Patent ID: 6696033
Filing Date: 2004-02-24
Classification: B01J,C01B

Abstract:
A swollen laminar precursor, called PREITQ-18, having an X-ray diffractogram which comprises the following values of the basal spaces and relative intensities:d (Ã¥)I/I0 * 10036.86vs21.43m13.38m11.23w10.05w6.93w6.78w4.54w4.31m4.14m4.00m3.86m3.73m3.61m3.49m3.40m3.38m3.34w2.48wwherein â€œsâ€ , â€œvsâ€ , â€œwâ€  and â€œmâ€  mean â€œstrongâ€ , â€œvery strongâ€ , â€œweakâ€  and â€œmediumâ€ , respectively, and which is the precursor of an oxide material called ITQ-18 having, in its calcinated form, a chemical composition represented by the formula (XO2)n(Y2O3)m(H2O)p, wherein X represents at least a tetravalent element and Y represents at least a trivalent element.