A kind of preparation method of silver-Raney copper catalyst, catalyst prepared therefrom and application
A technology of Raney copper and catalyst, which is applied in the field of preparation of silver-Raney copper catalyst, can solve the problem that silver doping content cannot be precisely controlled, and achieve high utilization rate, high operating space velocity and high copper loading capacity Effect
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Embodiment 1
[0058] (1) After crushing the copper and aluminum alloys into alloy blocks of about 0.9-3.2mm, weigh 200g of alloy blocks, and slowly add 20% sodium hydroxide (sodium hydroxide mass 200g) solution in batches, and the activation time is 2h . The catalyst treated by the above steps is washed with 1000 mL of deionized water at 20-40°C for 20-40 times until the pH of the washing solution is 8 to obtain a Raney copper catalyst;
[0059] (2) Preparation of silver solution: weigh 1.2g of silver nitrate (molar weight: 7.1mmol), add 10mL of deionized water and stir until dissolved, measure 2.3mL of ethylenediamine solution (ethylenediamine density: 0.9g / mL) Add dropwise to 10mL deionized water to form a uniform solution. The molar ratio of ethylenediamine to silver is 5:1. Add the aqueous solution of ethylenediamine to the silver nitrate solution dropwise to form a transparent and uniform solution. The solution is fixed in a 200mL volumetric flask to form a 3.0mgAg / mL solution. Silve...
Embodiment 2
[0062] (1) After crushing the copper and aluminum alloys into alloy blocks of about 0.9-3.2mm, weigh 200g of alloy blocks, and slowly add 20% sodium hydroxide (sodium hydroxide mass 200g) solution in batches, and the activation time is 2h . The catalyst treated by the above steps is washed with 1000 mL of deionized water at 20-40°C for 20-40 times until the pH of the washing solution is 8 to obtain a Raney copper catalyst;
[0063] (2) Preparation of silver solution: weigh 1.2g of silver nitrate (molar weight: 7.1mmol), add 10mL of deionized water and stir until dissolved, measure 2.3mL of ethylenediamine solution (ethylenediamine density: 0.9g / mL) Add dropwise to 10mL deionized water to form a uniform solution. The molar ratio of ethylenediamine to silver is 5:1. Add the aqueous solution of ethylenediamine to the silver nitrate solution dropwise to form a transparent and uniform solution. The solution is fixed in a 200mL volumetric flask to form a 3.0mgAg / mL solution. Silve...
Embodiment 3
[0066] (1) After crushing the copper and aluminum alloys into alloy blocks of about 0.9-3.2mm, weigh 200g of alloy blocks, and slowly add 20% sodium hydroxide (sodium hydroxide mass 200g) solution in batches, and the activation time is 2h . The catalyst treated by the above steps is washed with 1000 mL of deionized water at 20-40°C for 20-40 times until the pH of the washing solution is 8 to obtain a Raney copper catalyst;
[0067] (2) Preparation of silver solution: weigh 1.2g of silver nitrate (molar weight: 7.1mmol), add 10mL of deionized water and stir until dissolved, measure 2.3mL of ethylenediamine solution (ethylenediamine density: 0.9g / mL) Add dropwise to 10mL deionized water to form a uniform solution. The molar ratio of ethylenediamine to silver is 5:1. Add the aqueous solution of ethylenediamine to the silver nitrate solution dropwise to form a transparent and uniform solution. The solution is fixed in a 200mL volumetric flask to form a 3.0mgAg / mL solution. Silve...
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