Patent · US Expired

Process for activating layered silicates

US5869415A · kind A · utility

5Cited by

17References

15Claims

0Family size

Assignee

Sud Chemie, Inc. · US

Inventors

Jose Antonio Ortiz · Puebla, MX
Carlos Martinez Reyes · Puebla, MX
Walter Reinking Cejudo · Puebla, MX
Werner Zschau · Germering, DE
Christain Fabry · Munich, DE
Hermann Ebert · Landshut, DE

Key dates

Filing date	Jun 12, 1996
Grant date	Feb 9, 1999
Priority date	—
Expiry date	Jun 12, 2016

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J21/16
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process is described for activation of layered silicates having an ion exchange capacity (IEC) of at least 25 meq/g by treating them with an acid, characterized in that the layered silicate is activated with about 1 to 10% by weight (based on the dry layered silicate) of an acid at a temperature of not more than 80.degree. C. and the activated layered silicate is calcined at temperatures of about 200.degree. to 400.degree. C. and comminuted desired.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.