A kind of start-up vulcanization method of hydrogenation catalyst

Abstract

A gaseous starting method for a hydrocracker containing a hydrogenation catalyst with second type active centers is provided. The method utilizes a plurality of hydrogen sulfide containing gases in industrial equipment to pre-protect the catalyst before sulfuration, and a formed gas protective film can completely avoid decomposition of auxiliary agents in the catalyst, thus avoiding problems which are activity loss and increased material consumption in a starting process, saving energy and greatly improving using activity of the catalyst.

Description

technical field [0001] The invention relates to a start-up sulfidation method of a hydrogenation catalyst, especially for a catalyst containing a second type of active center, mainly by using various industrial gases containing hydrogen sulfide to pre-protect the catalyst so that it can be started in a dry process , to achieve the purpose of improving catalyst activity, and is suitable for the sulfuration process of various second-type active center catalysts. Background technique [0002] At present, due to the increasingly heavy crude oil in the world and the strict requirements of environmental protection regulations, the quality of raw materials processed by hydrogenation devices is deteriorating year by year. Various impurities contained in raw materials, including metals, The content of reactants such as sulfur and nitrogen is on the rise. In this harsh environment, catalyst developers in various countries have regarded the renewal and progress of catalyst activity as ...

AI Technical Summary

Problems solved by technology

[0007] 1. Various compounds in the starting oil will cause coking of the catalyst

[0008] 2. The end of vulcanization is advanced, the degree of strengthening in the catalyst is weakened, and the degree of initial vulcanization is not sufficient

[0009] 3. Gas, liquid and solid phases exist at the same time, which affects the logistics distribution and causes uneven sulfuration of the catalyst

[0010] 4. The vulcanization and passivation process is carried out at the same time, and the consumption of reagents increases

[0011] 5. Highly active cracking agents and oil products exist at the same time, and the risk of over-temperature increases

[0012] To sum up, in order to adapt to the change of the catalyst type, the start-up mode will increase the material consumption, increase the operation risk, and reduce the catalyst activity. Compared with the catalyst activity improved by adding additives, it is still very important. incomparable

[0013] CN103773436A and CN102311766A introduced the start-up method of the hydrogenation catalyst of the second type of active center. Although more second-type active centers can be generated under this method, liquid components need to be introduced, which still belongs to the mode of wet start-up, and cannot be thoroughly Solve the inherent disadvantages of the liquid phase sulfurization process and the damage to the catalyst activity

[0015] CN101003749A introduces a hydrocracking start-up method that does not require the use of vulcanizing agents in the whole process. Although the operation is simple and the process is easy, it is difficult to ensure the oxidation state and the cracking activity and activity stability of the elemental metal catalyst

Images