Methods for catalytically dehydrating hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propionic acid, and acetic acid, are provided. The catalysts are mixed condensed phosphates.
提供了一种将羟基
丙酸、羟基
丙酸衍
生物或二者混合物催化脱
水制备
丙烯酸、
丙烯酸衍
生物或二者的方法,具有高产率和选择性,并且不会显著转化为不希望的副产物,如
乙醛、
丙酸和
乙酸,催化剂为混合凝缩
磷酸盐。