Novel Working Solvent for the Production of Hydrogen Peroxide
journal contributionposted on 08.04.2019, 00:00 by Hongxin Bai, Xiangchen Fang, Chong Peng
Hydrogen peroxide is currently manufactured almost exclusively by the cyclic auto-oxidation (AO) process. It is important that the working solution meet the requirement for efficient operations for all steps involved in the cycle and that it chemically produces as great a yield as possible per pass through the cycle. Focusing on these requirements, organic heterocyclic bisamide solvent is proposed and systematically investigated in this work as one working solution component for industrial improvements. Specifically, N,N,N,N-tetrapropyl malonamide is selected as the novel working solution constituent for experimental investigation. From the foregoing experiments, the novel working solutions exhibits a favorable dissolving power for 2-alkylanthraquinones and their corresponding hydroquinone derivatives, great holdup ability for hydrogen, and more advantageous volumetric mass transfer coefficient brought by its physicochemical nature. In favor of these advantages, the kinetics apsect of 2-alkylanthraquinone is observed to be significantly improved. This is characterized by the apparent reaction rate constants, which are substantially in favor of the hydrogenation stage, and in the working compounds hydrogenation is always considered to be the key step for AO process. As a result, improvement in the hydrogenation efficiency of 2-alkylanthraquinone and the hydrogen peroxide yield per cycle are thus obtained in novel working solvents compared with the traditional ones.