| abstract |
A dehydration catalyst useful for producing anmonoalkylether of dihydric phenolic compound by andehydration reaction of a dihydric phenolic compound withna lower alkyl alcohol with a high conversion at a highnselectivity, comprises at least one inorganic substancenof the empirical formula (I):n Al a P b Ti c Si d X e O f nwherein X represents a member selected from (1) annantimony and/or a bismuth atom, and (2) a sulfur atom, a,nb, c, d, e and f respectively represent the numbers ofnAl, P, Ti, Si, X and O atoms, the atomic ratio a:b isn1:1.0 to 1.9, the atomic ratio a:c is 1:0.05 to 0.5, thenatomic ratio a:d is 1:0.05 to 0.2, the atomic ratio a:enis 1:0.01 to 0.3 when X represents antimony and/ornbismuth atom and 1:0.004 to 0.015 when X represents ansulfur atom, and the atomic ratio a:f is 1:4.1 to 8.4. |