Zeolites and molecular sieves and the use thereof

US6809055B2 · kind B2 · utility

Assignee

• ABB Lummus Global Inc. · US

Inventors

• Rudolf Overbeek · Madison, US
• Nelleke van der Puil · Amsterdam, NL
• Chuen Y. Yeh · Edison, US
• Lawrence L. Murrell · South Plainfield, US
• Yun-Feng Chang · Houston, US
• Philip J. Angevine · Mantua, US
• Johannes Hendrik Koegler · Heidelberg, DE

Key dates

• Filing date: Oct 17, 2001
• Grant date: Oct 26, 2004
• Expiry date: Jan 16, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2529/40
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An improved zeolite having a high number of strong acid sites wherein said zeolite has an AAI of at least 1.0. In a preferred embodiment, such zeolite is produced by controlling conditions after production of the crystalline structure such that loss of tetrahedral aluminum is minimized to thereby provide a zeolite with the above defined AAI.