Selective hydrogenation catalyst of alkine and diolefin, preparation method and application

[0026] Example 1

[0027] Will contain 5g Al 2 O 3 20% of Al 2 O 3 Colloidal solution with HNO 3 Adjust pH=3.5, weigh 100g of SiC ring carrier, immerse it in the prepared colloidal solution, dry at 120°C for 24h, then calcinate at 300°C for 8h and then cool to room temperature for later use. PdCl containing 0.02g Pd 2 Solution, AgNO containing 0.1g Ag 3 Solution containing 0.1g Bi Bi(NO 3 ) 2 Solution, Ca(NO 3 ) 2 The carrier to be used should be impregnated step by step. After each element is impregnated, it should be dried at 150°C for 24 hours, and finally calcined at 600°C for 8 hours to obtain catalyst A, in which Pd content is 0.03%, Ag content is 0.1%, and Bi content is 0.1 %, the Ca content is 0.01%.

[0028] Example 2

[0029] With 10g Al 2 O 3 Of 5% Al 2 O 3 Add HNO to the colloidal solution 3Adjust pH=2.5, weigh 100g of SiC ring carrier for impregnation, dry at 200°C for 8h, calcined at 300°C for 15h, and cool to room temperature for later use. The carrier to be used was first immersed in a nitrate solution containing 0.01g Ag, 0.05g Bi, 0.02g La, dried at 200°C for 8 hours, and then the carrier was immersed in a nitrate solution containing 0.05g Pd, 0.005g Ca, 0.005g Sr And 0.02g K chloride salt solution, dried at 200°C for 8h, 300°C for 15h to obtain catalyst B, in which the Pd content is 0.05%, the Ag content is 0.01%, the Bi content is 0.05%, and the Ca content is 0.005%. The K content is 0.02%, the Sr content is 0.005%, and the La content is 0.02%.

[0030] Example 3

[0031] With 6g Al 2 O 3 30% of Al 2 O 3 In colloidal solution, use HNO 3 Adjust pH=4.2, weigh 100g of talc powder ring carrier and immerse it in the prepared solution, dry at 100°C for 13.5h, then calcinate at 780°C for 20h and then cool to room temperature for later use. Pd(NO 3 ) 2 , AgNO containing 0.5g Ag 3 , Bi(NO 3 ) 2 , Cu(NO 3 ) 2 , NaNO containing 0.05g Na 3 A mixed solution was prepared, the carrier to be used was immersed in the mixed solution, dried at 135°C for 30h, and then calcined at 550°C for 20h to obtain catalyst C. The Pd content is 0.01%, the Ag content is 0.5%, the Bi content is 0.5%, the Cu content is 0.05%, and the Na content is 0.05%.