Patent ID: 10508070

Abstract:
The instant disclosure discloses a method for preparing 3-hydroxybutyrate salts, which includes: (1) providing ethyl 3-hydroxybutyrate or methyl 3-hydroxybutyrate, and hydrolyzing through a basic catalyst to obtain 3-hydroxybutyric acid; (2) making 3-hydroxybutyric acid reacted with an inorganic base to give 3-hydroxybutyrate. The instant disclosure adopts salt formation in water to make the reaction proceed more thoroughly, and also to save reaction time, to reduce energy consumption and material loss, to improve product yield and to lower production cost. The concentration process of the roughing (i.e. crude preparation) of 3-hydroxybutyrate is omitted. During the series of processes of refining and concentrating 3-hydroxybutyrate with anhydrous ethanol, performing crystallization with adding acetone, filtering, washing and drying, the use of acetone as an organic solvent is decreased, material loss and energy consumption of the corresponding process is saved, production costs of 3-hydroxybutyrate is reduced as well. The heating processes of roughing and refining 3-hydroxybutyrate is decreased. The salt formation in water also avoids the problem that the produced 3-hydroxybutyrate is easy to absorb moisture, and the quality of the 3-hydroxybutyric acid salt is ensured.