Hydrotreating catalyst and application thereof

Abstract

The invention discloses a hydrotreating catalyst and application thereof. The catalyst contains a carrier, at least one metal component selected from VIII group and at least one metal component selected from VIB group, wherein the carrier contains silicon oxide-aluminum oxide. The catalyst is characterized in that: the silicon oxide-aluminum oxide is obtained by roasting a composite of boehmite and a silicon compound-containing composition, wherein the boehmite comprises at least one boehmite P1, wherein n is more than or equal to 1.1 and less than or equal to 2.5. n is equal to D(031) / D(120), wherein the D(031) represents the crystalline grain size of a crystal face represented by the 031 peak in an XRD spectrogram of boehmite grains; the D(120) represents the crystalline grain size of the crystal face represented by the 120 peak in the XRD spectrogram of the boehmite grains; the 031 peak is the peak of which the 2 theta is 34 to 43 degrees in the XRD spectrogram; and the 120 peak isthe peak of which the 2 theta is 23 to 33 degrees in the XRD spectrogram. D is equal to K lambda / (Bcos theta), wherein K is Scherrer constant; lambda is diffraction wavelength of a target-shaped material; B is the peak breadth, at half height, of a diffraction peak; and 2 theta is the position of the diffraction peak. Compared with the prior art, the hydrotreating performance of the catalyst provided by the invention is obviously improved.

Description

technical field [0001] The invention relates to a hydroprocessing catalyst and its application. Background technique [0002] Hydrofining or hydrotreating of hydrocarbon raw materials is a process commonly used in the petroleum refining industry. Its main function is to remove impurities such as sulfur, nitrogen, metals, aromatics, and residual carbon in hydrocarbon raw materials. Through hydrotreating, clean light oil products can be directly obtained, for example, clean diesel products can be obtained after hydrotreating diesel oil; or the properties of hydrocarbon raw materials can be improved, such as pretreatment of FCC raw materials, the properties of which are improved The hydrocarbon feedstock is then used as a feed to the FCC process to increase the efficiency of the FCC process. Hydrogenation catalysts used in hydrotreating processes typically consist of a support (eg, alumina, silica-alumina) comprising Group VIB (eg, molybdenum or tungsten) and Group VIII metal ...

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Problems solved by technology

[0021] 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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