Complex metal oxide catalyst for synthesis of diphenyl carbonate by ester exchange reaction and preparation method thereof
A technology of diphenyl carbonate and composite metal, applied in metal/metal oxide/metal hydroxide catalyst, organic carbonate preparation, catalyst activation/preparation, etc., can solve unstable performance, difficulty in separation and recovery of catalyst, cost Expensive and other problems, to achieve the effect of good stability, good economic and social benefits, and no corrosion of equipment
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Embodiment 1
[0038] 1, take by weighing 20.0 grams of ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 ? h 2O) (containing about 11 grams of molybdenum) was dissolved in distilled water to make a 30% (mass percent) solution; then it was mixed with the prepared 20% (volume percent) acetic acid solution by a parallel flow method, and 50ml was added dropwise n-Butyl titanate (containing about 7.0 grams of titanium), stirred, precipitated, and vacuum filtered; the resulting precipitate or gel was dried in an oven at 90-120°C for 12 hours; the dried precipitate was placed in a muffle furnace Calcined at 400°C for 3 hours and taken out to obtain a molybdenum-titanium composite metal oxide catalyst.
[0039] 2. Weigh 110.0 grams of phenyl acetate (about 0.80 mol), 12.0 grams of dimethyl carbonate (about 0.13 mol) and 5.0 grams of the prepared molybdenum-titanium composite oxide catalyst and add them to a 250ml high-pressure reactor with an intelligent constant temperature controller , sealed with fa...
Embodiment 2
[0042] 1. Weigh sodium molybdate (Na 2 MoO 4 ? h 2 (0) 20.0 grams (containing about 7.9 grams of molybdenum) are dissolved in distilled water to be made into a 40% (mass percent) solution; then it is mixed with the prepared 20% (volume percent) nitric acid solution in parallel flow, and simultaneously, Add 45ml of isopropyl titanate (containing about 6.8 grams of titanium) dropwise, stir, precipitate, and vacuum filter; dry the resulting precipitate or gel in an oven at 90-120°C for 12 hours; dry the dried precipitate in a horse Calcined in a Furnace at 500°C for 5 hours and taken out to obtain a molybdenum-titanium composite metal oxide catalyst.
[0043] 2. Weigh 80.0 grams of phenyl acetate (about 0.60 mol), 25.0 grams of dimethyl carbonate (about 0.28 mol) and 3.0 grams of the prepared molybdenum-titanium composite oxide catalyst and add them to a 250ml high-pressure reactor with an intelligent constant temperature controller , sealed with fasteners, and then confirmed...
Embodiment 3
[0046] 1. Weigh ammonium dimolybdate ((NH 4 ) 2 Mo 2 o 7 ) 20.0 grams (containing about 11.0 grams of molybdenum), dissolved in distilled water, and made into a 50% (mass percent) solution; Titanium (TiOSO 4 ? h 2 O) The solution (containing about 1.1 grams of titanium) is mixed, stirred, precipitated, and vacuum filtered by a parallel flow method; the resulting precipitate is dried in an oven at 90-120° C. for 12 hours; the dried precipitate or gel is Baking in a muffle furnace at a temperature of 500° C. for 3 hours, taking out the molybdenum-titanium composite metal oxide catalyst.
[0047] 2. Weigh 110.0 grams of phenyl acetate (about 0.80 mol), 36.0 grams of dimethyl carbonate (about 0.40 mol) and 8.0 grams of the prepared molybdenum-titanium composite oxide catalyst and add them to a 250ml high-pressure reactor with an intelligent constant temperature controller , sealed with fasteners, and then confirmed the airtightness of the high-pressure airtight reaction ket...
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