Preparation method of supported expanded graphite catalyst used for treating EDTA-Cu wastewater
An expanded graphite and catalyst technology, which is applied in the field of preparation of supported expanded graphite catalysts, can solve the problems of a large area of a treatment device, a cumbersome treatment process, and limited engineering applications, and achieves low production cost, simple preparation process, and load content. high effect
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[0038] The preparation method of the loaded expanded graphite catalyst for treating EDTA-Cu wastewater of the present invention firstly prepares sulfur-free and manganese-free expanded graphite, and carries out carboxyl and amination functional modification to it, and then adopts Fe 2+ , Mg 2+ and Ni 2+ As an active component, the expanded graphite is supported, and finally calcined at a high temperature to obtain an excellent supported expanded graphite catalyst, which specifically includes the following steps:
[0039] S1, preparation of catalyst carrier sulfur-free and manganese-free expanded graphite:
[0040] The raw materials used are: natural flake graphite (32 orders, carbon content ≥ 99.99%), ammonium nitrate (content ≥ 98.5%), perchloric acid (mass fraction is 72%); the consumption ratio of the above-mentioned raw materials is: natural flake graphite: Ammonium nitrate: perchloric acid=1~2.5 (g): 0.5~2.5 (g): 3~9 (mL);
[0041] S11, preparing expandable graphite: ...
Embodiment 1
[0059] S1, preparation of catalyst carrier sulfur-free and manganese-free expanded graphite:
[0060] S11, preparing expandable graphite:
[0061] Pipette 3mL of perchloric acid into a clean and dry 250mL beaker, slowly add 0.5g of ammonium nitrate solid, stir and dissolve with a glass rod, then add 1g of natural flake graphite, put it into a magnetic rotor, seal the beaker with a parafilm, and then place In the collector-type constant temperature heating magnetic stirrer, set the water bath temperature to 30°C, adjust the rotation speed to 200r / min, and stir for 75min; after the reaction is complete, immediately take out the beaker, place it in a fume hood, open the beaker sealing film, and cool to After room temperature, use tweezers to take out the magnetic rotor, and then rinse the mixture with deionized water several times until the pH of the rinse water is about 6; use a circulating water vacuum pump to filter the washed mixture, and then transfer the intercepted mixture...
Embodiment 2
[0076] S1, preparation of catalyst carrier sulfur-free and manganese-free expanded graphite:
[0077] S11, preparing expandable graphite:
[0078] Pipette 6mL of perchloric acid into a clean and dry 250mL beaker, slowly add 0.15g of ammonium nitrate solid, stir and dissolve with a glass rod, then add 2g of natural flake graphite, put it into a magnetic rotor, seal the beaker with a parafilm, and then place In the collector-type constant temperature heating magnetic stirrer, set the temperature of the water bath to 40°C, adjust the rotation speed to 250r / min, and stir for 60 minutes; after the reaction is completed, immediately take out the beaker, place it in a fume hood, open the beaker sealing film, and cool to After room temperature, use tweezers to take out the magnetic rotor, and then rinse the mixture with deionized water several times until the pH of the rinse water is about 6; use a circulating water vacuum pump to filter the washed mixture, and then transfer the inter...
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