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1. (WO1998050307) ACTINIDE-CONTAINING MOLECULAR SIEVES

Pub. No.:    WO/1998/050307    International Application No.:    PCT/GB1998/001275
Publication Date: Fri Nov 13 00:59:59 CET 1998 International Filing Date: Fri May 01 01:59:59 CEST 1998
IPC: B01J 20/02
B01J 23/12
B01J 29/00
B01J 29/03
B01J 29/04
B01J 29/82
B01J 39/08
B01J 39/12
C01B 37/00
Applicants: BRITISH NUCLEAR FUELS PLC
LEE, Darren, Frank
O'HARE, Dermot
FRANCIS, Robin
Inventors: LEE, Darren, Frank
O'HARE, Dermot
FRANCIS, Robin
Title: ACTINIDE-CONTAINING MOLECULAR SIEVES
Abstract:
Molecular sieves (often loosely termed microporous materials) contain an actinide in combination with atoms selected from the group consisting of oxygen, fluorine, phosphorus, transition metals and mixtures thereof. The molecular sieve material may contain a template species, which suitably comprises an organic template molecule and/or a cationic metal species; it may also contain water. Additionally, it may contain a dopant, usually in a minor amount; suitable dopants include transition metals to modify the catalytic properties of the materials. Preferred molecular sieves comprise layered structures in which layers containing actinide in combination with atoms selected from the group consisting of oxygen, fluorine, phosphorus, transition metals and mixtures thereof have organic templates and/or cationic metal species located between them. In one class of materials, the layers contain an oxoanion (preferably a phosphate, notably orthophosphate, or a transition metal oxoanion); in this class, the actinide may usually be represented as an oxo ion, expecially an oxocation. In another class of materials, the layers contain actinide and fluorine. Exemplary materials have U/P/O or U/F frameworks.