Compositions which inhibit corrosion and alter the physical properties of concrete (admixtures) are prepared from salt mixtures of hydroxycarboxylic acids, carboxylic acids, and nitric acid. The salt mixtures are prepared by neutralizing acid product mixtures from the oxidation of polyols using nitric acid and oxygen as the oxidizing agents. Nitric acid is removed from the hydroxycarboxylic acids by evaporation and diffusion dialysis.
抑制腐蚀并改变混凝土物理性质的化合物(外加剂)是由羟基
羧酸盐混合物,
羧酸和
硝酸制备而成。盐混合物是通过用
硝酸和
氧气作为氧化剂氧化多元醇产物混合物并中和而制备的。通过蒸发和扩散透析从羟基
羧酸中去除
硝酸。