Methods of preparing cationic layer compounds, cationic layer compounds prepared thereby, and methods of use therefor

US6362261B1 · kind B1 · utility

Assignee

• Cognis Deutschland GmbH · DE

Inventors

• Ilona Lange · Langenfeld, DE
• Joerg-Dieter Klamann · Bremerhaven, DE
• Peter Daute · Beverstedt, DE
• Juergen Foell · Goldkronach, DE
• Peter Wedl · Loxstedt, DE
• Stefan Kuepper · Hilden, DE

Key dates

• Filing date: Oct 2, 2000
• Grant date: Mar 26, 2002
• Expiry date: Oct 2, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01F7/785
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method of preparing a modified cationic layer compound which includes providing a layer compound of the general formula (I):[EeZzDdVv(OH−)x](An−)a.qH2O  (I)wherein E represents one or more monovalent alkali metal cations, e represents a number of from 0 to about 2, Z represents one or more divalent metal cations, z represents a number of from 0 to about 6, D represents one or more trivalent metal cations, d represents a number of from 0 to about 3, V represents one or more tetravalent metal cations, v represents a number of from 0 to about 1, (An−) represents an acid anion wherein n represents an integer of from 1 to 3, q represents a number of from about 1 to about 10, and wherein x>a and e+2z+3d+4v=x+na; subjecting the layer compound to crystallization to provide a resultant material; and subjecting the resultant material to steam drying at a temperature of from about 200° C. to about 260° C. for a period of time of from about 3 to about 6 hours, said steam drying comprising passing a source of steam continuously over the resultant material at a rate of from about 0.001 to about 10 moles of water per hour, per kilogram of the resultant mate…