Solid catalyst for preparing diol by hydrating epoxy compound as well as preparation and application thereof
A solid catalyst and ligand technology, which can be used in the preparation of organic compounds, organic compounds/hydrides/coordination complex catalysts, preparation of hydroxyl compounds, etc., and can solve the problems of complicated preparation steps, high cost, poor stability of solid catalysts, etc. , to achieve the effect of good selectivity, easy separation and good tunability
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Embodiment 1
[0021] The preparation of the catalyst is as follows: Dissolve 3.3 g of cobalt nitrate in 30 ml of absolute ethanol, mix and stir for 30 min, add 20 ml of ethanol containing 9.85 g of 2-methylimidazole, mix and stir for 30 min, add dropwise 10 ml of ethanol solution containing 3.3 g of zinc nitrate, After mixing, stir for 30 minutes, add dropwise 1ml of formic acid solution, add 4mmol of salicylaldehyde, stir, add 3mmol of o-diphenylamine, reflux for 12h, cool, separate the solid, wash and dry to obtain catalyst A.
Embodiment 2
[0023] The preparation of the catalyst is as follows: Dissolve 3.3 g of cobalt nitrate in 30 ml of absolute ethanol, mix and stir for 30 min, add 20 ml of ethanol containing 9.85 g of 2-methylimidazole, mix and stir for 30 min, add dropwise 10 ml of ethanol solution containing 3.3 g of zinc nitrate, After mixing, stir for 30 minutes, add 1ml of formic acid solution dropwise, add 8mmol of salicylaldehyde, stir, add 5mmol of o-diphenylamine, reflux for 12h, cool, separate the solid, wash and dry to obtain catalyst B.
Embodiment 3
[0025] The preparation of the catalyst is as follows: Dissolve 3.3 g of cobalt nitrate in 30 ml of absolute ethanol, mix and stir for 30 min, add 20 ml of ethanol containing 9.85 g of 2-methylimidazole, mix and stir for 30 min, add dropwise 10 ml of ethanol solution containing 3.3 g of zinc nitrate, After mixing, stir for 30 minutes, add dropwise 1ml of formic acid solution, add 16mmol of salicylaldehyde, stir, add 9mmol of o-diphenylamine, reflux for 12h, cool, separate the solid, wash and dry to obtain catalyst C.
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