Zeolites
AssigneeImperial Chemical Industries PLC
InventorJohn L. Casci
Life of this patent
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Abstract
A zeolite, designated zeolite NU-86, having a molar composition expressed by the formula 100 XO.sub.2 : equal to or less than 10 Y.sub.2 O.sub.3 : equal to less than 20 R.sub.2/n O where R is one or more cations of valency n, X is silicon and/or germanium, Y is one or more of aluminum, iron, gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese and having an X-ray diffraction pattern including the lines shown in Table 1 is prepared from a reaction mixture comprising XO.sub.2 (preferably silica), Y.sub.2 O.sub.3 (preferably alumina) and a polymethylene alpha, omega-diammonium cation. This zeolite is a useful catalyst for a variety of reactions.
Claims18
A zeolite, designated NU-86, having a composition expressed on an anhydrous basis (in terms of mole ratios of oxide) by the formula:
- 100 XO.sub.2 :
- equal to or less than 10 Y.sub.2 O.sub.3 :
- equal to or less than 20 R.sub.2/n O where R is one or more cations of valency n, X is silicon and/or germanium, Y is one or more of aluminum, iron, gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese and having an X-ray diffraction pattern including the lines shown in Table 1 below:
- TABLE 1 ______________________________________ d(Angstroms) Relative Intensity ______________________________________ 11.8 .+-. 0.15 w-m 11.10 .+-. 0.15 w-m (a) 10.65 .+-. 0.15 w 8.60 .+-. 0.15 w 4.22 .+-. 0.10 m 4.15 .+-. 0.10 m (**) 4.10 .+-. 0.10 w-m 3.94 .+-. 0.08 vs 3.88 .+-. 0.08 .sup. s-vs 3.74 .+-. 0.07 m 3.45 .+-. 0.06 w 3.35 .+-. 0.06 w 3.11 .+-. 0.06 w 2.07 .+-. 0.04 w ______________________________________
- where w=less than 20, m=between 20 and 40, s=greater than 40 but less than 60, vs=greater than 60, (a)=broad asymmetric reflection containing a number of peaks, the major ones of which are those occurring at d-spacings of 11.8, 11.10, and 10.65 Angstroms, and (**)=a doublet.
A method for the preparation of the hydrogen form of zeolite NU-86 comprising
- i) optionally calcining as-prepared zeolite NU-86;
- and
- ii) ion exchanging with an acid or with a solution of an ammonium salt.
Dependencies are inferred from the claim text.