Nano gold catalyst carrier activated carbon pretreatment method and method for preparing catalyst by loading
A catalyst carrier, activated carbon technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high reagent concentration, drying energy consumption, and large washing water consumption problems, to achieve the effect of reducing dosage, reducing production energy consumption, and strong gold-carrying capacity
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Embodiment 1
[0024] (1) Add 10 g of activated carbon to 100 mL of HCl solution with a mass concentration of 3%, stir for 2 hours at 70° C. at a stirring rate of 300 rpm, vacuum filter the feed liquid, and use 100 mL of pure water or NaHCO with pH=9 each time 3 The solution was repeatedly stirred to wash the activated carbon filter cake until the pH of the washing filtrate was 4.2, 5 g of wet carbon was taken and dried, and the calculated water content was 64.2%. The rest of the wet charcoal was refrigerated at 2°C for later use;
[0025] The specific surface area of the activated carbon is 750m 2 / g, pore size 0.5nm, specific surface area of activated carbon after treatment is 930m 2 / g, pore size 0.9nm;
[0026] (2) Put 13.75g of wet carbon into 500mL of nano-gold dispersion with a concentration of 50mg / L, stir and mix the load at room temperature for 3 hours at a stirring rate of 250rpm, filter, collect the loaded filtrate, and wash the filter cake 10 times with 50mL pure water , ...
Embodiment 2
[0029] (1) 20g of activated carbon is added to 100mL of HNO with a mass concentration of 5%. 3 In the solution, stir at 60°C for 4 hours, the stirring rate is 400rpm, vacuum filter the feed liquid, and wash the activated carbon filter cake repeatedly with 200mL pure water or NaOH solution with pH = 8, 9, 10, 11 each time until it is washed Filtrate pH = 4.5, take 5g of wet charcoal and dry it, the calculated moisture content is 60.9%, and the rest of the wet charcoal is refrigerated at 2°C for later use;
[0030] The specific surface area of the activated carbon is 980m 2 / g, pore size 0.7nm, specific surface area of activated carbon after treatment is 1490m 2 / g, pore size 1.92nm;
[0031] (2) Put 13.5g of wet carbon into 500mL of nano-gold dispersion with a concentration of 78mg / L, stir, mix and load at 2°C for 2 hours at a stirring rate of 300rpm, filter, and collect the loaded filtrate. Wash the filter cake 8 times with 50mL pure water, seal the filter cake and stor...
Embodiment 3
[0034] (1) adding 10g gac to 200mL mass concentration is 20% HClO 4 In the solution, stir at 40°C for 3 hours, the stirring rate is 400rpm, vacuum filter the feed liquid, and use 100mL pure water or Na with pH=9, 10, 11 each time 2 CO 3 The solution was repeatedly stirred to wash the activated carbon filter cake until the pH of the washing filtrate was 4.08, and 5 g of wet carbon was taken and dried, and the calculated moisture content was 63.65%, and the rest of the wet carbon was refrigerated at 2°C for later use;
[0035] The specific surface area of the activated carbon is 1000m 2 / g, pore size 0.7nm, specific surface area of activated carbon after treatment is 1310m 2 / g, pore size 1.25nm;
[0036] (2) 60g of wet carbon is put into 500mL concentration of gold nano-dispersion liquid of 500mg / L, stirred and mixed at room temperature for 4 hours, stirring speed is 200rpm, filters, collects the loaded filtrate, washes the filter cake 10 times with 50mL pure water, Sea...
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