Hydrogenation protective agent, and preparation method and application thereof
A technology of hydrogenation protective agent and protective agent, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., and can solve the problems of low demetallization and easy deposition of metals , to achieve the effect of not easy to deposit carbon, high activity and stability
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preparation example Construction
[0040] The present invention also provides a preparation method of the above-mentioned hydrogenation protecting agent, the method comprising:
[0041] (1) impregnating the hydrothermally treated carrier in an alkaline first solution containing a metal promoter compound providing the metal promoter, and then drying to obtain a carrier loaded with the metal promoter;
[0042] (2) The above-mentioned carrier loaded with the metal additive is impregnated in an acidic second solution containing an acidic additive compound providing the acidic additive, and then dried and calcined to obtain the modified hydrogenated Catalyst carrier;
[0043] (3) impregnating the modified hydrogenation catalyst carrier in a third solution containing the compound providing the active metal component, followed by drying and calcining.
[0044] According to the present invention, the above steps (1) and (2) prepare the modified hydrogenation catalyst carrier.
[0045] Wherein, in step (1), although a...
preparation example 1
[0073] Take by weighing 1000 grams of dry rubber powder produced by Changling Catalyst Factory (the dry basis is 71% by weight, wherein the content of pseudoboehmite is 68% by weight, the content of trihydrate alumina is 5% by weight, and the balance is amorphous alumina ) and 30 gram of turmeric powder (product of Henan Lankao tianjing rubber factory) and mix uniformly, then add 1200 milliliters of aqueous solution containing 28g of nitric acid, and extrude into a cylindrical bar with an outer diameter of 1.8mm on a plunger extruder. Then the cylindrical wet strip was dried at 120° C. for 4 hours, and then calcined at 960° C. for 3 hours to obtain carrier Z. Measured by the BET method, the pore volume of the carrier Z is 0.7mL / g, and the specific surface area is 100m 2 / g.
Embodiment 1
[0075] This example is used to illustrate the hydrogenation protecting agent of the present invention and its preparation method.
[0076] (1) Take 200 grams of the carrier Z prepared in Preparation Example 1, firstly treat the carrier at 135° C. for 12 hours with hydrothermal treatment, and then use 165 milliliters of carrier Z with a temperature of 40° C. containing 15 grams / liter of Mg(NO 3 ) 2 The aqueous solution (pH value is 11) is saturated and impregnated for 1 hour, and then dried at 200 ° C for 8 hours to obtain a carrier loaded with metal additives;
[0077] (2) The carrier obtained in step (1) is loaded with metal additives in 145 milliliters of 40 DEG C containing 10 g / L H 3 BO 3 The aqueous solution (pH value is 6) was immersed for 1 hour, then dried at 120°C for 3 hours, and then calcined at 400°C for 3 hours to obtain the modified hydrogenation catalyst carrier SZ1.
[0078] (3) Get 200 grams of carrier SZ1, use 210 milliliters of molybdenum oxide and basic ...
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