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SODIUM ORTHOHYDROXYMANDELATE/PHENOL/WATER COMPLEX, ITS PRODUCTION AND ITS USE FOR SEPARATION OF SODIUM ORTHOHYDROXYMANDELATE
SODIUM ORTHOHYDROXYMANDELATE/PHENOL/WATER COMPLEX, ITS PRODUCTION AND ITS USE FOR SEPARATION OF SODIUM ORTHOHYDROXYMANDELATE
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机译:羟基苯甲酸钠/苯酚/水配合物,其生产及其用于分离羟基苯甲酸钠的用途
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摘要
PROBLEM TO BE SOLVED: To obtain a high-purity crystallized sodium o-hydroxymandelate-phenol- water complex by reacting glyoxylic acid with phenol. ;SOLUTION: This complex is expressed by the formula ((n) and (m) are each 0.8-1.2). The complex can be produced by reacting glyoxylic acid with phenol in the presence of a t-amine and a trivalent cation, treating the reaction product with a solution of an alkaline hydroxide and introducing phenol into the obtained aqueous solution of pH7-9. The aqueous solution preferably contains sodium o- or p-hydroxymandelate, etc.;COPYRIGHT: (C)1997,JPO
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