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Method for preparing high-purity zinc oxide by using zinc-acetate-carrying waste activated carbon

A technology of waste activated carbon and zinc acetate, which is applied in the field of comprehensive recycling and utilization of waste resources, can solve the problems of high thermal regeneration temperature, complicated processing procedures, and long processing time, and achieve high quality, reduce environmental pollution, and strengthen practical and environmental protection. Effect

Inactive Publication Date: 2016-06-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the conventional thermal regeneration method is still the current mainstream activated carbon regeneration method, which is indispensable for industrial production, but there are also many defects, such as the "regeneration method of spent catalyst" disclosed in patent 200810058055.2. The loaded zinc oxide photocatalyst was prepared at the same time as the spent catalyst, but it was treated by four-stage heat regeneration, 200~220°C for 30~60min, 200~250°C for 20~40min, 380~410°C for 40~60min, 800 Heat preservation at ~850°C for 20~40min, the processing procedure is complicated, the heat regeneration temperature is high, the processing time is long, and then it needs to be washed and dried

Method used

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  • Method for preparing high-purity zinc oxide by using zinc-acetate-carrying waste activated carbon
  • Method for preparing high-purity zinc oxide by using zinc-acetate-carrying waste activated carbon
  • Method for preparing high-purity zinc oxide by using zinc-acetate-carrying waste activated carbon

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Effect test

Embodiment 1

[0021] The method for preparing high-purity zinc oxide by using waste activated carbon loaded with zinc acetate, its concrete steps are as follows:

[0022] (1) Using waste activated carbon loaded with zinc acetate as raw material, microwave regeneration treatment is carried out by controlling the heating rate of an industrial microwave oven at 10°C / min, the microwave roasting temperature at 400°C, and the holding time of 40 minutes; the waste activated carbon loaded with zinc acetate includes the following mass percentages Composition: Carbon 60%, Zn5%, P1%, Na, Ca, Al, Si impurity elements accounted for 0%;

[0023] (2) After the regeneration treatment in step (1), it is naturally cooled at room temperature to produce a product in which the upper layer is zinc oxide and the lower layer is regenerated activated carbon, and finally separated to obtain zinc oxide and regenerated activated carbon.

[0024] The iodine adsorption value of the regenerated activated carbon obtained ...

Embodiment 2

[0026] The method for preparing high-purity zinc oxide by using waste activated carbon loaded with zinc acetate, its concrete steps are as follows:

[0027] (1) Using waste activated carbon loaded with zinc acetate as raw material, microwave regeneration treatment is carried out by controlling the heating rate of an industrial microwave oven at 60°C / min, the microwave roasting temperature at 600°C, and the holding time for 30 minutes; the waste activated carbon loaded with zinc acetate includes the following mass percentages Components: Carbon 75%, Zn8%, P2%, Na, Ca, Al, Si impurity elements accounted for 1%;

[0028] (2) After the regeneration treatment in step (1), it is naturally cooled at room temperature to produce a product in which the upper layer is zinc oxide and the lower layer is regenerated activated carbon, and finally separated to obtain zinc oxide and regenerated activated carbon.

[0029] The iodine adsorption value of the regenerated activated carbon obtained ...

Embodiment 3

[0031] The method for preparing high-purity zinc oxide by using waste activated carbon loaded with zinc acetate, its concrete steps are as follows:

[0032] (1) Using waste activated carbon loaded with zinc acetate as raw material, the heating rate of industrial microwave ovens is controlled to 110°C / min, and the microwave roasting temperature is 800°C ， The holding time is 20min for microwave regeneration treatment; the waste activated carbon loaded with zinc acetate includes the following mass percentage components: carbon 85%, Zn10%, P3%, Na, Ca, Al, Si impurity elements account for 2%, and the waste activated carbon loaded with zinc acetate SEM picture as figure 1 shown;

[0033] (2) After the regeneration treatment in step (1), it is naturally cooled at room temperature to produce a product in which the upper layer is zinc oxide and the lower layer is regenerated activated carbon, and finally separated to obtain zinc oxide and regenerated activated carbon.

[0034] The ...

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Abstract

The invention relates to a method for preparing high-purity zinc oxide by using zinc-acetate-carrying waste activated carbon, belonging to the technical field of waste resource comprehensive recycling. The method comprises the following steps: by using zinc-acetate-carrying waste activated carbon as the raw material, carrying out microwave regeneration treatment, wherein the heating rate of the industrial microwave oven is controlled at 10-110 DEG C / minute, the microwave roasting temperature is 400-800 DEG C, and the holding time is 20-40 minutes; and after the regeneration treatment, naturally cooling at room temperature to generate a product of which the upper layer is zinc oxide and the lower layer is regenerated activated carbon, and finally, separating to obtain the zinc oxide and regenerated activated carbon. According to the method, the spent catalyst generated in the vinyl acetate production process is used as the raw material, and the microwave heating rate, roasting temperature and holding time are controlled in an air atmosphere to implement the regeneration of the zinc-acetate-carrying spent catalyst and the preparation of the high-purity zinc oxide, thereby providing a novel method for the reutilization of waste and preparation of high-purity zinc oxide, and further promoting the green development of activated carbon material and nonferrous metal zinc industries.

Description

technical field [0001] The invention relates to a method for preparing high-purity zinc oxide by utilizing waste activated carbon loaded with zinc acetate, and belongs to the technical field of comprehensive recovery and utilization of waste resources. Background technique [0002] Activated carbon is an artificial carbon material product with a highly developed pore structure and a large specific surface area. It can adsorb various substances from the gas phase or liquid phase and has a strong adsorption capacity. As people's requirements for environmental protection become higher and higher, The application field of activated carbon is also constantly expanding. However, the adsorption capacity of activated carbon is not permanent. With the continuous wear and consumption of activated carbon in the practical process, long-term adsorption leads to pore blockage and saturation of adsorbate, etc., the adsorption capacity of activated carbon will decrease. Gradually decline un...

Claims

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Application Information

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IPC IPC(8): C01G9/02B01J20/34
CPCC01G9/02B01J20/3416C01P2004/03
Inventor 张利波马爱元彭金辉郑雪梅夏洪应李国江程松刘超陈伟恒
Owner KUNMING UNIV OF SCI & TECH
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