A modification method of ferrierite, a ferrierite and its application

Abstract

The invention discloses a modification method of ferrierite and the modified ferrierite obtained by the method and its application. The method comprises: under the condition of solution, the ferrierite to be modified is mixed with an ammonium-containing compound For the first contact, the ammonium-containing compounds include ammonium nitrate and ammonium fluorosilicate. When the modified ferrierite obtained by the modification method of the present invention is used in the isomerization reaction, especially when used in the olefin isomerization reaction, the conversion rate of the reaction substrate and the selectivity of the product can be significantly improved, and the present invention The modified method has the advantages of simple method, low cost and suitable for industrial production.

Description

technical field [0001] The invention relates to a modification method of ferrierite, ferrierite and application thereof. Background technique [0002] In recent years, due to the promulgation of various environmental protection policies and the promotion and use of unleaded gasoline, the demand for high-octane additives such as MTBE and ETBE has grown rapidly around the world. The dramatic increase. Coupled with the development and utilization of isobutene downstream products, the isobutene produced by traditional petroleum catalytic cracking is far from meeting the current demand. Therefore, expanding the source of isobutene and increasing the output of isobutene have become the top priority of petrochemical development. [0003] At present, methods for producing isobutene, such as sulfuric acid extraction, resin dehydration, tert-butanol dehydration, and isobutane dehydrogenation, have not been widely promoted due to environmental pollution, equipment corrosion, and conve...

AI Technical Summary

Problems solved by technology

However, the selectivity of the reaction substrate often decreases with the increase of the acidity of the molecular sieve

And even the prior art of US5523510 that combines acid treatment and steam treatment will also cause the conversion rate and selectivity of the reaction to be all low due to the severe dealumination of molecular sieves

Therefore, the steam treatment means and / or acid treatment means conventionally used by those skilled in the art cannot obtain the catalysts with excellent performance expected by researchers.

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