Hydrotreating catalyst and preparation method and application thereof

Abstract

The invention discloses a hydrotreating catalyst and a preparation method and application thereof. The preparation method of the hydrotreating catalyst comprises the steps that (1), an alumina carrieris prepared or selected; (2) the alumina carrier prepared or selected in step (1) is dipped with a nitrogenous organic acid solution or an aromatic carboxylic acid solution; (3) the alumina carrier dipped with a pyridinedicarboxylic acid solution or the aromatic carboxylic acid solution in step (2) is subjected to low temperature drying treatment; and (4) the alumina carrier subjected to low temperature drying treatment in step (3) is dipped with an active component solution or active metal and an assistant, high temperature thermal treatment is conducted after dipping, and the hydrotreatingcatalyst is prepared. The catalyst prepared by adopting the method is high in metal component dispersity and sulfidity, and is liable to be sufficiently vulcanized, the number of generated active sites is large, improvement of the activity of the catalyst is facilitated, meanwhile, the preparation method is simple, and the production cost is low.

Description

technical field [0001] The invention relates to a hydroprocessing catalyst and its preparation method and application, in particular to a hydroprocessing catalyst suitable for heavy distillate oil hydrodenitrogenation and desulfurization processes, its preparation method and application. Background technique [0002] In the process of hydrotreating, the content of impurities such as nitrogen, sulfur, oxygen and metals in crude oil continues to increase, and the degree of heavy crude oil continues to deepen, which has become a fact before people. The existence of these impurities not only makes the catalyst Poisoning, but also emit a large amount of harmful gases such as sulfur oxides and nitrogen oxides, endangering human health and environmental protection. It is one of the main reasons for the formation of haze weather. It has high activity, low cost, and stability. Catalysts with good properties can not only ease the process conditions, but also reduce hydrogen consumptio...

AI Technical Summary

Problems solved by technology

In this method, the active components are first dissolved in deionized water, and then organic carboxylic acid substances are added to form a stable complex with the main metal. The impregnating solution has the characteristics of good stability and low viscosity, but under conventional roasting conditions, Partial coking of organic carboxylic acids on the catalyst surface reduces the number of active metal centers

Chinese patent CN101089132A discloses a hydrodesulfurization catalyst with four active components of W-Mo-Ni-Co. impregnated onto the alumina carrier, but the loading amount of the active component is limited and cannot provide more total active metals; during the impregnation process, the interaction between phosphorus and the surface groups of the support will weaken the active component on the support. Adsorption makes the metal components easy to agglomerate, reduces the dispersion of the active components in the catalyst, and weakens the catalyst activity

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