Transition metal catalyst for gas phase synthesis of N-alkylaniline by aniline and alcohol
A transition metal, gas phase synthesis technology, applied in physical/chemical process catalysts, molecular sieve catalysts, amino compounds prepared from amines, etc., can solve the problems of failure to realize industrialization, poor selectivity of gas phase catalysts, etc., and achieve easy separation and selectivity High, low dosage effect
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example 1
[0022] Example 1, aniline and methyl alcohol synthesize N-methylaniline in gas phase normal pressure on Cu / SBA-15 catalyst:
[0023] Add 2g of surfactant P123 into 80ml of 2mol / L hydrochloric acid solution at 35°C and stir for 2 to 3 hours until the surfactant is completely dissolved and dispersed evenly; add 4.25g of ethyl orthosilicate and stir at the same temperature 24 hours. Place at 100°C for 48 hours for hydrothermal reaction, quench, filter, wash until neutral, filter with suction, dry naturally, and bake in a muffle furnace at 550°C for 6 hours.
[0024] Dissolve a certain amount of copper nitrate in water, impregnate an equal volume of SBA-15 molecular sieve for 12 hours, dry in a water bath at 100°C, dry in an oven at 120°C for 4 hours, and bake at 500°C for 4 hours. Press Cu / SBA-15 into tablets and tamp to 20-40 mesh.
[0025] Put 3ml of SBA-15 Cu catalyst into a reaction tube with an inner diameter of 12mm, heat to 300°C under nitrogen purge, change to hydrogen,...
example 2
[0027] Example 2, aniline and ethanol synthesize N-ethylaniline in gas phase normal pressure on Cu / SBA-15 catalyst:
[0028] Methanol is changed into ethanol, and other conditions are identical with example 1. The reaction results are listed in Table 1.
example 3
[0029] Example 3, aniline and methanol in Cu / SBA-15-V 2 o 5 Catalyst synthesis of N-methylaniline in the gas phase at normal pressure:
[0030] Dissolve a certain amount of ammonium vanadate in water, impregnate an equal volume of SBA-15 molecular sieve for 12 hours, dry in a water bath at 100°C, dry in an oven at 120°C for 4 hours, and bake at 500°C for 4 hours. Then, dip into the copper nitrate solution. Other conditions are identical with example 1. The reaction results are listed in Table 1.
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