Hydrogenation catalysts composite protective agent and manufacturing method thereof

Abstract

The composite protectant for hydrogenation catalyst includes one protectant substrate of ceramic, and one layer of Mo or Ni oxide supported on the surface of the protectant substrate and combined closely through high temperature sintering. The porous composite protectant can support the main catalyst during the hydrogenation reaction process, filter off organic impurity from the material oil to avoid catalyst poisoning and prevent raise in pressure drop in the reactor, and raise catalysis efficiency with the supported Mo or Ni oxide to participate the hydrogenating polymerization reaction. The composite protectant may be applied widely as catalyst protectant in the petroleum hydrogenating process.

Description

Technical field [0001] The invention relates to a composite protective agent for catalysts in the petrochemical industry and a preparation method thereof. In particular, it is a ceramic composite protective agent used for active protection of a catalyst for petroleum cracking and hydrogenation and a preparation method thereof. Background technique [0002] At present, various reactors or fractionation devices such as petrochemical industry and fine chemical industry are using ceramic catalyst protective agents in order to avoid severe cracking reactions. These ceramic protective agents are composed of aluminum oxide and silica. It is made by ceramic production techniques such as batching, crushing, molding and firing. This porcelain protective agent basically does not react with the catalyst, and has the characteristics of high temperature resistance and high pressure resistance, and can meet the requirements of the petrochemical industry for the use environment of the catalyst ...

AI Technical Summary

Problems solved by technology

However, in recent years, due to the increase in the production of heavy oil, the impurities in crude oil processed by some refineries such as colloids, asphaltenes and iron have increased. When refineries and petrochemical companies process certain distillates, the reactor The catalyst activity in the bed layer decreased rapidly, causing almost all the specific surface area and pore volume of these catalysts to be lost. Catalyst agglomeration (coking), the pressure drop of the reactor rises too fast, which affects the service life of the catalyst

And the general ceramic catalyst protection agent is mostly a solid ceramic body, which only plays a general supporting role for the catalyst, and cannot eliminate the influence of metal organic compounds such as colloids, asphaltenes and iron in the raw oil on the catalyst poisoning.