Zeolites
AssigneeImperial Chemical Industries PLC
InventorsJohn L. Casci, Mervyn D. Shannon
Life of this patent
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Abstract
A zeolite, designated NU-85, is an intergrowth of zeolites EU-1 and NU-87. The zeolite is a useful catalyst in a wide variety of hydrocarbon conversion reactions including isomerisation and alkylation.
Claims10
A zeolite, designated NU- 85, comprising intergrowth crystals of zeolites EU-1 and NU-87, said crystals containing discrete bands the structures of which are individually characteristic of the structures of zeolite EU-1 and zeolite NU-87, said bands exhibiting substantial crystal lattice continuity therebetween.
A zeolite, designated NU-85, which is an intergrowth of EU-1 and NU-87, having a composition expressed on an anhydrous basis, in terms of mole ratios of oxide, by the formula:
- 100 XO.sub.2 :
- less than or equal to 10 Y.sub.2 O.sub.3 :
- less than or equal to 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, in its as-prepared form, lattice images which, when oriented to show the 20.+-.0.2 Angstrom fringes of zeolite EU-1 exhibit intergrown 12.5.+-.0.2 Angstrom fringes together with said 20.+-.0.2 Angstrom fringes and/or a X-ray diffraction pattern including the lines shown in Table 1.
A method for the preparation of the hydrogen form of zeolite NU-85 comprising
- (i) optionally calcining as-prepared zeolite NU-85;
- and
- (ii) ion exchanging with an acid or with a solution of an ammonium salt.
A zeolite, designated NU-85, which is an intergrowth of EU-1 and NU-87, having a composition expressed on an anhydrous basis, in terms of mole ratios of oxide, by the formula:
- 100 XO.sub.2 :less than or equal to 10 Y.sub.2 O.sub.3 :less than or equal to 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, in its as-prepared form, lattice images which, when oriented to show the 20.+-.0.2 Angstrom fringes of zeolite EU-1 exhibit intergrown 12.5.+-.0.2 Angstrom fringes together with said 20.+-.0.2 Angstrom fringes and/or a X-ray diffraction pattern as shown below:
- ______________________________________ d(Angstroms) Relative Intensity* ______________________________________ 11.15 +/- 0.20 m 10.30 +/- 0.20 w.sup.(a) 6.89 +/- 0.12 w 4.66 +/- 0.10 m 4.31 +/- 0.10 vs 4.00 +/- 0.08 s-vs 3.86 +/- 0.08 w-m 3.71 +/- 0.07 m.sup.(b) 3.42 +/- 0.06 w-m 3.37 +/- 0.06 w-m.sup.(c) 3.26 +/- 0.06 s-vs 3.16 +/- 0.06 w 3.10 +/- 0.06 w 2.96 +/- 0.05 w 2.71 +/- 0.05 w ______________________________________ *Based on a relative intensity scale in which the strongest line in the Xray pattern is assigned a value of 100:
- w (weak) is less than 20 m (medium) is between 20 and 40 s (strong) is greater than 40 and less than 60 vs (very strong) is greater than 60.
Dependencies are inferred from the claim text.