Method for preparing carbon-containing catalyst
A catalyst and catalyst carrier technology, applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve problems such as high cost, difficulty in large-scale industrialization, and complicated preparation process
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[0030] 2. Add in the preparation process of alumina dry rubber powder, such as introducing by co-precipitation or step-by-step precipitation. Then, the carbon-free alumina carrier is obtained by extruding the alumina dry rubber powder, drying and calcining.
[0031] 3. Add the acid solution to the alumina dry rubber powder, knead until it becomes a plastic body, extrude it on an extruder, then dry and roast it to make a carrier. Then impregnate the alumina support strip with a solution containing VIB and / or VIII metal components, dry and calcinate to make a carbon-free alumina support.
[0032] One or more of extrusion aids, adhesives, peptizers, and other additives required for the catalyst can be added to the above-mentioned alumina dry rubber powder, and the amount added can be determined according to the properties of the prepared catalyst according to the knowledge in the art. The alumina dry rubber powder used is the pseudo-boehmite produced by the aluminum chloride-amm...
Embodiment 1
[0040] This example introduces the preparation of carbon-free alumina carrier by using pseudo-boehmite dry rubber powder. Dry rubber powder specific surface area is 370m 2 / g, the pore volume is 0.90ml / g.
[0041] Weigh 300g of dry rubber powder, add 100g of SB powder, add 6g of citric acid and 6g of safflower powder, mix well, add 345g of acidic solution, HNO in the acidic solution 3 The concentration is 1.74%, and the rest is distilled water. After rolling for 20 minutes, extrude the strips with a clover orifice plate with a diameter of 1.7mm. After drying at 120°C for 4h and then calcining at 500°C for 3h, the obtained alumina carrier bar is marked as A.
Embodiment 2
[0043] This example introduces the preparation of carbon-free support by using pseudo-boehmite dry rubber powder and nickel nitrate. Dry rubber powder specific surface area is 370m 2 / g, the pore volume is 0.90ml / g.
[0044] Weigh 300g of dry rubber powder, add 100g of SB powder, add 6g of citric acid and 6g of safflower powder, mix well, add 345g of acidic solution, HNO in the acidic solution 3 The concentration is 1.74%, the nickel nitrate content is 3.9%, and the rest is distilled water. After rolling for 20 minutes, extrude the strips with a clover orifice plate with a diameter of 1.7mm. Dry at 120°C for 4h, then bake at 500°C for 3h, and the obtained carrier bar is marked as B.
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