A kind of method for producing vinyl ether
A technology of vinyl ether and acetaldehyde, which is applied in chemical instruments and methods, organic chemistry, and the preparation of organic compounds, and can solve problems such as environmental pollution, low product yield, and high safety risks
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Embodiment 1
[0039] (1) Preparation of solid super acid catalyst: use 20g LaCl 3 Dissolve in 200g of hot 30% sulfuric acid solution, add 200g of nano-zirconia to the obtained solution for impregnation, then add 20g of succulent powder, stir to room temperature, filter, dry the solid, and bake at 400°C for 6h in an air atmosphere after molding The supported modified solid superacid catalyst was prepared, and the elemental analysis was Zr / La=20.
[0040] (2) Preparation of high-efficiency acetal cracking catalyst: at 90 °C, 46 g CeO 2 Dissolve in 882g of 12% phosphoric acid aqueous solution, add about 100g of calcium hydroxide powder to the obtained solution in batches, until pH 9-10, continue to stir for 5h, cool down to room temperature to obtain the precipitate, filter, wash and dry at 120°C for 12h , calcined at 500°C for 3h, pressed into tablets, and sieved to obtain 20-40 mesh catalyst for use. Elemental analysis Ca / Ce=5.
[0041](3) A fixed-bed reactor with a diameter of 50 mm is fi...
Embodiment 2
[0048] (1) Preparation of solid superacid catalyst: use 44g CeCl 3 Dissolve in 800g of hot 15% sulfuric acid solution, add 200g of nano-zirconia to the obtained solution for impregnation, then add 20g of polyacrylamide, stir to room temperature, filter, dry the solid, and bake at 500°C for 4h in an air atmosphere after molding The supported modified solid superacid catalyst was prepared, and the elemental analysis was Zr / Ce=10.
[0049] (2) Preparation of high-efficiency acetal cracking catalyst: at 90 °C, 9.3 g La 2 O 3 Dissolve in 1680g of 5% sulfuric acid aqueous solution, add about 50g of magnesium hydroxide powder to the obtained solution in batches, until the pH is 7-8, continue to stir for 5h, cool down to room temperature to obtain the precipitate, filter, wash and dry at 120 ° C for 12h , calcined at 500°C for 3h, pressed into tablets, and sieved to obtain a 20-40 mesh catalyst for use. Mg / La=15 by ICP analysis.
[0050] (3) A fixed-bed reactor with a diameter of 5...
Embodiment 3
[0057] (1) Preparation of solid super acid catalyst: use 48g YCl 3 Dissolve in 2360g of hot 5% hydrochloric acid solution, add 33g of nano-titanium oxide to the obtained solution for impregnation, then add 0.5g of methylcellulose, stir to room temperature, filter, dry the solid, and press into the air at 300°C After calcination for 10h, the supported modified solid superacid catalyst was prepared, and the elemental analysis was Ti / Y=5.
[0058] (2) Preparation of high-efficiency acetal cracking catalyst: at 90 °C, 3 g of Y 2 O 3 Dissolve in 328g of 30% hydrochloric acid aqueous solution, add about 100g of calcium hydroxide powder to the obtained solution in batches, until pH 7-8, continue to stir for 5h, cool down to room temperature to obtain the precipitate, filter, wash and dry at 120°C for 12h , calcined at 450°C for 3h, pressed into tablets, and sieved to obtain a 20-40 mesh catalyst for use. ICP analysis Ca / Y=50.
[0059] (3) A fixed-bed reactor with a diameter of 50 ...
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