Zeolites

Claim 2

A zeolite, designated NU-87, having a composition expressed on an anhydrous basis (in terms of mole ratios of oxide) by the formula: 100 XO₂ : equal to or less than 10 Y₂O₃ : equal to or less than 20 R 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 aluminium, 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.

Claim 3

A zeolite as claimed in claim 1 having an X-ray diffraction pattern substantially as shown in Table 10.

Claim 4

A zeolite as claimed in claim 1 wherein the composition is expressed by the formula: 100 XO₂ : equal to or less than 4 Y₂O₃ : equal to or less than 8.0 R 2/n O

Claim 5

An as-prepared zeolite as claimed in claim 1 and having a composition expressed on an anhydrous basis (in terms of mole ratios of oxide) by the formula: 100 XO₂ : less than or equal to 10 Y₂O₃ : less than or equal to 10 Q : less than or equal to 10 M₂O wherein Q is a polymethylene alpha, omega-diammonium cation having the formula: [(R₁R₂R₃) N (CH₂) m N (R₄R₅R₆)²⁺ where R₁, R₂, R₃, R₄, R₅ and R₆ are, independently of one another, C₁ to C₃ alkyl and m is in the range 7 to 14 and M is an alkali metal and/or ammonium.

Claim 6

A zeolite as claimed in claims 1 to 4 where X is silicon and Y is aluminium.

Claim 7

A zeolite as claimed in claim 1 in its hydrogen, ammonium or metal-containing forms.

Claim 8

A zeolite as claimed in claim 1, where R is or includes hydrogen, having a sorptive capacity for cyclohexane of at least 10% by weight at a relative pressure of 0.5.

Claim 9

A method for preparing zeolite NU-87 as defined in claim 1 which comprises reacting an aqueous mixture comprising a source of at least one oxide XO₂, where X is silicon and/or germanium, at least one nitrogen-containing organic cation Q, where Q is a polymethylene alpha, omega-diammonium cation having the formula: [(R₁R₂R₃) N (CH₂) m N (R₄R₅R₆)]²⁺ or a precursor thereof, where R₁, R₂, R₃, R₄, R₅ and R₆ are, independently of one another, C₁ to C₃ alkyl and m is within the range 7 to 14, optionally a source of at least one oxide Y₂O₃, where Y is one or more of aluminium, iron, gallium, boron, titanium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese, and optionally a source of monovalent cations, the mixture having the molar composition XO₂/Y₂O₃ at least 10 (R 1/n )OH/XO₂ in the range 0.01 to 2 H₂O/XO₂ in the range 1 to 500 Q/XO₂ in the range 0.005 to 1 L p Z/XO₂ in the range 0 to 5 where R is a cation of valency n which can include Q and/or M, where M is an alkali metal cation and/or ammonium, and Z is an anion of valency p and L is an alkali metal and/or an ammonium ion, and continuing the reaction until the product contains a major proportion of NU-87.

Claim 10

A method as claimed in claim 8 wherein the reaction mixture further comprises a seed material.

Claim 11

A method as claimed in claim 8 wherein Q is a polymethylene alpha, omega-diammonium cation having the formula: [(R₁R₂R₃) N (CH₂) m N (R₄R₅R₆)]²⁺ or a precursor thereof, where m is in the range 10 to 12 and the reaction mixture optionally comprises a seed material.

Claim 12

A method as claimed in claim 8 wherein Q is a polymethylene alpha, omega-diammonium cation having the formula: [(R₁R₂R₃) N (CH₂) m N(R₄R₅R₆)]²⁺ or a precursor thereof, where m is in the range 7 to 9 and the reaction mixture comprises a seed material.

Claim 13

A method as claimed in claim 8 wherein R₁, R₂, R₃, R₄, R₅ and R₆ are each methyl.

Claim 16

A process for separating an organic material from a solution comprising the organic material and water which comprises contacting the solution with zeolite NU-87.

Claim 17

A process for separating an organic material from a solution comprising the organic material and water which comprises contacting the solution with zeolite NU-87.