prov:value
| - Any zeolite may be used in the present invention, for example those having LTA, MEL, MFI or TON structure types as defined in Atlas of Zeolite Structure Types", Meier and Olsen, 1987, Polycrystal Book Service, Pittsburg USA. Other zeo-type materials which may be used include metallosilicates in which some or all of the aluminium is replaced by another metal, such as gallium, boron, zinc, iron or
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