Process for preparing chemically modified micas for removal of cesium salts from aqueous solution

US6114269A · kind A · utility

Inventors

• Stephen Yates · South Barrington, US
• Irene C. G. DeFilippi · Palatine, US
• Romulus Gaita · Morton Grove, US
• Abraham Clearfield · College Station, US
• Lyudmila Bortun · College Station, US
• Anatoly Bortun · College Station, US

Key dates

• Filing date: Jan 7, 2000
• Grant date: Sep 5, 2000
• Expiry date: Jan 7, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J39/14
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A chemically modified mica composite formed by heating a trioctahedral mica in an aqueous solution of sodium chloride having a concentration of at least 1 mole/liter at a temperature greater than 180 degrees Centigrade for at least 20 hours, thereby replacing exchangeable ions in the mica with sodium. Formation is accomplished at temperatures and pressures which are easily accessed by industrial equipment. The reagent employed is inexpensive and non-hazardous, and generates a precipitate which is readily separated from the modified mica.