature from 400°C to 1000°C, and the heating process lasted for 50 minutes to com...

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Abstract

The invention provides a preparation method of an activated carbon fiber felt, and particularly relates to a preparation method of a phenolic aldehyde-based activated carbon fiber felt. The preparation method comprises the following steps: carrying out melt spinning on thermoplastic phenolic resin to prepare thermoplastic phenolic fibers, further preparing a thermoplastic phenolic fiber felt, then carrying out pre-oxidation, carrying out low-temperature carbonization and high-temperature carbonization, and finally, carrying out activation. The phenolic aldehyde-based activated carbon fiber felt adopts thermoplastic phenolic resin as a raw material, is wide in source and low in price, and the manufacturing cost increase caused by the two-step carbonization process is far lower than that of a thermosetting phenolic fiber manufacturing scheme, so that the phenolic aldehyde-based activated carbon fiber felt has more industrialization advantages.

Description

technical field [0001] The invention relates to a preparation method of an activated carbon fiber felt, in particular to a preparation method of a phenolic-based activated carbon fiber felt. Background technique [0002] Phenolic-based activated carbon fibers, that is, activated carbon fibers prepared from phenolic fibers, have the advantages of high yield, developed pore size, high strength, and low ash content. The usual preparation scheme of the phenolic fiber as its raw material is to prepare the thermosetting phenolic fiber by heating and curing the thermosetting phenolic fiber after wet spinning. [0003] At present, the basic process of preparing phenolic-based activated carbon fibers is to first prepare thermosetting phenolic fibers, then perform needle-punched felting on the thermosetting phenolic fibers, and perform carbonization and activation treatments, and finally complete the preparation. Thermosetting phenolic fibers are generally prepared by wet spinning of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4326D04H1/46D06C7/04D01F9/24
CPCD04H1/4326D04H1/46D06C7/04D01F9/24
Inventor 陈保磊赵永谦陈阳万月亮
Owner QINGDAO HSJ ENVIRONMENTAL PROTECTION TECH CO LTD
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