Catalyst for synthesizing morpholine from diethylene glycol and preparation method thereof
A catalyst and a technology for diethylene glycol are applied in the field of catalysts for synthesizing morpholine from diethylene glycol and the field of preparation thereof, which can solve the problems of low selectivity of morpholine, and achieve high catalytic activity, low preparation cost and good hydrothermal stability. Effect
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Embodiment 1
[0025] The preparation method of diethylene glycol synthesis morpholine catalyst:
[0026] (1) Carrier preparation: put weighed 0.1g of boron, 1.0g of SBA-15, 15mL of absolute ethanol and 5.0g of isopropyl titanate into a 50mL beaker and mix well to form a suspension I, and then continue to the suspension Add 5 mL of absolute ethanol and 2 mL of deionized water to liquid I to obtain a mixed solution, then adjust the pH value of the mixed solution to 3 with 10% dilute nitric acid aqueous solution with a pH value of 3, and continue stirring until it forms a stable and transparent gel II. The gel II was aged at room temperature for 24 h, dried at 85 °C for 4 h, and finally calcined at 550 °C for 2 h to obtain white powder TiO 2 / SBA-15;
[0027] Weigh 26g of aluminum nitrate nonahydrate, 50mL of ethanol and 5mL of deionized water to prepare mixed solution III, and white powder TiO 2 / SBA-15 soaked in the above mixed solution III for 8 hours, after filtering, put the filter cake...
Embodiment 2
[0035] The preparation method of diethylene glycol synthesis morpholine catalyst:
[0036] (1) Carrier preparation: put weighed 0.1g of boron, 1.0g of SBA-15, 15mL of absolute ethanol and 5.0g of isopropyl titanate into a 50mL beaker and mix well to form a suspension I, and then continue to the suspension Add 5 mL of absolute ethanol and 2 mL of deionized water to liquid I to obtain a mixed solution, then adjust the pH value of the mixed solution to 3 with 10% dilute nitric acid aqueous solution with a pH value of 3, and continue stirring until it forms a stable and transparent gel II. The gel II was aged at room temperature for 12 h, dried at 85 °C for 4 h, and finally calcined at 550 °C for 2 h to obtain white powder TiO 2 / SBA-15;
[0037] Weigh 26g of aluminum nitrate nonahydrate, 50mL of ethanol and 5mL of deionized water to prepare mixed solution III, and white powder TiO 2 / SBA-15 soaked in the above mixed solution III for 1 hour, dried in an oven at 40°C to remove wa...
Embodiment 3
[0045] The preparation method of diethylene glycol synthesis morpholine catalyst:
[0046] (1) Carrier preparation: put weighed 0.1g of boron, 1.0g of SBA-15, 15mL of absolute ethanol and 5.0g of isopropyl titanate into a 50mL beaker and mix well to form a suspension I, and then continue to the suspension Add 5mL of absolute ethanol and 2mL of deionized water to liquid I to obtain a mixed solution, then adjust the pH value of the mixed solution to 4 with 10% dilute nitric acid aqueous solution with a pH value of 3, and continue stirring until it forms a stable and transparent gel II. The gel II was aged at room temperature for 48 h, dried at 85 °C for 4 h, and finally calcined at 550 °C for 2 h to obtain white powder TiO 2 / SBA-15;
[0047] Weigh 26g of aluminum nitrate nonahydrate, 50mL of ethanol and 5mL of deionized water to prepare mixed solution III, and white powder TiO 2 / SBA-15 soaked in the above mixed solution III for 1 hour, dried in an oven at 40°C to remove wate...
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