Preparation method for composite oxide carrier
A composite oxide and oxide technology, applied in catalyst carriers, chemical instruments and methods, chemical/physical processes, etc., can solve problems affecting the physical properties and surface properties of carriers, rapid precipitation of zirconia or titania, and different particle sizes. problem, to achieve the effect of easy vulcanization, easy reduction, and simple production process
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Embodiment 1
[0034] Mix 1000ml 2mol / L aluminum nitrate with 22ml silica gel (containing SiO 2 25wt%), mixed with ammonia water, adjusted to a pH value of 8.5, and reacted at 60° C., and the resulting precipitate was washed and filtered to obtain a wet filter cake. 10g / 100ml of Zr(NO 3 ) 4 The solution is mixed with a theoretical amount of ammonium tartrate to obtain a complex solution. The wet filter cake was added into the complex solution and stirred vigorously, heated to 40°C for aging for 2 hours, suction filtered, and the filter cake was dried at 120°C for 3 hours and pulverized to obtain a composite oxide dry glue. The composite oxide dry glue was calcined at 600°C for 3 hours to obtain a composite oxide, in which the content of zirconia was 10 wt%, and the content of silicon oxide was 5 wt%. The main properties are listed in Table 1.
[0035] Take 131g of composite oxide dry glue, 13.9g of SB powder, add 3g of scallop powder, 5ml of dilute nitric acid, knead, extrude, dry at 120°...
Embodiment 2
[0037] Mix 1 mol / L aluminum sulfate and 1 mol / L sodium metaaluminate in parallel, adjust the pH value to 7.0, and react at 50°C. The resulting precipitate is washed and filtered to obtain a wet filter cake. 20g / 100ml of Zr(NO 3 ) 4 The solution is mixed with a theoretical amount of ammonium tartrate to obtain a complex solution. The rest are the same as in Example 1 to obtain the composite oxide dry glue. The composite oxide dry glue was calcined at 600°C for 3 hours to obtain a composite oxide, in which the content of zirconia was 50 wt%, and its main properties are listed in Table 1.
[0038] Take 118g of composite oxide dry glue, 27.8g of SB powder, add 3g of scallop powder, 3ml of dilute nitric acid and 2ml of acetic acid, knead, extrude, dry at 120°C for 3 hours, and roast at 600°C for 3 hours to obtain a composite oxide carrier . Its main properties are listed in Table 2.
Embodiment 3
[0040] Mix 1000ml 2mol / L aluminum nitrate with 22ml silica gel (containing SiO 2 25 wt%), mixed with ammonia water, adjusted to a pH of 7.5, reacted at 60° C. and aged for 3 hours, and the resulting precipitate was washed and filtered to obtain a wet filter cake. 10g / 100ml of TiCl 4 The solution is mixed with a theoretical amount of EDTA to obtain a complex solution. The wet filter cake was added into the complex solution and stirred vigorously, filtered with suction, and the filter cake was dried at 120° C. for 3 hours and pulverized to obtain the composite oxide dry glue. The composite oxide gel was calcined at 600° C. for 3 hours to obtain a composite oxide, wherein the content of titanium oxide was 10 wt %, and the content of silicon oxide was 5 wt %. The main properties are listed in Table 1.
[0041] Take 141g of composite oxide dry glue, 13.9g of SB powder, add 3g of scallop powder, 5ml of dilute nitric acid, knead, extrude, dry at 120°C for 3 hours, and bake at 600°C...
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