Alkali-free synthesis of zeolitic materials of the LEV-type structure

US9334171B2 · kind B2 · utility

Assignees

• BASF SE
• Tokyo Institute of Technology · JP

Inventors

• Bilge Yilmaz · Mannheim, DE
• Ulrich Müller · Neustadt, DE
• Meike Pfaff · Neunkirchen, DE
• Hermann Gies · Sprockhövel, DE
• Feng Xiao · Xuchang, CN
• Takashi Tatsumi · Kawasaki, JP
• Xinhe Bao · 东风镇, CN
• Weiping Zhang · Beijing, CN
• Dirk De Vos · Leuven, BE
• Hiroyuki Imai · Tokyo, JP
• Bin Xie · Beijing, CN
• Haiyan Zhang · Nanhu, CN

Key dates

• Filing date: Jun 17, 2011
• Grant date: May 10, 2016
• Expiry date: Feb 14, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P30/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for the production of a zeolitic material having an LEV-type framework structure comprising YO2 and optionally comprising X203, wherein said process comprises preparing a mixture comprising one or more sources for YO2, one or more solvents, and optionally comprising seed crystals; and crystallizing the mixture; wherein Y is a tetravalent element, and X is a trivalent element, and wherein the crystallized mixture contains 0.1 wt.-% or less, more preferably 0.01 wt.-% or less of one or more metals M based on 100 wt.-% of YO2, wherein even more preferably the crystallized mixture contains no metal M, wherein M stands for sodium and/or potassium, wherein preferably M stands for the group of alkali and alkaline earth metals.