A kind of hydrogenation treatment catalyst and its preparation method and application

Abstract

The invention discloses a hydrotreating catalyst and its preparation method and application, comprising: (1) preparing or selecting an alumina carrier; (2) impregnating the alumina carrier prepared or selected in step (1) and containing nitrogen atoms and sulfur (3) Perform low-temperature drying treatment on the alumina carrier impregnated with organic compounds containing nitrogen atoms and sulfur atoms in step (2); (4) The impregnation activity of the alumina carrier after step (3) low-temperature drying treatment Component solutions or active metals and additives are impregnated and subjected to high-temperature heat treatment to obtain a hydrogenation catalyst. The catalyst prepared by the method not only has high metal component dispersity and sulfidation degree, is easy to be fully sulfided, and generates many active sites, which is beneficial to the improvement of catalyst activity, but also has a simple preparation method and low production cost.

Description

technical field [0001] The present invention relates to a hydrotreating catalyst, its preparation method and application, in particular to a hydrotreating catalyst suitable for heavy distillate oil hydrodenitrogenation and desulfurization process, and 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 crude oil heaviness continues to deepen. It also emits a large amount of harmful gases such as sulfur oxides and nitrogen oxides, which endangers 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. The catalyst with good performance can not only ease the process conditions, but also reduce the hydrogen consumption and achieve the effect of energy saving and consumption reduction. [0003] The process of ...

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