A kind of hydrogenation catalyst and its preparation method and application
A hydrogenation catalyst and catalyst technology, which are applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of less application in the field of hydrogenation catalysis, and are beneficial to deep hydrogenation, reducing agglomeration, increasing Active and selective effects
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[0023] The technical purpose of the first aspect of the present invention provides a kind of preparation method of hydrogenation catalyst, comprises the following steps:
[0024] The first step, preparation of composite oxide: dissolve copper salt and manganese salt in water, add TiO 2 , ultrasonication, stirring, and evaporating the mixture to dryness in a water bath, drying, and roasting to obtain a composite oxide; the molar ratio of each substance in Cu, Mn and Ti is 1:0.2~1:6~20;
[0025] The second step, graphene oxide-loaded composite oxide: ultrasonically disperse graphene oxide into the alcohol solution, stir, then add the composite oxide in the first step, transfer to a closed reaction kettle, and conduct hydrothermal treatment at 150~250°C. Cool, filter, wash and dry to obtain the catalyst.
[0026] In the above preparation method, as a preferred technical solution, the copper salt and manganese salt described in the first step are water-soluble salts that do not c...
Embodiment 1
[0046] Catalyst preparation:
[0047] (1) The first step, the preparation of composite oxide: 20.1g Cu(NO 3 ) 2 ·3H 2 O and 12.5g Mn(NO 3 ) 2 4H 2 O mixed, dissolved in 200mL water to form a solution, to which 80.0g TiO 2 , sonicated for 0.5h, stirred to obtain a homogeneous slurry, evaporated to dryness in a constant temperature water bath, then dried in an oven at 100°C, and finally placed in a muffle furnace at 350°C for 8h to obtain Cu, Mn and Ti composite oxide Y1.
[0048] (2) The second step, graphene oxide-loaded composite oxide: use natural graphite as raw material to prepare graphene oxide by Hummers' method, take 1.0g of graphene oxide and disperse it in 1L of absolute ethanol by ultrasonication for 0.5h, and then take 70g of graphene oxide The composite oxide prepared in one step was added to the above suspension, transferred to a polytetrafluoroethylene-sealed autoclave, placed in a 180°C oven for hydrothermal treatment for 8 hours, cooled, filtered and was...
Embodiment 2
[0049] Embodiment 2 (preparation of catalyst C2)
[0050] (1) The first step, the preparation of composite oxide: 24.2g Cu(NO 3 ) 2 ·3H 2 O and 7.53g Mn(NO 3 ) 2 4H 2 O mixed, dissolved in 200mL water to form a solution, to which 80.0g TiO 2 , sonicated for 0.5h, stirred to obtain a homogeneous slurry, evaporated to dryness in a constant temperature water bath, then dried in an oven at 100°C, and finally placed in a muffle furnace at 450°C for 6h to obtain Cu, Mn and Ti composite oxide Y2.
[0051] (2) The second step, graphene oxide-loaded composite oxide: use natural graphite as raw material to prepare graphene oxide by Hummers' method, take 2.1g of graphene oxide and disperse it in 1L of absolute ethanol by ultrasonication for 0.5h, and then take 70g of graphene oxide Add the composite oxide prepared in one step to the above suspension, transfer to a polytetrafluoroethylene sealed autoclave, place the autoclave in a 180°C oven for hydrothermal treatment for 8 hours, ...
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