Supported trimetallic catalyst and preparation method thereof, and method for catalyzing hydrogenolysis reaction of glycerol
A catalyst and three-metal technology, applied in the field of supported three-metal component catalysts and their preparation, to achieve high catalytic activity and selectivity for glycerol hydrogenolysis
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[0029] According to another aspect of the present invention, the present invention also provides a preparation method of supported trimetallic catalyst, the method comprising the steps of:
[0030] (1) impregnating the support with a solution containing the first metal component compound, or a mixed solution containing the first metal component compound and a platinum-containing compound, and then performing the first reduction activation;
[0031](2) impregnating the reductively activated product obtained in step (1) with a solution containing a platinum compound in a reducing or inert atmosphere, and then performing a second reductive activation to obtain a catalyst precursor;
[0032] (3) impregnating the catalyst precursor obtained in step (2) with a solution containing the second metal component compound in a reducing or inert atmosphere, and then drying and optionally calcining to obtain the supported trimetallic catalyst.
[0033] The platinum-containing compound is at ...
Embodiment 1
[0057] This embodiment is used to illustrate the catalyst provided by the present invention and its preparation method.
[0058] 1) According to the required metal salt content of equal volume impregnation method, be prepared with the impregnation solution of 30.6 milliliters of nickel nitrate containing 219 grams per liter of nickel. Decant the impregnation solution to 36 g γ-Al 2 o 3 The carrier (product of Changling Catalyst Factory, particle size 20-40 mesh, the same below) was stirred evenly at 20°C, left to stand for 4 hours, and then dried at 120°C.
[0059] 2) Roasting at 400°C for 4 hours, hydrogen reduction at 400°C for 4 hours, and hydrogen pressure at 0.1 MPa.
[0060] 3) After reduction, it was lowered to room temperature, and 55.1 ml of platinum dichlorotetraammine platinum aqueous solution containing 8.12 g / L of platinum was added under a hydrogen atmosphere, allowed to stand for 2 hours, and then dried with hydrogen. After drying, the temperature was raised ...
Embodiment 2
[0076] This example is used to illustrate the catalyst provided by the present invention and its preparation method.
[0077] 1) According to the required metal salt content of equal volume impregnation method, be prepared with the impregnation solution of 30.6 milliliters of nickel nitrate containing 219 grams per liter of nickel. Decant the impregnation solution to 36 g SiO 2 Carrier (Qingdao Ocean Chemical Factory), stirred at 15°C, allowed to stand for 6 hours, and then dried at 100°C.
[0078] 2) Roasting at 450°C for 2 hours, hydrogen reduction at 450°C for 2 hours, and hydrogen pressure at 1 MPa.
[0079] 3) After reduction, it was lowered to room temperature, and 55.1 ml of platinum dichlorotetraammine platinum aqueous solution containing 8.12 g / L of platinum was added under a hydrogen atmosphere, allowed to stand for 2 hours, and then dried with hydrogen. After drying, the temperature was raised to 450° C. and reduced for 4 hours under a hydrogen atmosphere, and the...
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