| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing 2,3,4,4'-tetrahydroxybenzophenone useful as an intermediate for dyes, polymers, ultraviolet absorbers, stabilizers for synthetic resins, agrochemicals, pharmaceuticals, photosensitive materials for photoresist, etc., with a simple process on an industrial scale at a low cost. SOLUTION: 2,3,4,4'-Tetrahydroxybenzophenone is produced by reacting p-hydroxybenzoic acid with pyrogallol in the presence of an inorganic solid acid catalyst such as silica alumina. COPYRIGHT: (C)2003,JPO
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