Silver catalyst for producing ethylene oxide through ethylene epoxidation and preparation method and application thereof
A technology for ethylene epoxidation and silver catalyst, applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, bulk chemical production, etc., can solve the problem of uneven particle size distribution of active components, etc. problem, to achieve the effect of high catalytic activity and selectivity, uniform size and uniform distribution
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Embodiment 1
[0057] Dissolve 200g of pyridine and 1000g of 1,4-butanediamine in 1500g of deionized water, slowly add silver oxalate into the mixture while stirring, keep the temperature below 30°C, and add the amount of silver oxalate so that the final impregnation solution Contains 24% silver (weight). After the silver amine solution is prepared, keep the existing temperature, add 15.0g of cesium sulfate, 2.8g of calcium nitrate, 1.4g of ammonium perrhenate and 0.5g of cerium sulfate, then add 200g of citric acid, and finally add deionized Water makes the total mass of the solution reach 5000g, and it is prepared as an impregnating solution for use.
[0058] Take 2500g of the carrier sample and put it into a container, evacuate until the vacuum degree is lower than 10mmHg, put the above impregnation solution into it, immerse the carrier, keep it for 30 minutes, and then leach to remove the excess impregnation solution. After the above solid was dried at 100°C for 8 hours, it was heated i...
Embodiment 2
[0060] Dissolve 500g of ethylenediamine and 800g of 1,3-propylenediamine in 1500g of deionized water, slowly add silver nitrate into the mixture under stirring, keep the temperature below 30°C, and add the amount of silver nitrate so that the final prepared The dipping solution contains 20% silver by weight. After the silver amine solution was prepared, keep the existing temperature, add 5.0g of cesium sulfate, 12.8g of barium acetate, 5.4g of perrhenic acid and 2.0g of cerium sulfate, then add 50g of acetic acid, finally add deionized water to make The total mass of the solution reaches 5000g, and it is prepared as an impregnation solution for use.
[0061] Take 2500g of the carrier sample and put it into a container, evacuate until the vacuum degree is lower than 10mmHg, put the above impregnation solution into it, immerse the carrier, keep it for 60 minutes, and then leach to remove the excess impregnation solution. The above solid was dried at 150°C for 3 hours, heated in...
Embodiment 3
[0063] Dissolve 500g of ethylenediamine and 800g of 1,3-propylenediamine in 1500g of deionized water, slowly add silver nitrate into the mixture under stirring, keep the temperature below 30°C, and add the amount of silver nitrate so that the final prepared The dipping solution contains 20% silver by weight. After the silver amine solution is prepared, keep the existing temperature, add 5.0g of cesium sulfate, 12.8g of barium acetate, 5.4g of perrhenic acid and 2.0g of cerium sulfate, then add 600g of malic acid, and finally add deionized water Make the total mass of the solution reach 5000g, and make it into an impregnating solution for later use.
[0064] Take 2500g of the carrier sample and put it into a container, evacuate until the vacuum degree is lower than 10mmHg, put the above impregnating solution into it, immerse the carrier, keep it for 90 minutes, and then leach to remove the excess impregnating solution. After the above solid was dried at 60°C for 24 hours, it w...
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