Hydrotreating catalyst and preparation method thereof

Abstract

The invention discloses a bulk hydrotreating catalyst and a preparation method thereof. The catalyst comprises three active metal components, namely Mo, W and Ni, and the sum of active metal oxides is 30 to 70 weight percent. In the method, a proper amount of water-soluble nitrogen-containing compound is added in the bulk catalyst gelatinating process, the pore structure of the catalyst is improved, more metal active sites are exposed on the surface of the catalyst, the utilization rate of active metals is improved, the catalyst has obviously high activity compared with the common bulk catalyst under the condition of the same metal content, and the consumption of the active metals for the common bulk catalyst can be reduced and the preparation cost of the catalyst can be reduced under thecondition of the equivalent activity. In addition, the bulk catalyst has increased pore diameter and pore volume, the Ni-W high active center is fully utilized, complicated macromolecules are easier to contact the active center, and the effect is particularly more obvious when the catalyst treats distillates with high macromolecule content.

Description

technical field [0001] The invention relates to a hydrogenation treatment catalyst and a preparation method thereof, in particular to a high-activity bulk phase hydrogenation treatment catalyst and a preparation method thereof. Background technique [0002] At present, in the world, crude oil is becoming increasingly heavy and inferior, coupled with the continuous development of the world economy and increasingly stringent environmental protection regulations, it is necessary to produce a large amount of light and clean fuels, all of which require the improvement and improvement of the existing refining technology. Produce products that meet the requirements at the lowest cost. Crude oil and various distillates obtained 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 ...

AI Technical Summary

Problems solved by technology

Due to the high metal content of the catalyst prepared by this method, there is often a lack of sufficient interaction between the metal and alumina, resulting in poor catalyst strength

The active component part is composed of a large number of metals, and some internal metal components cannot be fully utilized during the formation of Ni-Mo or Ni-Mo-W powder, resulting in loss of activity, and this problem cannot be solved by simple bonding

CN 1342102A discloses a mixed metal catalyst, which is obtained by co-precipitating three active metals. Its main disadvantage is that no coordination effect between different active metals has been found

In the prior art, only emphasis is placed on the type and content of metals and the coordination and cooperation between different metals. How to make the catalyst have a reasonable pore structure and a high content of active metal components to fully play its role, and the catalyst has more Good hydrogenation activity and other aspects are not involved

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