A kind of method of hydrogenation of acetic acid to produce ethanol
A technology for producing ethanol and acetic acid, which is applied in chemical instruments and methods, preparation of hydroxyl compounds, and preparation of organic compounds, etc., can solve the problems of high price and high production cost of ethanol, achieve good activity stability, long stable operation time of the device, The effect of small environmental impact
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Embodiment 1
[0044] Example 1: 1%WC / SiO 2 Catalyst preparation
[0045] Weigh 10g of porous silica gel carrier (its specific surface area is 480m 2 / g), from 0.13g (4.3974×10 -5 mol) of ammonium metatungstate and distilled water to prepare 12mL dipping solution, the tungsten concentration is 4.3974×10 -5 mol / mL, the volume of the impregnation solution is equal to the volume of the maximum adsorbed water of the catalyst carrier. Perform room temperature immersion according to an equal volume immersion method, drop 12 mL of immersion solution into 10 g of carrier, and stir continuously. After the dripping is completed, let it stand at room temperature for 3 hours, then dry at 90°C for 3 hours; program the temperature to 400°C at a rate of 1°C / min, and calcinate for 10 hours. Then, the dried catalyst precursor was put into a tubular reactor, and n-pentane was used as a carbon source, and hydrogen was introduced. The pressure was 0.1MPa and the mass space velocity of n-pentane was 0.2h. -1 , Unde...
Embodiment 2
[0046] Example 2: 5% WC / SiO 2 Catalyst preparation
[0047] Weigh 10g of the porous silica gel carrier, which is made up of 0.65g (2.1987×10 -4 mol) of ammonium metatungstate and distilled water to prepare 12mL dipping solution, the tungsten concentration is 2.1987×10 -4 mol / mL, the volume of the impregnation solution is equal to the volume of the maximum adsorbed water of the catalyst carrier. Perform room temperature immersion according to an equal volume immersion method, drop 12 mL of immersion solution into 10 g of carrier, and stir continuously. After the addition is complete, let it stand at room temperature for 24 hours, and dry at 60°C for 24 hours; program the temperature to 700°C at a rate of 2°C / min, and calcinate for 1 hour. Then, the dried catalyst precursor was put into a tubular reactor, and n-pentane was used as a carbon source, and hydrogen was introduced. The pressure was 0.5MPa and the mass space velocity of n-pentane was 0.5h. -1 , Under the condition of volu...
Embodiment 3
[0048] Example 3: 10%WC / SiO 2 Catalyst preparation
[0049] Weigh 10g of porous silica gel carrier, from 1.3g (4.3974×10 -4 mol) of ammonium metatungstate and distilled water to prepare 12mL dipping solution, the tungsten concentration is 4.3974×10 -4 mol / mL, the volume of the impregnation solution is equal to the volume of the maximum adsorbed water of the catalyst carrier. Perform room temperature immersion according to an equal volume immersion method, drop 12 mL of immersion solution into 10 g of carrier, and stir continuously. After the dripping is completed, let it stand at room temperature for 6 hours, and dry at 80°C for 12 hours; program the temperature to 650°C at a rate of 5°C / min, and calcinate for 4 hours. Then, the dried catalyst precursor was put into the tubular reactor, using n-pentane as a carbon source, and passing hydrogen gas at a pressure of 5.0 MPa and a mass space velocity of n-pentane of 2.0 h -1 , Under the condition of the volume ratio of hydrogen to n-...
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