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对羟基苯甲酸是白色结晶状固体,它是用途广泛的有机合成原料,其下游产品被广泛地应用于农药工业中。对羟基苯甲酸的生产方法有多种,如可用水杨酸经成盐、转位、中和得到对羟基苯甲酸;苯酚钾羧化法较适合工业化生产,该法又分为固相法、溶剂法、连续液相法,国内主要采用固相法,日本上野公司采用先进的连续液相法,但对设备、控制等要求
Para-hydroxybenzoic acid is a white, crystalline solid that is a versatile organic synthesis feedstock whose downstream products are widely used in the pesticide industry. There are many ways to produce p-hydroxybenzoic acid. For example salicylic acid can be salified, translocated and neutralized to obtain p-hydroxybenzoic acid. The potassium carboxylate method is more suitable for industrialized production. The method is divided into solid phase method, Solvent method, continuous liquid phase method, the domestic main use of solid-phase method, the Japanese company Ueno advanced liquid phase method, but the equipment, control and other requirements