A kind of carbon-containing supported bimetallic catalyst and its preparation method and glycerin hydrogenolysis reaction method
A bimetallic catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, to achieve high catalytic activity and selectivity for glycerol hydrogenolysis
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[0031] According to another aspect of the present invention, the present invention also provides a method for preparing a carbon-containing supported bimetallic catalyst, the preparation method comprising the following steps:
[0032] (1) using a first metal component M containing at least one noble metal selected from Group VIII 1 The solution of the compound impregnated the support, and then the impregnated support was sequentially dried, roasted or not roasted, and reduced to activate;
[0033] (2) Under a reducing or inert atmosphere, the product obtained in step (1) is impregnated with a solution containing a high-boiling organic matter and then heat-treated to obtain a carbon-containing catalyst precursor;
[0034] (3) impregnating the carbon-containing catalyst precursor obtained in step (2) with a solution containing a compound selected from VIB and / or a second metal component of Group VIIB in a reducing atmosphere, drying and optionally calcining, to obtain The carbo...
Embodiment 1
[0054] This example is used to illustrate the catalyst provided by the present invention and its preparation method.
[0055] 1) According to the metal salt content required by the equal-volume impregnation method, 30.6 milliliters of dichlorotetraammine platinum impregnation solution containing 23.5 grams per liter of platinum was prepared. Decant the impregnation solution to 36 g γ-Al 2 o 3 Carrier (product of Changling Catalyst Factory, particle size 20-40 mesh, the same below), stir well at 20°C, let stand for 4 hours, dry at 120°C, roast at 350°C for 4 hours, and reduce with hydrogen at 350°C for 4 hours , the hydrogen pressure is 0.1 MPa.
[0056] 2) 12.3 grams of sucrose was made into 55.1 ml of aqueous solution, and added to the solid in step 1) that had been lowered to room temperature under a nitrogen atmosphere. After standing for 2 hours, after drying at 120° C., heating at 500° C. for dehydration and carbonization, to obtain Catalyst precursors containing carbo...
Embodiment 2
[0069] This example is used to illustrate the catalyst provided by the present invention and its preparation method.
[0070] 1) according to the required metal salt content of equal volume impregnation method, be mixed with the impregnating solution of 30.6 milliliters containing platinum 23.5 grams per liter, rhodium 23.5 grams per liter of tetraammine platinum dichloride and rhodium chloride. Decant the impregnation solution to 36 g SiO 2 Carrier (Qingdao Ocean Chemical Factory), stirred at 15°C, allowed to stand for 6 hours, dried at 100°C, calcined at 450°C for 2 hours, reduced with hydrogen at 450°C for 2 hours, and the hydrogen pressure was 1 MPa.
[0071] 2) 13.0 grams of glucose was made into 55.1 milliliters of aqueous solution, and added to the solid in step 1) that had been lowered to room temperature under a nitrogen atmosphere, and after standing for 2 hours, after drying at 100°C, heating at 400°C for dehydration and carbonization to obtain Catalyst precursors ...
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