Beta zeolite and method for producing the same

By optimizing the production process of low-silica beta-zeolites through controlled removal of SDA and alkali metals, the trade-off between catalytic activity and hydrothermal durability is resolved, achieving a beta-zeolite with improved performance in high-temperature environments.

JP2026085848AActive Publication Date: 2026-05-25TOSOH CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
TOSOH CORP
Filing Date
2025-07-29
Publication Date
2026-05-25

AI Technical Summary

Technical Problem

Conventional methods for producing low-silica beta-zeolites face a trade-off between catalytic activity and hydrothermal durability, with existing processes either increasing silanol defects or reducing the active aluminum sites, leading to insufficient performance in high-temperature water vapor environments.

Method used

A method involving controlled removal of SDA and alkali metals, maintaining a specific silica-to-alumina molar ratio, and optimizing crystal structure parameters to reduce silanol defects while preserving aluminum content, resulting in a beta-zeolite with enhanced catalytic activity and hydrothermal durability.

Benefits of technology

The optimized beta-zeolite exhibits excellent catalytic activity and hydrothermal durability, suitable for high-temperature applications with reduced silanol defects and minimal structural degradation.

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Abstract

The objective is to provide at least one of the following: a beta-zeolite having excellent catalytic activity and hydrothermal resistance, and a method for producing the same. [Solution] The total alkali metal content is 0.5% by mass or less, the SDA content is 4.0% by mass or less, the molar ratio of silica to alumina is between 20 and 35, and the IR spectrum is 1860±10 cm⁻¹. -1 The height intensity of the peak with the peak top is 3735±10cm. -1 Beta zeolite having a peak top and a peak height-to-intensity ratio of 1.90 or less.
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