| 摘要 |
<p>A synthetic zeolite material, designated zeolite Nu-4, having a molar composition expressed by the formula: 0.1 to 7.5 M1_2O:0.2 to 2.5 Y2O3:100 XO2:0 to 50 H2O wherein M<1> is a monovalent cation or 1/n of a cation of valency n, X is silicon or germanium, Y is aluminium, iron, chromium, vanadium, molybdenum, arsenic, antimony, manganese, gallium, or boron, and H2O is water of hydration additional to water notionally present when M<1> is H and having a defined X-ray pattern is prepared from defined aqueous mixtures containing the oxide XO2, the oxide Y2O3 and a polyalkylene polyamine. The zeolite is a useful catalyst for xylenes isomerisation and the like.</p> |
