Catalysts for the production of isobutene
A catalyst and isobutylene technology, applied in molecular sieve catalysts, physical/chemical process catalysts, organic chemistry, etc., can solve problems such as poor catalyst stability, and achieve good stability and good technical effects
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Embodiment 1
[0039] 1. Catalyst preparation
[0040] Dissolve ammonium metavanadate equivalent to 8 grams of V2O5, cerium nitrate equivalent to 2.5 grams of CeO2, and antimony trichloride equivalent to 3.0 grams of Sb2O5 in 40 ml of 0.25 mol / L tartaric acid aqueous solution, and mix with 86.5 grams of MCF carrier , stood at room temperature for 8 hours, then dried at 120°C for 24 hours, and finally roasted in a muffle furnace at 620°C for 6 hours to obtain the desired catalyst. For comparison, the composition of the catalyst is listed in Table 1.
[0041] 2. Catalyst evaluation
[0042] The catalyst prepared by the above-mentioned method carries out activity evaluation in the fixed-bed reactor, and the process is as follows:
[0043] The reactor is a stainless steel tube with an internal diameter of 8 mm and a length of 400 mm. The molar ratio of carbon dioxide and isobutane is 5.0, the reaction temperature is 575° C., the mass space velocity of isobutane is 0.8 h −1 , and the reaction p...
Embodiment 2
[0060] 1. Catalyst preparation
[0061] Dissolve ammonium metavanadate equivalent to 8 grams of V2O5, neodymium nitrate equivalent to 2.5 grams of Nd2O3, and antimony trichloride equivalent to 3.0 grams of Sb2O5 in 40 ml of 0.25 mol / L tartaric acid aqueous solution, and mix with 86.5 grams of MCF carrier , stood at room temperature for 8 hours, then dried at 120°C for 24 hours, and finally roasted in a muffle furnace at 620°C for 6 hours to obtain the desired catalyst. For comparison, the composition of the catalyst is listed in Table 1.
[0062] 2. Catalyst evaluation
[0063] The catalyst prepared by the above-mentioned method carries out activity evaluation in the fixed-bed reactor, and the process is as follows:
[0064] The reactor is a stainless steel tube with an internal diameter of 8 mm and a length of 400 mm. The molar ratio of carbon dioxide and isobutane is 5.0, the reaction temperature is 575° C., the mass space velocity of isobutane is 0.8 h −1 , and the reacti...
Embodiment 3
[0067] 1. Catalyst preparation
[0068] Dissolve ammonium metavanadate equivalent to 8 grams of V2O5, neodymium nitrate equivalent to 1.0 grams of Nd2O3, cerium nitrate equivalent to 1.5 grams of CeO2, and antimony trichloride equivalent to 3.0 grams of Sb2O5 in 40 ml of 0.25 mol / L tartaric acid In the aqueous solution, mix with 86.5 grams of MCF carrier, let it stand at room temperature for 8 hours, then dry at 120°C for 24 hours, and finally roast in a muffle furnace at 620°C for 6 hours to obtain the required catalyst. For the convenience of comparison, the composition of the catalyst is listed in Table 1.
[0069] 2. Catalyst evaluation
[0070] The catalyst prepared by the above-mentioned method carries out activity evaluation in the fixed-bed reactor, and the process is as follows:
[0071] The reactor is a stainless steel tube with an internal diameter of 8 mm and a length of 400 mm. The molar ratio of carbon dioxide and isobutane is 5.0, the reaction temperature is ...
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