Silica-bound calcium-containing zeolite a granulate

US4950312A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Lothar Puppe · Burscheid, DE
• Gerhard Reiss · Krefeld, DE

Key dates

• Filing date: May 11, 1988
• Grant date: Aug 21, 1990
• Expiry date: May 11, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S423/24
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A SiO.sub.2 -bound, substantially carbonate-free, calcium-containing zeolite A granulate in which the calcium content is 0.4 to 1 mole CaO/mole Al.sub.2 O.sub.3 and a process for the production such SiO.sub.2 -bound calcium exchanged zeolite A granulate in a CO.sub.2 -free atmosphere at temperatures of 350.degree. C. to 700.degree. C. The SiO.sub.2 -bound zeolite granulate A being useful as an adsorbent in the recovery of oxygen by the pressure change adsorption process.