Method for preparing ketone compounds by transferring ABE fermentation solution
A technology for ketone compounds and fermentation broth, applied in the field of preparing high carbon ketones, can solve the problems of uncontrollable degree of condensation, catalyst poisoning and the like, and achieve the effects of good stability and simple preparation
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Embodiment 1
[0009] Catalyst preparation
[0010] Weigh 25g of cerium nitrate hexahydrate and dissolve it in 2.5L of water, add ammonia water to adjust the pH=11, stir for 4h, filter, dry, and calcinate at 500°C for 4h to obtain 10g of cerium oxide.
[0011] Preparation of high-carbon ketones
[0012] The 14-25 mesh catalyst is taken by the forming sieve and filled into the reaction tube, and the bed is filled with 6 cm. In the raw material ABE, acetone:butanol=1:10 (mass ratio), acetone:ethanol=5:1 (mass ratio), and the water content in the fermentation broth is 25% (volume ratio). The mass space velocity of ABE fermentation broth is 0.1h -1 . The reaction was carried out at 420° C., sampling and chromatographic analysis were performed every 2 hours. The conversion rate of the total carbon number in the raw materials was 75%, the selectivity of 4-heptanone was 75%, and the selectivity of 2-pentanone was 20%.
Embodiment 2
[0014] Catalyst preparation
[0015] Weigh 25g of cerium nitrate hexahydrate and dissolve it in 2.5L of water, add a mass concentration of -27% ammonia water to adjust pH=11, stir for 4h, filter, dry, and calcinate at 500°C for 4h to obtain 10g of cerium oxide.
[0016] Preparation of high-carbon ketones
[0017] The 14-25 mesh catalyst is taken by the forming sieve and filled into the reaction tube, and the bed is filled with 6 cm. In the raw material ABE, acetone:butanol=1:10 (mass ratio), acetone:ethanol=5:1 (mass ratio), and the water content in the fermentation broth is 25% (volume ratio). The mass space velocity of ABE fermentation broth is 0.5h -1 . The reaction was carried out at 420° C., sampling and chromatographic analysis were performed every 2 hours. The conversion rate of the total carbon number in the raw materials was 60%, the selectivity of 4-heptanone was 70%, and the selectivity of 2-pentanone was 20%.
Embodiment 3
[0019] Catalyst preparation
[0020] Weigh 25g of cerium nitrate hexahydrate and dissolve it in 2.5L of water, add a mass concentration of -27% ammonia water to adjust the pH=11, stir for 4h, filter, dry, and calcinate at 500°C for 4h to obtain 10g of cerium oxide.
[0021] Preparation of high-carbon ketones
[0022] The 14-25 mesh catalyst is taken by the forming sieve and filled into the reaction tube, and the bed is filled with 6 cm. In the raw material ABE, acetone:butanol=1:10 (mass ratio), acetone:ethanol=5:1 (mass ratio), and the water content in the fermentation broth is 25% (volume ratio). The mass space velocity of ABE fermentation broth is 0.8h -1 . The reaction was carried out at 420° C. and sampling and chromatographic analysis were performed every 2 hours. The conversion rate of total carbon in the raw materials was 53%, the selectivity of 4-heptanone was 72%, and the selectivity of 2-pentanone was 20%.
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