Ethyl acetate hydrogenation catalyst and process method
A hydrogenation catalyst, ethyl acetate technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low ethyl acetate conversion rate and ethanol selectivity and other problems, to achieve the effect of eliminating the refining process and reducing energy consumption
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Embodiment 1
[0022] Ethyl acetate raw material (by mass percentage, water content 1%) is preheated and mixed with hydrogen, and enters a tubular fixed-bed hydrogenation reactor. Preparation of CuO-ZnO-CaO-ZrO by coprecipitation method 2 Hydrogenation catalyst, wherein CuO content 65wt%, ZnO content 17wt%, CaO content 10wt%, ZrO 2 Content 8wt%. The preparation steps include: preparing metal salt solution I, which contains metal ions of copper ions, zinc ions, calcium ions, and zirconium ions; preparing a precipitant solution, which is recorded as solution II; adding solution I dropwise to the solution under heating and stirring In II, the precipitation reaction is carried out at 80°C, the reaction end point is pH=7.0, and the catalyst precursor slurry is obtained by aging for 4 hours; the catalyst precursor slurry is washed and filtered to remove free ions, and dried at 100°C for 8 hours ; Calcining the dried catalyst precursor slurry at 400° C. for 2 hours to prepare the catalyst.
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Embodiment 2
[0025] Ethyl acetate raw material (by mass percentage, containing 3% water) is preheated and mixed with hydrogen, and enters a tubular fixed-bed hydrogenation reactor. Preparation of CuO-ZnO-CaO-La by coprecipitation method 2 o 3 Hydrogenation catalyst, wherein CuO content 60wt%, ZnO content 25wt%, CaO content 10wt%, La 2 o 3 Content 5wt%. The preparation steps include: preparing metal salt solution I, which contains metal ions of copper ions, zinc ions, calcium ions, and lanthanum ions; preparing a precipitant solution, which is recorded as solution II; adding solution I dropwise to the solution under heating and stirring In II, the precipitation reaction is carried out at 50°C, the reaction end point is pH=6.0, and the catalyst precursor slurry is obtained by aging for 3 hours; the catalyst precursor slurry is washed and filtered to remove free ions, and dried at 120°C for 6 hours ; Calcining the dried catalyst precursor slurry at 700° C. for 1 hour to prepare the cataly...
Embodiment 3
[0028] The ethyl acetate raw material (by mass percentage, containing 5% water) is preheated and mixed with hydrogen, and enters an adiabatic fixed-bed hydrogenation reactor. Preparation of CuO-ZnO-CaO-CeO by coprecipitation method 2 Hydrogenation industrial catalyst, wherein CuO content 62wt%, ZnO content 8wt%, CaO content 8wt%, CeO 2Content 22wt%. The preparation steps include: preparing metal salt solution I, which contains metal ions of copper ions, zinc ions, calcium ions, and cerium ions; preparing a precipitant solution, which is recorded as solution II; adding solution II dropwise to the solution under heating and stirring In Ⅰ, the precipitation reaction is carried out at 40°C, the reaction end point is pH=6.5, and the catalyst precursor slurry is obtained by aging for 2 hours; the catalyst precursor slurry is washed and filtered to remove free ions, and dried at 80°C for 20 hours ; Calcining the dried catalyst precursor slurry at 600° C. for 3 hours to prepare the ...
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