| 摘要 |
Metallophosphates of formula (I) are new. M alpha y Al1-y P1-n Oa Nb Hc (I), where M = metal of oxidation state alpha selected from La, Ga, In, Zr, Si, Ge, W, Mo, Mn, Cr, Ti, Nb, V, Fe, B and Mg, preferably Ga, Cr, Zr or La; alpha = 2 to 6, preferably 3 to 4; a = 0 to 3-y(3- alpha )+5(1-n)+c/2, preferably not 0; b = 0 to 3-y(3- alpha )+5(1-n)+c/3; 0 < y <= 1; -2 <= n < 1; 0 < c <= 1; and 2a+3b = 8+( alpha -3)y-5n+c. Preparation of metallophosphates of formula (I) involves (i) reacting a metal M compound, optionally an aluminium compound and a phosphorus compound to obtain a nitrogen-free metallophosphate of formula (I) where b = 0; and optionally (ii) nitriding the metallophosphate to obtain a nitrogen-containing metallophosphate of formula (I) where b is not 0.
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