Method for synthesizing 1,3-butadiene by Bi/Mo/La three-component composite oxide catalyst
A composite oxide and catalyst technology, applied in the field of chemistry and chemical industry, can solve problems such as serious temperature rise, and achieve the effect of high activity and selectivity
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Embodiment 1
[0031] Catalyst preparation process
[0032] 9.7g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 50mL of 10% nitric acid solution, this solution was denoted as solution A, and 0.87g La(NO 3 )·6H 2 O was dissolved in 200mL deionized water, and this solution was recorded as solution B. In a water bath at 60°C, 3.53g (NH 4 ) 2 Mo 7 o 24 4H 2 O was dissolved in 200 mL of deionized water, and this solution was recorded as solution C, in which the molar ratio of molybdenum to bismuth was 1:1, and the molar ratio of lanthanum to bismuth was 0.1:1. Add B dropwise to C and stir well. Add A dropwise to the above mixed solution, after fully stirring, dropwise add ammonia solution with a mass fraction of 25% in the mixed solution of the three salts, adjust the pH value to 5, after the dropwise addition, continue to Stir in a water bath at 60°C until viscous, transfer the viscous material to a drying oven at 100°C for drying, bake in a tube furnace with an oxygen atmosphere at 550°C for 4 ...
Embodiment 2
[0037] Catalyst preparation process
[0038] 9.7gBi(NO 3 ) 3 ·5H 2 O was dissolved in 50mL of 10% nitric acid solution, this solution was denoted as solution A, and 2.60g of La(NO 3 )·6H 2 O was dissolved in 200mL deionized water, and this solution was denoted as solution B. In a water bath at 70°C, 3.53g (NH 4 ) 2 Mo 7 o 24 4H 2 O was dissolved in 200mL deionized water, and this solution was recorded as solution C, in which the molar ratio of molybdenum to bismuth was 1:1, and the molar ratio of lanthanum to bismuth was 0.3:1. Add B dropwise to C and stir well. Add A dropwise to the above mixed solution, after fully stirring, dropwise add ammonia solution with a mass fraction of 25% in the mixed solution of the three salts, adjust the pH value to 5, after the dropwise addition, continue to Stir in a water bath at 70°C until viscous, transfer the viscous material to a drying oven at 80°C for drying, bake in a tube furnace with an oxygen atmosphere at 500°C for 2 hour...
Embodiment 3
[0043] Catalyst preparation process
[0044] 9.7g Bi(NO 3 ) 3 ·5H 2 O was dissolved in 50mL of 10% nitric acid solution, this solution was denoted as solution A, and 3.46g La(NO 3 )·6H 2O was dissolved in 200mL deionized water, and this solution was recorded as solution B. In a water bath at 60°C, 3.53g (NH 4 ) 2 Mo 7 o 24 4H 2 O was dissolved in 200mL deionized water, and this solution was recorded as solution C, in which the molar ratio of molybdenum to bismuth was 1:1, and the molar ratio of lanthanum to bismuth was 0.4:1. Add B dropwise to C and stir well. Add A dropwise to the above mixed solution, after fully stirring, dropwise add ammonia solution with a mass fraction of 25% in the mixed solution of the three salts, adjust the pH value to 4, after the dropwise addition, continue to Stir in a water bath at 60°C until viscous, transfer the viscous material to a drying oven at 60°C for drying, bake in a tube furnace with an oxygen atmosphere at 550°C for 2 hours,...
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