Preparation method of cycloparaffin and arene for aviation kerosene
A technology for aviation kerosene and naphthenic hydrocarbons is applied in the preparation of naphthenic and aromatic hydrocarbons for aviation kerosene, and in the fields of naphthenic compounds and aromatic compounds for aviation kerosene, and can solve the problems of low density and volume calorific value, poor sealing performance, etc.
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Embodiment 1-20
[0034] 1. Preparation of catalyst:
[0035] 1) Preparation of metal catalyst:
[0036] Raney Ni, Raney Co, and Raney Cu are commercial catalyst products purchased directly; nickel-aluminum hydrotalcite (NiAl-HT) is Ni(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O mixed solution was added dropwise with NaOH and NaCO at 3mL / min 3 In the mixed solution, the dropwise addition process was carried out under strong stirring in a water bath at 65°C. After the dropwise addition, continue to stir and age for 18 hours, then filter and wash, dry at 80°C overnight, and restore at 500°C for 2 hours before use.
[0037] The steps of the catalyst prepared by the formaldehyde liquid phase reduction method are as follows: ultrasonically disperse one or more than two types of carriers with water, drop a metal precursor solution with a weight percentage of 2%-40% at room temperature, stir for 1 hour; Add NaOH solution to adjust the pH value to 9-10; add excess formaldehyde solution while stirri...
Embodiment 21-61
[0047] 1) Use a fixed bed reactor: put 1.0g of catalyst into the reaction tube, keep the pressure in the reactor at 0.1MPa, the temperature at 60°C, and the hydrogen flow rate at 120mL / min. pumped into the reactor. The reaction results are shown in Table 2.
[0048] The influence of table 2 catalyst on the hydrogenation reaction of diacetone alcohol
[0049]
[0050]
[0051] As can be seen from Table 2, different metal catalysts all have certain activity to diacetone alcohol. Among them, Ru / C-CR has the best activity. Therefore, we used Ru / C-CR as the catalyst to investigate the effects of different hydrogen pressures, reaction temperatures, mass space velocities of reaction raw materials and catalysts, and hydrogen flow rates on the hydrogenation reaction in a fixed-bed reactor. The results are shown in Table 3.
[0052] Table 3. Effects of temperature, pressure, mass space velocity, and hydrogen flow rate on the hydrogenation reaction activity of diacetone alcohol ...
Embodiment 62-98
[0060] 3. Dehydration-Diels-Alder reaction: The MPD obtained after the hydrogenation product was purified in the previous step is used as a raw material for this reaction.
[0061] 1) Using a tank reactor: Add 45 g of raw materials and 4.5 g of catalyst into a 100 mL reactor, and stir for 6 h at 170° C. under normal pressure. The detailed reaction results are shown in Table 5.
[0062] Table 5 MPD dehydration-Diels-Alder reaction and its results
[0063]
[0064]
[0065] As can be seen from Table 5, strong acids are more conducive to the reaction, and Nafion and p-toluenesulfonic acid have the best activity. Considering that p-toluenesulfonic acid dissolves in the reaction product water after the reaction, and that p-toluenesulfonic acid itself has great pollution to the environment, we choose the solid acid Nafion as the catalyst and conduct in-depth research on it. Investigate the influence of reaction temperature, reaction pressure, reaction time and catalyst dosag...
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