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Preparation method of composite oxide adhesive

A technology of composite oxides and oxides, which is applied in the field of preparation of composite oxide dry glue, can solve the problems of affecting the physical and surface properties of the carrier, rapid precipitation of zirconia or titanium oxide, and different particle sizes, so as to achieve easy reduction, The effect of weakening the influence and simple production process

Active Publication Date: 2013-07-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the zirconium or titanium in the above method is added after the alumina is gelled, and the pH value of the alumina is in the alkaline range, while the zirconium-containing solution or the titanium-containing solution is acidic. When the two are mixed, it is easy to cause zirconia or titanium oxide Rapid precipitation, different particle sizes, re-peptization of the original alumina precipitation, wide particle size distribution of alumina, which in turn affects the physical and surface properties of the carrier

Method used

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  • Preparation method of composite oxide adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix 1000ml 2mol / L aluminum nitrate with 22ml silica gel (containing SiO 2 25 wt%), mixed with ammonia water, adjusted to pH 8.5, and reacted at 60°C to obtain Sol A. 10g / 100ml of Zr(NO 3 ) 4 The solution is mixed with the theoretical complexing amount of ammonium tartrate to obtain the complex solution B. Sol A and complex solution B are both mixed, and vigorously stirred, and 30wt% hydrogen peroxide is added at room temperature to make Zr 4+ :H 2 o 2 =1:3 (molar ratio), after reacting for 3 hours, heat up to 60°C and age for 1 hour, filter with suction, wash 3 times with deionized water, dry at 120°C for 3 hours and pulverize 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 10 wt%, and the content of silicon oxide was 5 wt%. The main properties are listed in Table 1.

[0029] Take 123g of composite oxide dry glue, 13.9g of SB powder, add 3g of s...

Embodiment 2

[0031]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 to obtain Sol A. 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.

[0032] Take 114g 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 .

Embodiment 3

[0034] Mix 1000ml 2mol / L aluminum nitrate with 22ml silica gel (containing SiO 2 25wt%) mixed, add ammonia, adjust the pH value to 7.5, react at 60°C to get sol A, and mix 20g / 100ml of TiCl 4 The solution is mixed with EDTA of theoretical complexing amount to obtain complex solution B. Mix sol A and complex solution B, and stir vigorously, add 100ml of 30wt% hydrogen peroxide at room temperature, heat up to 60°C for 1 hour after reacting for 3 hours, filter with suction, wash 3 times with deionized water, C and dried for 3 hours and pulverized to obtain dry composite oxide 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.

[0035] Take 132g 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 roast at...

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Abstract

The present invention discloses a preparation method of composite oxide adhesive. The method comprises the following steps: preparing aluminum hydroxide sol and aqueous solution containing IVB family metal complexes, mixing the aluminum hydroxide sol and the aqueous solution, dripping hydrolyzation accelerant to obtain mixed sediment, and carrying out aging, washing, filtering and drying treatments to obtain the composite oxide adhesive. According to the preparation method, most IVB family metal oxides are distributed on a surface of alumina, influence on an alumina pore structure is weakened, catalytic action of the IVB family metal oxides is raised, advantages of the alumina and the IVB family metal oxides are fully played, and the obtained composite oxide adhesive has the characteristics of large hole capacity, high specific surface area, controllable acidity, and is suitable for being a hydrogenation catalyst carrier.

Description

technical field [0001] The invention relates to a preparation method of a composite oxide dry glue, in particular to a preparation method of a composite oxide dry glue used for preparing a hydrofining catalyst carrier. Background technique [0002] The preparation process of the alumina support is simple, the specific surface area is high, the mechanical strength is good, and the pore size is suitable. It is one of the most widely used catalyst supports at present. Inactive species, such as nickel-aluminum spinel, are less likely to form highly reactive type II active phases. Therefore, the preparation and modification of alumina carriers and the preparation of aluminum-containing composite oxides have always been the research direction of scientists. At present, group IVB metal oxides (such as zirconia, titania) have shown unique catalytic properties in the field of catalysis as supports or catalysts due to their simultaneous acidic and basic surface centers, oxidizing and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/06B01J21/12B01J27/19C10G45/08
Inventor 徐黎明高玉兰李崇慧陈光洛亚东
Owner CHINA PETROLEUM & CHEM CORP
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