Solid acid catalyst and application of solid acid catalyst in synthesis of reproducible diesel oil or aviation kerosene
A solid acid catalyst and catalyst technology, applied in physical/chemical process catalysts, organic chemistry, petroleum industry, etc., can solve the problem of high cost of Nafion-212 catalyst, achieve excellent substrate universality, cheap and easy-to-obtain raw materials, and synthesize The effect of simple method
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Embodiment 1-13
[0018] Preparation of Catalyst Precursor by Hydrothermal Synthesis
[0019] Firstly, commercial titanium dioxide is added to a certain amount of sodium hydroxide solution, and then the mixture is mixed evenly and then transferred to a hydrothermal kettle, and then hydrothermal reaction is carried out at a certain temperature. After the crystallization is completed, lift the hydrothermal kettle and let it stand at room temperature, pour out the supernatant, wash the crystallized product with a large amount of deionized water until neutral, and then treat the crystallized product with a certain concentration of nitric acid (or sulfuric acid, phosphoric acid) aqueous solution The catalyst precursor is ion-exchanged, and the acidified product is washed again to neutrality. Finally, after drying, the target catalyst proton type titanium dioxide nanotube can be obtained. Treating the hydrothermally obtained ionic titanate with nitric acid at different pH values will yield proton-...
Embodiment 12-20
[0025] Catalytic Activity Evaluation of Ionic Titanate Nanotubes Hydrothermally Synthesized by Different Acid Treatment
[0026] Table 2 shows the catalytic activity evaluation results of the proton titanate nanotubes obtained by ion exchange with different concentrations and different types of acid solutions. The alkylation reaction of 2-methylfuran and n-butyraldehyde was used as a model reaction when evaluating the catalytic activity of different catalysts. Add 0.15 g of catalyst, 3.28 g of 2-methylfuran (40 mmol) and 1.44 g of butyraldehyde (20 mmol) into a 50 mL round bottom flask, and stir for 2 hours in a constant temperature water bath.
[0027] Table 2. Effects of different acid treatments on the reactivity of alkylation
[0028]
[0029] Note: The hydrothermal synthesis conditions of the ionic titanate obtained in the examples are: 5 grams of titanium dioxide, 70 mL of 10 mol / L NaOH aqueous solution, 150 °C hydrothermal for 20 hours; Type titania nanotubes were ...
Embodiment 21-36
[0032] Evaluation of the reactivity of 2-methylfuran and n-butyraldehyde
[0033] The catalyst evaluation of the present invention is carried out in a round bottom flask equipped with a condensing reflux device, and the temperature is controlled by a constant temperature water bath. The experimental process is as follows: Add a certain mass of catalyst, 3.28 grams of 2-methylfuran (40 mmol), and 1.44 grams of butyraldehyde (20 mmol) into a 50 mL round bottom flask, and react at a certain temperature for a certain period of time. Finally, the product was quantitatively analyzed by high performance liquid chromatography (HPLC).
[0034] 1) The effect of different alkylation reaction temperatures on the activity of proton-type titania nanotubes is shown in Table 3.
[0035] Table 3. Effect of different reaction temperatures on catalytic activity
[0036]
[0037] Note: The hydrothermal synthesis conditions of the ionic titanate obtained in the examples are: 5 grams of titani...
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