Method for preparing decanal
A technology of decanal and decenal, which is applied to the preparation of carbon-based compounds, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of high price and high energy consumption
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preparation example 1
[0043] This preparation example provides a composite catalyst.
[0044] (1) Weigh 3g (0.03mol) of polyvinyl imidazole (PVIM) and dissolve it in 200ml of methanol, and add 50ml of peroxymolybdic acid (self-made, commercially available molybdenum powder is dissolved in 30% hydrogen peroxide) dropwise under stirring conditions. A solution of methanol at a concentration of 0.1 mmol / ml, a solid material immediately appeared in the solution. After the dropwise addition was completed, stirring was maintained for 4 h. Finally, after vacuum filtration and methanol washing for 3 times, it was dried at 80 °C for 8 h to obtain peroxymolybdic acid-polyvinylimidazole polymer, denoted as PMo-1.
[0045] (2) 2 g of PMo-1 obtained in Preparation Example 1 was weighed and dispersed in 20 ml of methanol, and 40 ml of palladium nitrate methanol solution with a palladium concentration of 0.5 mg / ml was added dropwise under stirring. After the dropwise addition was completed, stirring was maintain...
preparation example 2
[0049] This preparation example provides a composite catalyst.
[0050] (1) 2 g of PMo-1 obtained in Preparation Example 1 was weighed and dispersed in 20 ml of methanol, and 40 ml of palladium nitrate methanol solution with a palladium concentration of 0.05 mg / ml was added dropwise under stirring. After the dropwise addition was completed, stirring was maintained for 4 h. Finally, after vacuum filtration and methanol washing for 3 times, drying at 80°C for 8 h was obtained to obtain a palladium-peroxymolybdic acid-polyvinylimidazole composite catalyst with a Pd loading of 0.1%, number A1-2.
[0051] (2) The schematic structural formula of A1-2 is shown in formula I.
preparation example 3
[0053] This preparation example provides a composite catalyst.
[0054] (1) Weigh 3.76g (0.04mol) of polyvinylimidazole (PVIM) and dissolve it in 200ml of methanol, add 100ml of peroxymolybdic acid (self-made, commercially available molybdenum powder is dissolved in 30% hydrogen peroxide) dropwise with stirring ) at a concentration of 0.1 mmol / ml in methanol, a solid material immediately appeared in the solution. After the dropwise addition was completed, stirring was maintained for 4 h. Finally, after vacuum filtration and methanol washing for 3 times, it was dried at 80 °C for 8 h to obtain a peroxymolybdic acid-polyvinylimidazole polymer, which was denoted as PMo-2.
[0055] (2) 2 g of PMo-2 obtained in Preparation Example 3 was weighed and dispersed in 20 ml of methanol, and 40 ml of palladium nitrate methanol solution containing palladium concentration of 0.5 mg / ml was added dropwise under stirring. After the dropwise addition was completed, stirring was maintained for ...
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