Zeolites Nu-6(1) and Nu-6(2)
AssigneeImperial Chemical Industries PLC
InventorThomas V. Whittam
Life of this patent
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Abstract
New zeolite materials designated Nu-6(1) and Nu-6(2), having molar compositions expressed by the formula: 0.5 to 1.5 R.sub.2 O:Y.sub.2 O.sub.3 :at least 10 XO.sub.2 :0 to 2000 H.sub.2 O wherein R is a monovalent cation or .sup.1 /n of a cation of valency n, X is silicon, and/or germanium, Y is one or more of aluminum, iron, chromium, vanadium, molybdenum, antimony, arsenic, manganese, gallium or boron, and H.sub.2 O is water of hydration additional to water notionally present when R is H and having defined X-ray diffraction patterns, are prepared from a reaction mixture containing XO.sub.2 (preferably silica), Y.sub.2 O.sub.3 (preferably alumina) and a 4,4'-bipyridyl compound. At temperatures of 200.degree. C. or higher, Nu-6(1) is converted to Nu-6(2), a useful catalyst for xylenes isomerization and the like.
Claims23
Zeolite and Nu-6(2) having molar compositions expressed by the following formula:
- 0.5 to 1.5 R.sub.2 O:
- Y.sub.2 O.sub.3 :
- at least 10 XO.sub.2 :
- 0 to 2000 H.sub.2 O
- wherein R is a monovalent cation or 1/n of a cation of valency n, X is silicon, and/or germanium, Y is one or more of aluminum, iron, chromium. vanadium, molybdenum, antimony, arsenic, manganese, gallium or boron, and H.sub.2 O is water of hydration additional to water notionally present when R is H, and having X-ray diffraction patterns substantially as set out in Table 2.
A method of making zeolite precursor material Nu-6(1) having molar compositions expressed by the following formula 0.5 to 1.5 R.sub.2 O:
- Y.sub.2 O.sub.3 :
- at least 10 XO.sub.2 :
- 0 to 2000 H.sub.2 O wherein R is a monovalent cation or 1/n of a cation of valency n, x is silicon and/or germanium, Y is one or more of aluminum, iron, chromium, vanadium, molybdenum, antimony, arsenic, manganese, gallium or boron, and H.sub.2 O is water of hydration additional to water notionally present when R is H, and having diffraction patterns substantially as set out in Table 1, which method comprises reacting an aqueous mixture containing at least one oxide XO.sub.2, at least one oxide Y.sub.2 O.sub.3 and a 4,4'-bipyridyl compound.
A method of making zeolite Nu-6(2) which comprises heating zeolite Nu-6(1) at a temperature in the range 200.degree. to 750.degree. C.
Zeolite precursor material Nu-6(1) having molar compositions expressed by the following formula:
- 0.5 to 1.5 R.sub.2 O:
- Y.sub.2 O.sub.3 :
- at least 10 XO.sub.2 :
- 0 to 2000 H.sub.2 O wherein R is a monovalent cation or 1/n of a cation of valency n, X is silicon, and/or germanium, Y is one or more of aluminum, iron, chromium, vanadium, molybdenum, antimony, arsenic, manganese, gallium or boron, and H.sub.2 O is water of hydration additional to water notionally present when R is H, and having X-ray diffraction patterns substantially as set out in Table 1.
Dependencies are inferred from the claim text.