Operation-starting method of sulfurized hydrogenation catalyst

Abstract

The invention relates to an operation-starting method of a sulfurized hydrogenation catalyst. The method comprises the following steps: putting the sulfurized hydrogenation catalyst into a reactor; then pumping inert gases to replace the air in the reactor and pipes in front of and at the back of the reactor and gradually raising the temperature to the activation temperature; and pumping hydrogen to replace the inert gases, adjusting the pressure and temperature to the reaction pressure and temperature after the airflow is stable and putting raw oil to begin hydrogenation. The method overcomes the defects of high preparation cost, long presulfurization time and high operation cost of the conventional oxidized catalysts. The method has the following advantages: the catalyst prepared by the method dispenses with presulfurization and has simple preparation process and operation-starting method; concentrated heat release during operation starting can be suppressed by adopting the inert gases to activate the catalyst; the method is suitable for preparing catalysts for hydrogenation of petroleum fractions; and the hydrogenation activity of the catalyst prepared by the method is superior to that of the conventional catalysts.

Description

technical field [0001] The invention relates to a start-up method of a sulfurized hydrogenation catalyst, which belongs to the improvement of the start-up method of the hydrogenation catalyst. Background technique [0002] In recent years, the trend of poor quality of crude oil in the world has become increasingly obvious, the content of sulfur, nitrogen and aromatics in petroleum products is increasing day by day, and the requirements for environmental protection in various countries are also getting higher and higher. It is obvious that there is a contradiction between the increasingly stringent environmental protection requirements and this reality More and more sharp; hydrogenation process is one of the effective means to produce clean oil, and hydrogenation catalyst is the key technology of this process. [0003] Hydrogenation catalysts are generally composed of VIII and VIB metals or metal oxides with hydrogenation functions and supports and additives with certain acid...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: long vulcanization time, high vulcanization cost, high toxicity and flammability of the vulcanizing agent, which is easy to cause pollution to people and the environment

The preparation process of the supported catalyst requires nitrogen protection, the process is complicated, the preparation cost is high, and it is not conducive to large-scale industrial production, and the hydrogenation activity of the catalyst needs to be improved

Moreover, the literature does not mention the start-up plan of sulfurized catalysts.

Images