| abstract |
A synthetic zeolite material, designated zeolite FU9, having a molar composition expressed by the formula 0.5 to 1.5 R 2 0 : Y 2 O 3 : 15 to 30 X0 2 : 0 to 500 H 2 0, in which 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 aluminium, iron, chromium, vanadium, molybdenum, arsenic, manganese, gallium or boron, and H 2 O is water of hydration additional to water notionally present when R is H, and having an X-ray diffraction pattern, the most significant lines of which are zeolite FU9 being a useful catalyst for xylenes isomerisation and the like. n The zeolite is prepared starting from an aqueous reaction mixture containing at least one tetramethyl ammonium compound (TMA). Molar composition: XO 2 /Y 2 O 3 = 5-50 free MO 2 /XO 2 = 0.1-10 Z - /Y 2 O 3 = 0-5000 O/Y 2 O 3 = 01-150 H 2 0/X0 2 = 5-20Q, in which X and Y have the above-mentioned meanings, M is an alkali metal or ammonium, Z - is a strong acid radical and Q = (TMA) 2 + xA in which A is a trialkyl amine or alkanol amine or salt thereof and x is 0,2 to 2,0 moles. |