Catalyst for hydrogenation to prepare isopropyl benzene
A catalyst, cumene technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as low cumene selectivity, and achieve high Active and selective, good effect
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Embodiment 1
[0050] 1. Catalyst preparation
[0051] A cylindrical alumina carrier with a length of 5mm and a diameter of 2mm (specific surface is 125 meters) 2 / G, pore volume 0.46ml / g) 1L, mixed with 500ml of calcium nitrate aqueous solution containing 0.30g of Ca, dried at 80°C for 4 hours, calcined at 450°C for 4 hours, and then combined with palladium chloride containing 2.7g of Pd with hydrochloric acid Mix 500 ml of the aqueous solution adjusted to pH=3, dry at 80°C for 4 hours, and calcinate at 450°C for 4 hours to obtain the desired catalyst (Pd content: 2.7 g / l, Ca content: 0.30 g / l).
[0052] 2. Catalyst evaluation
[0053] Take 40ml of catalyst and fill it in a fixed bed reactor, activate it at 50°C for 4 hours in a hydrogen atmosphere of 0.4MPa, and then proceed to react. The reaction conditions are as follows: the reaction temperature is 45°C, the reaction pressure is 0.3MPa, the molar ratio of hydrogen to AMS in the reaction raw materials is 1.2, and the liquid space velocity of t...
Embodiment 2
[0056] 1. Catalyst preparation
[0057] A cylindrical alumina carrier with a length of 5mm and a diameter of 2mm (specific surface is 125 meters) 2 / G, pore volume 0.46ml / g) 1L, mixed with 500ml of ammonium molybdate aqueous solution containing 0.30g of Mo, dried at 80°C for 4 hours, calcined at 450°C for 4 hours, and then used together with palladium chloride containing 2.7g of Pd Mix 500 ml of an aqueous solution adjusted to pH=3 with hydrochloric acid, dry at 80°C for 4 hours, and calcinate at 450°C for 4 hours to obtain the desired catalyst (Pd content: 2.7 g / l, Mo content: 0.30 g / l).
[0058] 2. Catalyst evaluation
[0059] See Example 1 for the catalyst evaluation method.
[0060] For the convenience of comparison, the composition and evaluation results of the catalyst are listed in Table 1.
Embodiment 3
[0062] 1. Catalyst preparation
[0063] A cylindrical alumina carrier with a length of 5mm and a diameter of 2mm (specific surface is 125 meters) 2 / G, pore volume 0.46ml / g) 1L, mixed with calcium nitrate containing 0.24g Ca and 500ml ammonium molybdate aqueous solution containing 0.06g Mo, dried at 80°C for 4 hours, calcined at 450°C for 4 hours, and then mixed with 2.7 g of Pd palladium chloride and 500 ml of an aqueous solution adjusted to pH=3 with hydrochloric acid were mixed, dried at 80°C for 4 hours, and calcined at 450°C for 4 hours to obtain the required catalyst (Pd content of 2.7 g / L, Ca content of 0.24 G / L, the Mo content is 0.06 g / L).
[0064] 2. Catalyst evaluation
[0065] See Example 1 for the catalyst evaluation method.
[0066] For the convenience of comparison, the composition and evaluation results of the catalyst are listed in Table 1.
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