Selective nickel based hydrogenation catalyst and the preparation thereof
a nickel-based hydrogenation catalyst and selective technology, applied in the field of selective nickel-based hydrogenation catalysts, can solve the problems of inability to meet the hydrogenation load, poor hydrogenation stability of the catalyst, and inferior performance of the palladium-based catalyst for the first-stage hydrogenation, etc., and achieve good hydrogenation stability and good hydrogenation performance.
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example 1
[0039]140 ml water, 5 ml nitric acid (the content of which is 60%) and 16 ml silica sol (comprising 40% silica) are added to 300 g pseudo-boehmite alumina powder. After kneading and extruding, the formed alumina carrier is dried in air at 120° C., and then calcinated at 560° C. for 4 hours. 100 g calcinated carrier is impregnated with a solution form by dissolving 26 g magnesium nitrate into water, dried in air at 120° C., and calcinated at 1050° C. for 4 hours, thereby obtaining the modified Al2O3 carrier.
[0040]10 g nickel nitrate is added to 20 ml water with stirring. While stirring, 2.1 g cerium nitrate and 0.3 g ammonium molybdate are added. The pH of the solution is adjusted to 4. Then 10 g carrier is impregnated with the solution, aged for 12 hours, dried at 120° C., and calcinated at 400° C. for 4 hours, thereby obtaining the catalyst.
example 2
[0043]140 ml water, 5 ml nitric acid (the content of which is 60%) and 14 ml silica sol (comprising 40% silica) are added to 300 g pseudo-boehmite alumina powder. After kneading and extruding, the formed alumina carrier is dried in air at 120° C., and then calcinated at 460° C. for 4 hours. 100 g calcinated carrier is impregnated with a solution formed by dissolving 20 g magnesium nitrate and 3.5 g strontium nitrate into water, dried in air at 120° C., and calcinated at 1000° C. for 4 hours, thereby obtaining the Al2O3 carrier.
[0044]8.6 g nickel nitrate is added to 20 ml water with stirring. While stirring, 1.5 g lanthanum nitrate and 0.6 g ammonium tungstate are added. The pH of the solution is adjusted to 4. Then 10 g carrier is impregnated with the solution, aged for 12 hours, dried at 120° C., and calcinated at 350° C. for 4 hours, thereby obtaining the catalyst.
example 3
[0047]140 ml water, 5 ml nitric acid (the content of which is 60%) and 9 ml silica sol (comprising 40% silica) are added to 300 g pseudo-boehmite alumina powder. After kneading and extruding, the formed alumina carrier is dried in air at 120° C., and then calcinated at 460° C. for 4 hours. 100 g calcinated carrier is impregnated with a solution formed by dissolving 15.5 g magnesium nitrate into water, dried in air at 120° C., and calcinated at 1030° C. for 4 hours, thereby obtaining the Al2O3 carrier.
[0048]7.9 g nickel nitrate is added to 20 ml water with stirring. While stirring, 0.63 g cerium nitrate, 0.62 g lanthanum nitrate and 0.5 g ammonium tungstate are added. The pH of the solution is adjusted to 4. Then 10 g carrier is impregnated with the solution, aged for 12 hours, dried at 120° C., and calcinated at 400° C. for 4 hours, thereby obtaining the catalyst.
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Abstract
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