Preparation method of 1-hydroxyl-2-alkanone
An alkanone and hydroxyl technology, which is applied in the field of preparation of 1-hydroxy-2-alkanone, can solve the problems of low selectivity, difficulty in preparation, and many by-products, and achieves high product selectivity and easy industrialization. The effect of large-scale production and simple process flow
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Embodiment 1
[0034] Catalyst Z1 was prepared by co-precipitation method, using copper nitrate, ytterbium nitrate and aluminum nitrate as raw materials, and a mixture of potassium hydroxide and potassium bicarbonate as precipitant.
[0035] According to elemental analysis, the weight content of CuO in catalyst Z1 is 46.1%, Yb 2 o 3 The weight content is 44.6%, K 2 The weight content of O is 0.8%, Al 2 o 3 The weight content is 8.5%.
[0036]Weigh 10 ml of catalyst Z2, place it in a fixed-bed reactor with an inner diameter of 10 mm, and first reduce it in a hydrogen atmosphere at 250 °C for 5 hours. After the reduction is completed, switch to 1,2-propanediol as the raw material, use hydrogen as the diluent, and the molar ratio of the diluent to the raw material is 1, at a temperature of 250°C, a pressure of 0.1 MPa and a liquid hourly space velocity of 5 h -1 Under the conditions, the conversion reaction was carried out, the conversion rate of raw materials was 41.8%, the product select...
Embodiment 2
[0038] Catalyst Z2 was prepared by co-precipitation method, using copper nitrate, nickel nitrate and aluminum nitrate as raw materials, and a mixture of potassium hydroxide and potassium bicarbonate as precipitant.
[0039] Through element analysis, the weight content of CuO of catalyst Z2 is 49.8%, the weight content of NiO is 35.2%, K 2 The weight content of O is 2.9%, Al 2 o 3 The weight content is 12.1%.
[0040] Weigh 10 ml of catalyst Z2, place it in a fixed-bed reactor with an inner diameter of 10 mm, and first reduce it in a hydrogen atmosphere at 250 °C for 5 hours. After the reduction is completed, switch to 1,2-propanediol as the raw material, use water vapor as the diluent, and the molar ratio of the diluent to the raw material is 0.1, at a temperature of 300°C, a pressure of 0.2 MPa and a liquid hourly space velocity of 2 h -1 Under the conditions, the conversion reaction was carried out, the conversion rate of raw materials was 45.4%, the product selectivity o...
Embodiment 3
[0042] Catalyst Z3 was prepared by co-precipitation method, using copper nitrate, zinc nitrate and aluminum nitrate as raw materials, and a mixture of potassium hydroxide and potassium bicarbonate as precipitant.
[0043] Through element analysis, the weight content of CuO of catalyst Z3 is 40.2%, the weight content of ZnO is 43.1%, K 2 The weight content of O is 2.5%, Al 2 o 3 The weight content is 14.2%.
[0044] Weigh 10 ml of catalyst Z3, place it in a fixed-bed reactor with an inner diameter of 10 mm, and first reduce it in a hydrogen atmosphere at 250 °C for 5 hours. After the reduction is completed, switch to 1,2-propanediol as the raw material, use nitrogen as the diluent, and the molar ratio of the diluent to the raw material is 0.5, at a temperature of 200°C, a pressure of 0.2 MPa and a liquid hourly space velocity of 1 h -1 Under the conditions, the conversion reaction is carried out, the conversion rate of raw materials is 49.3%, the product selectivity of 1-hyd...
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