Patent · US Active

Introducing mesoporosity into zeolite materials with a modified acid pre-treatment step

US9662640B2 · kind B2 · utility

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159References
34Claims
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Key dates

Filing dateDec 27, 2013
Grant dateMay 30, 2017
Priority date—
Expiry dateDec 8, 2035

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB01J2229/38
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

Methods for introducing mesoporosity into zeolite materials that employ an acid pretreatment step are provided. By utilizing a non-acidic chelating agent during the acid treatment step, the zeolite material can be pretreated with a strong acid, often in higher concentrations or over shorter contact times, than had previously been contemplated. The resulting acid-treated mesoporous materials retain desirable properties, including Si/Al, UCS, and total mesopore and micropore volume. The ability to use a stronger acid without damaging the zeolite material results in a less expensive process capable of producing mesoporous zeolite materials suitable for a wide range of uses.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.