Cracking catalyst containing nanometer rare-earth oxide and method of preparing the same

Abstract

The present invention relates to a cracking catalyst comprising a nano rare earth oxide and a preparation method of the catalyst. The present invention is characterized in that a compound consisting of a rare earth Y molecular sieve (15-50 weight percent), a silica and / or aluminum bonding agent (10-30 weight percent, the nano rare earth oxide (0.5-20 weight percent), a natural inorganic packing substance (10-60 weight percent), and other active components (0-10 weight percent) is molded into the microsphere cracking catalyst after the spray drying. The rare earth content is 0-30 weight percent calculated based on the rare earth oxide, and the select content of the rare earth is 1-10 weight percent. The cracking catalyst is characterized in that the catalyst is provided with the excellent heavy oil conversion capability and promotes the hydrothermal stability, so the catalyst is more suitable for the long-period use on a cracking catalysis device under the highly rigor renewal condition; the catalyst improves the product distribution and reduces the alkene content and the sulfur content of the catalytically cracked gasoline.

Description

technical field [0001] The present invention relates to a cracking catalyst containing nano-rare earth oxides and its preparation method, and more particularly to a cracking catalyst containing nano-rare earth oxides with strong heavy oil cracking ability and good hydrothermal stability and its preparation method . Background technique [0002] Catalytic cracking is the most important production technology in refineries today. Catalytic cracking units are used to convert heavy and residual oils into gasoline, diesel and light gas components. As the raw oil becomes heavier, the content of olefins and sulfur in the cracked products also increases. However, after entering the atmosphere, olefins and sulfur will undergo photochemical reactions to generate ozone and acid rain, which will seriously pollute the environment, and the presence of olefins will cause serious pollution. Affect the stability of gasoline and the use of the engine. [0003] Since the beginning of the 21s...

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Problems solved by technology

[0014] In short, the existing cracking catalysts for industrial application cannot well adapt to the trend of heavy feed oil; their hydrothermal activity stability is also poor, which increases the economic operation cost