Patent ID: 7947244

Claim:
A process for the preparation of a framework silicate comprising at least silicon and oxygen, comprising: (1) mixing silicon dioxide and/or silicon dioxide precursor with an aqueous solution comprising at least one tetraalkylammonium compound comprising R 1 R 2 R 3 R 4 N + and at least one base, wherein R 1 and R 2 are methyl and both R 3 and R 4 are n-propyl to provide a colloidal solution; (2) heating, for a time ranging from 12 h to 260 h said colloidal solution to a temperature and pressure in a range of from a temperature which is greater than the boiling point of the colloidal solution under a chosen pressure to 180° C. at atmospheric pressure to give a suspension comprising at least one sheet silicate, and (3) calcining a first part of the sheet silicate obtained according to (2) to give the framework silicate, wherein a second part of the sheet silicate obtained according to (2), which is not calcined and comprises at least silicon and oxygen, is added as a crystallization auxiliary in (1).