Method for preparing hydrogenation catalyst

Abstract

The invention discloses a method for preparing the hydrogenation treatment catalyst, especially for preparing the hydrogenation treatment catalyst with high metal content. First, preparing high-density metallic salt solution or suspending solution; adding prepared metallic salt solution or suspending solution into adhesive agent and other additives, to be mixed uniformly, molded, dried, and sintered to attain the catalyst, whose metallic oxide is in 50-95 wt%. Compared to present technique, said invention has simple processes and lower producing cost without metal leakage. The invention can be used to prepare hydrogenation treatment catalyst with high metal content and excellent property.

Description

technical field [0001] The invention relates to a preparation method of a hydrogenation treatment catalyst, especially a preparation method of a hydrogenation treatment catalyst with high metal content. Background technique [0002] Crude oil and distillates derived from crude oil contain impurities such as sulfur, nitrogen, oxygen and metals. The existence of these impurities not only affects the stability of the oil, but also emits SO during use. x , NO x and other harmful gases pollute the environment. During the secondary processing of oil products, the presence of impurities such as sulfur, nitrogen, oxygen and metals can poison catalysts. Distillate oil hydrotreating refers to the process of contacting raw oil and hydrogen with a catalyst at a certain temperature and pressure to remove impurities and saturate aromatics. [0003] A hydrotreating catalyst with excellent performance must have excellent hydrogenation activity and certain cracking activity. In addition,...

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Problems solved by technology

[0006] Co-precipitation catalyst preparation process is complex, both require an independent precipitation process, the pH value of the two solutions needs to be adjusted before the co-precipitation process, the pH value also needs to be adjusted during the co-precipitation process, and mother liquor separation and washing processes are required, which inevitably leads to The loss of metal leads to an increase in catalyst manufacturing cost. In addition, adjusting the co-precipitation process will lead to a serious mismatch in the atomic ratio of molybdenum (and / or tungsten) to nickel (and / or cobalt) (it is generally considered that cobalt or / and nickel in hydrotreating catalysts and cobalt or / and nickel+molybdenum or / tungsten atomic ratio between 0.2 and 0.4), which reduces the activity of the catalyst, and at the same time makes a large amount of metals not well utilized