Catalytic cracking double-metal deactivator

Abstract

The invention discloses a catalytic cracking double-metal deactivator. The catalytic cracking double-metal deactivator mainly comprises an antimony single agent and a cerium single agent and is characterized in that the content of antimony in the antimony single agent is 17-21%, the content of cerium in the cerium single agent is 6-9%, and the rest is water. A preparation method of the catalytic cracking double-metal deactivator comprises the following steps of: (1) preparation of the antimony single agent: sequentially adding water, tartaric acid and antimony oxide to a reaction kettle for reaction, adding monoethanolamine to prevent blasting boiling, heating till boiling, refluxing for 20-40 min, and emptying after cooling, thus obtaining the antimony single agent; and (2) preparation of the cerium single agent: adding water, tartaric acid and monoethanolamine together to a reaction kettle for reaction, adding rare earth powder to prevent carbon dioxide from generating and overflowing from the reaction kettle, stirring and heating to boil at 102 DEG C after completing dropwise addition, refluxing for 1-2h, and emptying after cooling, thus obtaining the cerium single agent; and (3) compounding of the antimony single agent and the cerium single agent: uniformly mixing and stirring the antimony single agent and the cerium single agent to obtain the double-metal deactivator.

Description

technical field [0001] The invention relates to a catalytic cracking metal passivator, in particular to a catalytic cracking bimetal passivator. Background technique [0002] In the process of catalytic cracking, especially in the process of catalytic cracking with heavy oil as raw material, heavy metals contained in raw oil, such as nickel, vanadium, copper, iron and other heavy metals, will deposit on the surface of the catalyst, causing catalyst poisoning, deactivation and selectivity. As a result, the yield of light oil decreased, and the yield of hydrogen and coke increased. For the metal pollution of catalytic cracking catalysts, in addition to demetallization pretreatment of raw materials and selection of catalysts with strong metal resistance, the industry can also improve the properties of catalysts by increasing the replacement rate of catalysts, and use passivators to inhibit The poisonous effect of the metal in the raw material on the catalyst. Among them, the ...

AI Technical Summary

Problems solved by technology

The multifunctional passivator currently used in industry not only has high toxicity and poor compounding performance, but also increases the amount of CO combustion accelerant

[0004] CN102513163A reports a water-soluble catalytic cracking metal passivator and a preparation method thereof. In the method, antimony pentoxide hydrosol is used as a passivating nickel agent, and an aqueous solution of an organic acid salt of lanthanum or cerium is used as a passivating agent for vanadium. Vanadium passivating agent and vanadium passivating agent are compounded and used, because the preparation of passivating nickel antimony pentoxide hydrosol uses hydrogen peroxide and alcohol amine, and hydrogen peroxide encounters alcohol amine violently exothermic, therefore, the reaction process is not easy to control, and it is easy to cause an explosion. Has a certain degree of danger

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