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Method for preparing polyester textile waste-based activated carbon by using bittern solution as a templating-chemical activating agent

A technology of chemical activator and textile waste, applied in the direction of chemical instruments and methods, inorganic chemistry, other chemical processes, etc., can solve the problems of cumbersome preparation process, single pore size distribution, high cost of raw materials, etc.

Active Publication Date: 2017-06-30
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to solve the deficiencies in the prior art, such as high raw material cost, cumbersome preparation process, and single pore size distribution in the current resource utilization of polyester textile waste and activated carbon preparation technology. A method for preparing polyester textile waste-based activated carbon with an activator. This method uses cheap brine solution as a template-activator, and uses a one-step pyrolysis method to prepare polyester textile waste into activated carbon with a high specific surface area. Therefore, it has the advantages of low cost, simple preparation process, and The advantage of high efficiency, the prepared polyester textile waste-based activated carbon has a micro-mesoporous structure of 1.2-1.8nm and 20-40nm, which can be used as an adsorption material, and has a good effect on Cr 6+ (hereinafter referred to as Cr(VI)) has a fast adsorption rate and a large adsorption capacity. It achieves the purpose of "using waste to treat waste" while recycling polyester textile waste.

Method used

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  • Method for preparing polyester textile waste-based activated carbon by using bittern solution as a templating-chemical activating agent
  • Method for preparing polyester textile waste-based activated carbon by using bittern solution as a templating-chemical activating agent
  • Method for preparing polyester textile waste-based activated carbon by using bittern solution as a templating-chemical activating agent

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Experimental program
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Effect test

Embodiment 1

[0041] A kind of method utilizing template-chemical activation method to prepare polyester textile waste-based activated carbon, specifically comprises steps as follows:

[0042] (1) Pretreatment of polyester textile waste

[0043] Wash and dry the polyester textile waste, cut it into small pieces of 1cm×1cm, put it in a muffle furnace at a controlled temperature of 260°C, and stay there for 0.5h until it melts. After it cools down naturally, put it in an agate mortar and grind it into powder to obtain polyester powder;

[0044] The polyester powder obtained above has ash content of 0.52%, volatile content of 88.39%, fixed carbon content of 10.71%, and percentages of C, H, O, N, and S elements in the polyester powder are 63.51%, 5.11%, and 24.12% respectively. %, 6.43%, 0.11%;

[0045] (2), brine dipping

[0046] Pour 3g of the polyester powder obtained in step (1) into 60mL of bittern solution, and mix evenly in a mixer with a rotational speed of 100r / min, then place it st...

Embodiment 2

[0052] A kind of method utilizing template-chemical activation method to prepare polyester textile waste-based activated carbon, specifically comprises steps as follows:

[0053] (1) Pretreatment of polyester textile waste

[0054] Wash and dry the polyester textile waste, cut it into small pieces of 1cm×1cm, put it in a muffle furnace at a controlled temperature of 260°C, and stay there for 0.5h until it melts. After it cools down naturally, put it in an agate mortar and grind it into powder to obtain polyester powder;

[0055] The polyester powder obtained above has ash content of 0.52%, volatile content of 88.39%, fixed carbon content of 10.71%, and percentages of C, H, O, N, and S elements in the polyester powder are 63.51%, 5.11%, and 24.12% respectively. %, 6.43%, 0.11%;

[0056] (2), brine dipping

[0057] Pour 3g of the polyester powder obtained in step (1) into 45mL of bittern solution, and mix evenly in a mixer with a rotational speed of 100r / min, then place it st...

Embodiment 3

[0064] A kind of method utilizing template-chemical activation method to prepare polyester textile waste-based activated carbon, specifically comprises steps as follows:

[0065] (1) Pretreatment of polyester textile waste

[0066] Wash and dry the polyester textile waste, cut it into small pieces of 1cm×1cm, put it in a muffle furnace at a controlled temperature of 260°C, and stay there for 0.5h until it melts. After it cools down naturally, put it in an agate mortar and grind it into powder to obtain polyester powder;

[0067] The polyester powder obtained above has ash content of 0.52%, volatile content of 88.39%, fixed carbon content of 10.71%, and percentages of C, H, O, N, and S elements in the polyester powder are 63.51%, 5.11%, and 24.12% respectively. %, 6.43%, 0.11%;

[0068] (2), brine dipping

[0069] Pour 3g of the polyester powder obtained in step (1) into 30mL of bittern solution, and mix evenly in a mixer with a rotational speed of 100r / min, then place it st...

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Abstract

The invention discloses a method for preparing polyester textile waste-based activated carbon by using a bittern solution as a templating-chemical activating agent. According to the method, porous activated carbon is prepared by using polyester textile waste as a precursor of carbon and the bittern solution as the templating agent; magnesium chloride is contained in the bittern solution, the bittern solution and the polyester textile waste are mixed and pyrolyzed to form carbon-coated magnesium oxide, and after magnesium oxide particles are dissolved by hydrochloric acid, mesoporous structures with the sizes of 20-40 nanometers are formed on the surface of the carbon; meanwhile, the magnesium chloride has a chemical activating effect, a large number of microporous structures with the sizes of 1.2-1.8 nanometers are formed inside the activated carbon and on the surface of the activated carbon. The specific surface area of the activated carbon prepared by the method is 601-1398 m<2> / g. The preparation method has the advantages of low cost and high efficiency; as an adsorbent material, the obtained activated carbon is high in Cr(VI) adsorption rate and large in Cr(VI) adsorption capacity; the purpose of treating wastes by wastes is achieved while resource utilization of the polyester textile waste is achieved.

Description

technical field [0001] The invention relates to the field of resource utilization of polyester textile waste and preparation of activated carbon, in particular to a method for preparing activated carbon based on polyester textile waste by using brine solution as a template-chemical activator. Background technique [0002] The annual output of waste textiles in my country has reached 26 million tons, of which natural fibers account for about 30%, chemical fibers account for about 70%, and the comprehensive recycling rate is less than 10%. A large number of waste textiles have seriously polluted the environment. Therefore, suitable methods are needed to deal with this part of solid waste. If polyester textile waste can be used to make activated carbon, it can not only achieve the purpose of waste resource utilization, but also reduce the production cost of activated carbon. [0003] Activated carbon has a rich pore structure and oxygen-containing functional groups, which can b...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/348B01J20/20B01J20/30C02F1/28C02F101/22
CPCB01J20/20C01P2002/72C01P2004/03C01P2004/04C01P2006/12C01P2006/16C02F1/283C02F2101/22
Inventor 许智华张道方袁志航金小颖陈维芳张天琦邓海轩田丹琦
Owner UNIV OF SHANGHAI FOR SCI & TECH
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