Method of liquid phase catalyzing oxihalogenated foluene to halogenated benzaldehyde
A technology of halogenated benzaldehyde and halogenated toluene, applied in the field of synthesis of aldehydes and ketones, can solve the problem of only 13.4%
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Embodiment 1
[0017] Weigh 0.1mol p-chlorotoluene, 0.001mol mesoporous Co / TiO 2 Add the catalyst and 4mol of acetic acid into a 250ml three-necked flask, heat the reaction temperature to 80°C, stir and slowly add 0.2mol of H 2 o 2 , After 10 hours of reaction, stop the reaction, filter and separate. The sample was analyzed by a gas spectrometer, and the results were: the conversion rate of p-chlorotoluene was 48.9%, the selectivity of p-chlorobenzaldehyde was 99.1%, and the selectivity of p-chlorobenzoic acid was 0.9%.
Embodiment 2
[0019] Weigh 0.1mol p-chlorotoluene, 0.001mol mesoporous Co / TiO 2 Add the catalyst and 4mol of acetic acid into a 250ml three-necked flask, heat the reaction temperature to 100°C, stir and slowly add 0.2mol of H 2 o 2 , After 10 hours of reaction, stop the reaction, filter and separate. The sample was analyzed by a gas spectrometer, and the results were: the conversion rate of p-chlorotoluene was 45.2%, the selectivity of p-chlorobenzaldehyde was 92.1%, and the selectivity of p-chlorobenzoic acid was 7.9%.
Embodiment 3
[0021] Weigh 0.1 mol of p-chlorotoluene and 0.001 mol of nano-Co / TiO in sequence 2 Add the catalyst and 4mol of acetic acid into a 250ml three-necked flask, heat the reaction temperature to 80°C, stir and slowly add 0.2mol of H 2 o 2 , After 10 hours of reaction, stop the reaction, filter and separate. The sample was analyzed by a gas spectrometer, and the results were: the conversion rate of p-chlorotoluene was 3.9%, the selectivity of p-chlorobenzaldehyde was 100%, and the selectivity of p-chlorobenzoic acid was 0.0%.
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