Method for synthesizing cyclohexylbenzene by hydroalkylation
A cyclohexylbenzene, chemical synthesis technology, applied in the directions of hydrocarbons, hydrocarbons, chemical instruments and methods, can solve the problems of poor cyclohexylbenzene selectivity, low catalyst activity, etc., to reduce the oligomerization reaction and improve the reaction. The effect of stability and inhibition of carbon deposition
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Embodiment 1
[0034] Dissolve 3.0g of aluminum oxide in 450g of water, add 16.0g of sodium hydroxide to dissolve it, then add 34.7g of hexamethyleneimine while stirring, then add 60g of solid silicon oxide, dimethyldiethoxy Silane 5.9g, the material ratio (mol ratio) of reactant is:
[0035] SiO 2 / Al 2 o 3 =30
[0036] NaOH / SiO 2 =0.2
[0037] Dimethyldiethoxysilane / SiO 2 =0.04
[0038] Hexamethyleneimine / SiO 2 =0.35
[0039] h 2 O / SiO 2 =25
[0040] After the reaction mixture was evenly stirred, it was transferred to a stainless steel reaction kettle, and crystallized at 145° C. for 70 hours while stirring. After taking out, it is filtered, washed and dried. SiO was obtained by chemical analysis 2 / Al 2 o 3 The molar ratio was 30.1.
[0041] After drying the sample was determined, its Si 29 The NMR solid-state nuclear magnetic spectrum peak appears at -18.9ppm. Its X-ray diffraction data are shown in Table 1.
[0042] Table 1
[0043]
[0044] Prepare the mixed sol...
Embodiment 2
[0046] The organosilicon microporous zeolite was prepared according to the method of [Example 1]. Prepare the mixed solution of 40ml ruthenium chloride and ferric nitrate, the content of Ru is 0.25g in the solution, Fe(NO 3 ) 3 The content is 0.30g, and the molar ratio of Ru and Fe is 2. Take 32.50 g of organosilicon microporous zeolite powder samples, and spray the prepared mixed solution on the powder, stirring the organosilicon microporous zeolite continuously during the spraying process. After drying at normal temperature and pressure for 10 hours, dry at 120° C. for 10 hours, and grind into powder. Add 17.50g of alumina for mixing, and add dilute nitric acid solution for kneading and extruding into strips of φ1.6×2mm. After drying, it was calcined at 550° C. for 5 hours, then exchanged 5 times with 1M ammonium nitrate, filtered, and dried. Dry at 120°C for 12 hours and calcined at 480°C for 6 hours to prepare the desired catalyst and name it Ru-Fe / MP. Wherein, by wei...
Embodiment 3
[0048] The organosilicon microporous zeolite was prepared according to the method of [Example 1]. Prepare the mixed solution of 40ml ruthenium chloride and copper nitrate, the content of Ru is 0.25g in the solution, Cu(NO 3 ) 2 The content of is 0.23g, and the molar ratio of Ru and Cu is 2. Take 32.50 g of organosilicon microporous zeolite powder samples, and spray the prepared mixed solution on the powder, stirring the organosilicon microporous zeolite continuously during the spraying process. After drying at normal temperature and pressure for 10 hours, dry at 120° C. for 10 hours, and grind into powder. Add 17.50g of alumina for mixing, and add dilute nitric acid solution for kneading and extruding into strips of φ1.6×2mm. After drying, it was calcined at 550° C. for 5 hours, then exchanged 5 times with 1M ammonium nitrate, filtered, and dried. Dry at 120°C for 12 hours and calcined at 480°C for 6 hours to prepare the desired catalyst and name it Ru-Cu / MP. Wherein, by ...
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