Method for removing organic acid from hydrocarbon oxidation liquid

Abstract

The present invention provides a method for removing organic acids from hydrocarbon oxidation liquid. The removal method comprises: step S1, washing the hydrocarbon oxidation liquid with primary water to obtain a primary organic phase and primary washing water; step S2, washing the primary organic phase with secondary water to obtain a secondary organic phase and secondary washing water; wherein the filter element materials used in the primary water washing and the secondary water washing each independently include oleophilic and hydrophobic nano-scale non-metallic fibers and / or oleophilic and hydrophobic metal materials. Compared with the method of removing organic acids from hydrocarbon oxidation liquid by alkaline washing, the above-mentioned method for removing organic acids avoids the problems of emulsification and phase separation difficulties caused by the introduction of sodium ions. At the same time, it avoids the process of multi-stage water washing to remove sodium ions, thereby reducing the investment cost of equipment and instruments; further, it avoids the consumption of alkali, reduces the amount of wastewater discharged, has lower costs, and better meets the requirements of industrial long-term operation.