Acetic ether hydrogenation catalyst and technological method
A hydrogenation catalyst, ethyl acetate technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of low ethyl acetate conversion rate and ethanol selectivity and other problems to achieve the effect of reducing energy consumption
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[0021] Example 1
[0022] The ethyl acetate raw material (in terms of mass percentage, water content 1%) is preheated and mixed with hydrogen, and then enters the tubular fixed-bed hydrogenation reactor. Preparation of CuO-ZnO-CaO-ZrO by co-precipitation method 2 Hydrogenation catalyst, in which CuO content is 65wt%, ZnO content is 17wt%, CaO content is 10wt%, ZrO 2 The content is 8wt%. The preparation steps include: preparing a metal salt solution I, which contains metal ions of copper, zinc, calcium, and zirconium ions; preparing a precipitating agent solution, denoted as solution II; adding solution I dropwise to the solution under heating and stirring conditions In II, the precipitation reaction is carried out at 80°C, the end point of the reaction is pH=7.0, aging for 4 hours to obtain the catalyst precursor slurry; the catalyst precursor slurry is washed and filtered to remove free ions, and dried at 100°C for 8 hours ; The dried catalyst precursor slurry was calcined at 4...
Example Embodiment
[0024] Example 2
[0025] The ethyl acetate raw material (by mass percentage, water content 3%) is preheated and mixed with hydrogen, and then enters the tubular fixed-bed hydrogenation reactor. Preparation of CuO-ZnO-CaO-La by co-precipitation method 2 O 3 Hydrogenation catalyst, in which CuO content is 60wt%, ZnO content is 25wt%, CaO content is 10wt%, La 2 O 3 The content is 5wt%. The preparation steps include: preparing a metal salt solution I, which contains metal ions such as copper ions, zinc ions, calcium ions, and lanthanum ions; preparing a precipitant solution, denoted as solution II; adding solution I dropwise to the solution under heating and stirring conditions In II, the precipitation reaction is carried out at 50°C, the end point of the reaction 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 ; The dried catalyst precursor slurry...
Example Embodiment
[0027] Example 3
[0028] The ethyl acetate raw material (in terms of mass percentage, water content 5%) is preheated and mixed with hydrogen, and then enters the adiabatic fixed-bed hydrogenation reactor. Preparation of CuO-ZnO-CaO-CeO by co-precipitation method 2 Hydrogenation industrial catalyst, in which CuO content is 62wt%, ZnO content is 8wt%, CaO content is 8wt%, CeO 2 The content is 22wt%. The preparation steps include: preparing a metal salt solution I, which contains metal ions of copper, zinc, calcium, and cerium ions; preparing a precipitant solution, which is referred to as solution II; adding solution II to the solution dropwise under heating and stirring conditions In I, the precipitation reaction is carried out at 40℃, the end of the reaction is pH=6.5, aging for 2 hours to obtain the catalyst precursor slurry; the catalyst precursor slurry is washed and filtered to remove free ions, and dried at 80℃ for 20 hours ; The dried catalyst precursor slurry was calcine...
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