Synthesis of ITQ-17 in the absence of fluoride ions

A process for synthesizing a crystalline material that does not contain fluorides, with a composition in a roasted state corresponding to that of the material called ITQ-17 and in that it has a composition on an anhydrous base and in terms of moles of oxides upon being synthesized, unroasted, represented by:

• xX2O3:
• (1−z)YO2:
• zGeO2:
• r/n RnO
• wherein:
• X is at least one trivalent element,
• Y is one or more tetravalent elements other than germanium,
• R is an organic structure directing compound,
• x varies between 0 and 0.02, preferably between 0 and 0.01,
• z is comprised between 0.02 and 0.67, preferably between 0.04 and 0.5,
• r varies between 0.01 and 0.5, preferably between 0.01 and 0.25, and
• n is 1 or 2,
• and whose most representative values of the X-ray diffraction angle are the following:
• 7 2Θ ± 0.5 (degrees) Intensity (I/Io) 6.89 w, m 9.57 vs 19.35 m 21.37 m 21.90 vs vs:
• very strong, m:
• medium, w:
• weak,
• and whose process comprises:
• a) preparing a synthesis mixture that comprises at least:
• a source of one or several tetravalent elements included under the name Y,
• a source of Ge,
• a source of at least one structure directing agent, and
• water;
• b) keeping the synthesis mixture at temperatures between 100 and 200° C., until the crystalline material is formed and
• c) recovering the crystalline material.