Alumina shaped body, preparation method and application thereof, catalyst, preparation method and hydrotreating method
A molding and alumina technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, catalyst carriers, etc., can solve problems such as transfer difficulties, molding interference, and secondary dust pollution. To achieve the effect of simple process, avoid dust pollution, and improve the working environment
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[0051] According to the first aspect of the present invention, the present invention provides a method for preparing an alumina molded body, the method comprising the following steps: (1) molding a boron-containing hydrated alumina composition to obtain a molded body;
[0052] Optionally, (2) drying the molded product obtained in step (1) to obtain a dried molded product;
[0053] (3) In the presence of water vapor, calcining the molded product obtained in step (1) or the dried molded product obtained in step (2) in an oxygen-containing atmosphere.
[0054] In step (1), the boron-containing hydrated alumina composition contains hydrated alumina, a compound having at least two proton acceptor sites, and a boron-containing compound.
[0055] The alumina hydrate may be one or more selected from alumina trihydrate and alumina monohydrate. The hydrated alumina preferably contains alumina monohydrate, more preferably alumina monohydrate. Specific examples of the hydrated alumina m...
Embodiment 1
[0198] The hydrated alumina wet gel used in this example is the addition of boric acid to the hydrated alumina gel solution prepared by the acid method (sodium metaaluminate-aluminum sulfate method, obtained from Sinopec Changling Branch) during the aging process, The boron-containing pseudo-boehmite wet filter cake (this wet filter cake is numbered as SLB-1) obtained after washing with a belt filter has been measured, and the i value of this wet filter cake is 78%. 2 o 3 The calculated boron content is 5% by weight.
[0199] (1) Put 200g of wet filter cake numbered SLB-1 in a beaker, then add 5g of methylcellulose (purchased from Zhejiang Haishen Chemical Co., Ltd., the same below) and 3g of scallop powder (galactomannan The content is 80% by weight, purchased from Beijing Chemical Reagent Company, the same below), and after being stirred by a mechanical stirrer for 10 minutes, the obtained mixture is the boron-containing hydrated alumina composition of the present invention...
Embodiment 2
[0205] The aluminum oxide molded body was prepared by the same method as that in Example 1, except that the step (1) did not use turnip powder, and the amount of hydroxyethyl methylcellulose was 7.4 g. The property parameters of the prepared alumina shaped bodies are listed in Table 1.
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