Preparation method of varicosity polytetrafluoroethylene fibre having function for catalytic decomposition of dioxins

A polytetrafluoroethylene, catalytic decomposition technology, used in separation methods, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc. The effect of avoiding pollution, shortening the process flow, and improving the decomposition efficiency

Inactive Publication Date: 2008-09-03
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the weight percentage of polytetrafluoroethylene resin powder and catalyst powder is 1:0.01-0.06, and if more catalyst powder needs to be added, it is very difficult to process the film. The film is prone to voids or even cracks during the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Mixing: Mix expanded polytetrafluoroethylene resin powder (F106 from Daikin Corporation of Japan) and catalyst powder with dioxin-decomposing function (5 micron diameter, provided by Northwest Research Institute of Chemical Industry) in a weight percentage of 1:0.3. , then add liquid paraffin, the weight ratio of expanded polytetrafluoroethylene resin powder to liquid paraffin is 1:0.2, mix well, stand at a temperature of 20°C for 144 hours, then stand at a temperature of 40°C for 10 hours , fully mix polytetrafluoroethylene resin powder, catalyst powder with dioxin-decomposing function, and liquid paraffin to form expanded polytetrafluoroethylene material;

[0026] 2. Compaction and calendering: The expanded polytetrafluoroethylene material is pressed into a cylindrical blank on a compactor at 20°C, and the blank is extruded into a rod at a temperature of 40°C through a plunger extruder, and then passed through The calender is calendered at 40°C to form an expanded ...

Embodiment 2

[0032] 1. Mixing: Mix expanded polytetrafluoroethylene resin powder (Dakin F106, Japan) and dioxin-decomposing catalyst powder (1 micron diameter, provided by Northwest Research Institute of Chemical Industry) by weight percentage 1:0.6. , then add petroleum ether, the weight ratio of expanded polytetrafluoroethylene resin powder to petroleum ether is 1:0.25, mix well, stand at a temperature of 30°C for 121 hours, and then stand at a temperature of 60°C for 12 hours , fully mix the polytetrafluoroethylene resin powder, the catalyst powder with the function of decomposing dioxin, and petroleum ether to form expanded polytetrafluoroethylene materials;

[0033] 2. Compaction and calendering: The expanded polytetrafluoroethylene material is pressed into a cylindrical blank on a compactor at 25°C, and the blank is extruded into a rod at a temperature of 50°C through a plunger extruder, and then passed through The calender is calendered at 50°C to form an expanded polytetrafluoroeth...

Embodiment 3

[0039] 1. Mixing materials: Evenly mix expanded polytetrafluoroethylene resin powder (CD123, Japan Asahi Glass Co., Ltd.) and catalyst powder (20 nanometers in diameter, provided by Northwest Research Institute of Chemical Industry) with a function of decomposing dioxins at a weight percentage of 1:0.4, Then add kerosene, the weight ratio of expanded polytetrafluoroethylene resin powder to kerosene is 1: 0.28, mix evenly, stand at a temperature of 40°C for 144 hours, and then stand at a temperature of 80°C for 16 hours to make polytetrafluoroethylene Tetrafluoroethylene resin powder, dioxin-decomposing catalyst powder, and petroleum ether are fully mixed to form expanded polytetrafluoroethylene materials;

[0040] 2. Compaction and calendering: The expanded polytetrafluoroethylene material is pressed into a cylindrical blank on a compactor at 30°C, and the blank is extruded into a rod at a temperature of 60°C through a plunger extruder, and then passed through The calender is ...

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Abstract

Disclosed is a process for producing bulky polytetrafluoroethylene fiber with function of catalytically decomposing dioxin, including the steps of mixing bulky polytetrafluoroethylene powder and catalyst powder capable of decomposing dioxin, and then mixing liquid lubricant and thereafter preparing the fiber by processes as follows: extrusion, rolling, longitudinally drawing, sintering stereotype and splitting. The material can be widely used in the treatment of high-temperature tail dedusting and decomposition of emissions. Compared with the previous techniques, the advantages of the present invention are simple process, low cost, no pollution and the like.

Description

technical field [0001] The invention relates to a method for preparing filter materials, in particular to a method for preparing expanded polytetrafluoroethylene fibers with the function of catalytically decomposing dioxins. Background technique [0002] Municipal solid waste incineration has become one of the most important and effective technologies for waste disposal in various countries. Waste incineration treatment can not only turn waste into treasure, but also regenerate energy resources through gas-electric co-generation, and reduce the volume of waste by about 90%. However, the incineration process will inevitably produce a large amount of pollutants, such as particulate matter, acid gas, heavy metals and dioxins. These pollutants are extremely harmful to human health, and dioxin is the most harmful and the most difficult to remove. At present, the catalytic oxidation decomposition and removal technology of dioxin has been developed rapidly. The catalyst can deco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/48D01F1/10B01J31/06B01J35/06B01D53/70B01D53/86B29C43/24B29C55/06B29K27/18B29L7/00
Inventor 郭玉海来侃陈建勇孙润军马训明于立莺
Owner ZHEJIANG SCI-TECH UNIV
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