Composition of boehmite and silicon-containing compound and silicon oxide-alumina prepared from same

Abstract

The invention discloses a composition of boehmite and a silicon-containing compound and silicon oxide-alumina prepared from the same. The composition of the boehmite and the silicon-containing compound is characterized in that: the boehmite comprises at least one boehmite P1 of which n is less than or equal to 1.1 or more than or equal to 2.5, wherein n is equal to D (031) / D (120); the D (031) expresses a grain size of a crystal face represented by 031 peak in an X-ray diffraction (XRD) spectrum of boehmite grains; the D (120) expresses the grain size of the crystal face represented by 120 peak in the XRD spectrum of the boehmite grains; the 031 peak indicates the peak that 2 theta is 34 to 43 DEG in the XRD spectrum; the 120 peak indicates the peak that the 2 theta is 23 to 33 DEG in theXRD spectrum; D is equal to K lambda / (Bcos theta); the K is Scherrer constant; the lambda is the diffraction wavelength of a target-type material; B is the peak breadth of a diffraction peak; and the2 theta is the position of the diffraction peak. Compared with the prior art, a hydrogenation catalyst which is prepared from the silicon oxide-alumina provided by the invention has high hydrocarbon hydrotreating performance.

Description

technical field [0001] The invention relates to a composition of pseudo-boehmite and a silicon-containing compound and silica-alumina prepared therefrom. Background technique [0002] Silica-alumina is often used as an adsorbent or catalyst carrier because of its good pore structure, specific surface, heat resistance stability and solid acid properties. In the prior art, there are many reports on silica-alumina supports and their preparation methods. For example: [0003] Literature ("Preparation of alumina-silica nano-powder and research on rare earth doping modification", Functional Materials, 2004, Volume 35 No. 6, page 788) reported a kind of alumina-silica nano-powder The preparation of the body, including the use of nano-scale active Al(OH)x prepared by hydrolysis of aluminum powder as aluminum raw material, water glass as silicon raw material, and Al 2 o 3 / SiO 2 =2:1 is the basic formula, after introducing an appropriate amount of dispersant, mix thoroughly. Th...

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Problems solved by technology

[0016] Although there are many different methods of preparing pseudo-boehmite in the prior art, and the performance of the obtained pseudo-boehmite is superior in some respects, however, when mixing them with silicon-containing compounds to prepare silica-oxide Aluminum supports, and then these supports are used to prepare catalysts, especially when preparing hydrogenation catalysts, the performance of the catalysts, such as aromatics saturation performance and hydrodesulfurization activity is still low

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