Catalyst carrier, method for production thereof, and use thereof
A technology of catalyst carrier and sphere, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., which can solve the problems of expensive, no acetic acid stability, etc.
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Embodiment 1
[0089] Prepare catalyst carrier of the present invention
[0090] 700 g of a spherical KA carrier with a diameter of about 5 mm, which is usually obtained from Süd-Chemie in the art, was transferred to a round bottom flask, the parameters of the spherical KA carrier are shown in Table 1, and 25% hydrochloric acid was used at a temperature greater than 50 ° C. A total of 30 hours of treatment at temperature. The obtained treated support was washed with water and then dried. The dried support was calcined at a temperature ranging from 450° C. to 670° C. for 5 hours, wherein a catalyst support according to the invention having the parameters given in Table 1 was obtained.
[0091] Table 1
[0092]
[0093] * The bulk density (compacted density) listed in the table is measured in a 1-liter measuring cylinder with an inner diameter of 6 cm, and the repeatability is about ±1 g / L.
Embodiment 2
[0095] Makes 2.867g of Na 2 PdCl 4 solution (Pd content 19.64%) with 0.505g of HAuCl 4 solution (Au content 41.81%) and 40.41g of H 2 O forms a homogeneous solution in the mixer. After adding 65 g of the catalyst supports of the inventive example 1, they were allowed to rotate in the round-bottomed flask at room temperature for 65 minutes, with the result that they reached a dry state. After impregnation, 81.93 g of a 0.38 M base mixture consisting of a 50:50 NaOH:KOH mixture (thus 40.965 g of 0.38 M NaOH + 40.965 g of 0.38 M KOH) were added to the carrier spheres at room temperature Leave everything overnight for 16.5h. After evacuating the fixative solution (base solution), use 73.14 g of 10% NaH 2 PO 2 The solution reduces the catalyst precursor thus prepared for 2h. After evacuation of the reducing solution, the support spheres were washed with desalted water for 19 h at room temperature with constant water exchange to remove Cl residues. The final value of the con...
Embodiment 3
[0099] Embodiment 3 (comparative example):
[0100] 2.867gNa 2 PdCl 4 solution (Pd content 19.64%) with 0.505gHAuCl 4 solution (Au content 41.81%) and 35.997gH 2 O forms a homogeneous solution in the mixer. After adding 65 g of the KA support according to the invention of Example 1, which is common in the art, they were rotated in a round bottom flask at room temperature for 65 minutes, as a result of which they reached a dry state. After impregnation, 81.93 g of a 0.38M base mixture consisting of a 50:50 NaOH:KOH mixture (thus 40.965 g of 0.38 M NaOH + 40.965 g of 0.38 M KOH) was added to the carrier spheres at room temperature Leave everything overnight for 16.5h. After evacuating the fixative solution (base solution), use 73.14 g of 10% NaH 2 PO 2 The solution reduced the catalyst precursor for 2 h. After evacuation of the reducing solution, the support spheres were washed with desalted water for 19 h at room temperature with constant water exchange to remove Cl r...
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