Carbon-coated aluminum oxide carrier with bimodal pore structure, and preparation method thereof
A carbon-alumina, bimodal pore technology, applied in the field of carbon-coated alumina carrier and its preparation, can solve problems such as inapplicability, and achieve the effects of simple equipment, economical cost saving, and high mechanical strength
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[0026] Example 1 Preparation of ammonium aluminum carbonate A1
[0027] Weigh 100g of aluminum hydroxide dry rubber powder (Yantai Henghui Chemical Co., Ltd.), 310g of ammonium bicarbonate (product of Beijing Chemical Factory) and 15mL of polyethylene glycol (PEG-400, Tianjin Guangfu Chemical Reagent Factory) into 600mL of deionized water Stir, then transfer the mixture into a 1L airtight pressure vessel lined with polytetrafluoroethylene, settle at 100°C for 8 hours, filter and dry the white filter cake obtained at 100°C for 4 hours to obtain ammonium aluminum carbonate A1.
Example Embodiment
[0028] Example 2 Preparation of ammonium aluminum carbonate A2
[0029] Weigh 400g of aluminum nitrate (product of Beijing Chemical Plant), 300g of ammonium bicarbonate, and 15mL of polyethylene glycol, mix and grind for 20 minutes, and then transfer the mixture into a 1L sealed pressure vessel with PTFE lined at 100°C Precipitate for 8 hours, filter and dry the obtained white filter cake at 100°C for 4 hours to obtain aluminum ammonium carbonate A2.
Example Embodiment
[0031] Example 3
[0032] The weight ratio of hydrated alumina and ammonium aluminum carbonate is 1:9, and the ratio of the total weight of hydrated alumina and ammonium aluminum carbonate to the carbon precursor is 7:3. Weigh 10g pseudo-boehmite dry rubber powder (Shanghai Xinnian Petrochemical Auxiliary Factory), mix with 90g aluminum ammonium carbonate A1, use 30g glucose (Tianjin Guangfu Chemical Reagent Factory) as the carbon precursor and 2.5g concentrated nitric acid (quality The fraction is 69.2%, the product of Beijing Chemical Plant) and 80g deionized water are mixed to form a solution, then mixed and stirred into a plastic body, extruded into a Ф1.2mm strip on an extruder, dried at 100°C for 4 hours, and then dried in N 2 The atmosphere was raised from room temperature to 550°C for one hour and maintained for 4 hours to obtain a carbon-coated alumina carrier a. The physical and chemical properties are shown in Table 1.
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