A hydrogenation protecting agent and its preparation method and application
A technology of hydrogenation protective agent and protective agent, which is applied in chemical instruments and methods, physical/chemical process catalysts, refining to remove heteroatoms, etc. It can solve the problems of low demetallization and easy deposition of metals, and achieve high activity stability , not easy to deposit carbon, prolong the effect of operating cycle
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preparation example Construction
[0023]According to the present invention, in the preparation method of the modified hydrogenation catalyst carrier, the type of the carrier can be a conventional choice in the art, for example, it can be alumina, or it can be alumina and silica, titania and A mixture of at least one of zirconia. Wherein, the alumina may be, for example, at least one of γ-alumina, η-alumina, θ-alumina, δ-alumina and χ-alumina. The above-mentioned carriers can be obtained commercially, or can be prepared according to various methods known to those skilled in the art. For example, the alumina support can be prepared by calcining the alumina precursor to convert it into at least one of γ-alumina, η-alumina, θ-alumina, δ-alumina and χ-alumina . If necessary, before and / or after calcination, the alumina precursor can be shaped to prepare a shape suitable for actual operation (such as spherical shape, flake shape, bar shape, etc.). The forming can be carried out according to conventional methods i...
preparation example 1
[0056] 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 ), 30 grams of Tianjing powder (product of Henan Lankao Tianjing Rubber Factory) and 30g of hydroxymethyl cellulose and mix evenly, then add 1200 milliliters of aqueous solution containing 28g of nitric acid, and extrude on a plunger type extruder into an outer diameter of 2.5 mm, a Raschig ring bar with an inner diameter of 1mm. Then the wet Raschig ring 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 0.81mL / g, and the specific surface area is 132m 2 / g.
Embodiment 1
[0058] This example is used to illustrate the hydrogenation protecting agent of the present invention and its preparation method.
[0059] (1) Take 200 grams of the carrier Z prepared by Preparation Example 1, first hydrothermally treat the carrier at 70° C. for 24 hours, and then use 165 ml of carrier Z with a temperature of 50° C. containing 15 g / L H 3 BO 3 The aqueous solution (pH value is 6) is saturated and impregnated for 1 hour, and then dried at 100 ° C for 3 hours to obtain a carrier loaded with component B;
[0060] (2) Put the carrier loaded with component B obtained in step (1) in 140 milliliters of 50°C containing 15 g / L NH 4 F was immersed in an aqueous solution (pH value of 11) 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 S1.
[0061] (3) Get 200 grams of carrier S1, use 210 milliliters of molybdenum oxide and basic cobalt carbonate mixed solution (wherein, with Mo...
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