Hydroprocessing catalyst and its uses

Abstract

The invention disclosed a hydrogenating catalyst and its application. The catalyst contains not only hydrogenating active metal and alumina, it also contains silicon oxide, titanium oxide and molecular sieve (one kind or many kinds of them) and stabilizing agent iron, magnesium, zinc, gallium, calcium and barium (one kind or many kinds of them). The catalyst can stabilize the sulphur in the catalyst's sulfurized active phase so as to avoid the loss of sulphur in the active phase and improve the catalyst's stability substantially, especially under the conditions of low sulphur content or no sulphur at all. The invention can especially be used in the hydrodesulfurization and hydrogenation de-arene of distillate.

Description

Technical field [0001] The invention relates to a hydroprocessing catalyst. More specifically, the present invention relates to a catalyst capable of stabilizing the sulfided active phase in a low-sulfur or sulfur-free environment, and is particularly suitable for ultra-deep hydrodesulfurization, hydrodenitrogenation and hydrodearomatization of distillate oil. process. Background technique [0002] As the society attaches great importance to the environment and human health, environmental protection laws and regulations have increasingly strict requirements on the sulfur content in petroleum products, especially diesel fractions. The current sulfur content in diesel fractions of 0.05 wt% to 0.10 wt% is acceptable Yes, but soon the sulfur content will be required to be less than 0.05wt%, and the sulfur content will be required to be less than 350μg / g or even lower in the foreseeable future, and the 95% point of diesel fuel will be required to be less than 350℃. Whether this standa...

AI Technical Summary

Problems solved by technology

At present, precious metal catalysts are generally used in the production of ultra-clean petroleum products, because this type of catalyst has high activity in a relatively "clean" environment, and the operating conditions are relatively mild, but the price of precious metals is very expensive, which greatly restricts its use. Application on industrial equipment

In general, the active phase of non-precious metal catalysts is in the sulfurized state. To maintain the activity of the catalyst, the active phase in the sulfurized state in the catalyst must not be lost. There is an equilibrium between the active phase in the sulfurized state and hydrogen itself, and sulfur is very weak in a low-sulfur environment. It is easy to lose and lead to a decrease in catalyst activity and stability. At present, there is no report on stabilizing the sulfurized active phase in the catalyst to improve catalyst activity and stability.

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