Chemical Engineering Department, Sarvajanik College of Engineering and Technology, Surat, 395001, India.
Department of Chemical Engineering, S.V. National Institute of Technology, Surat, 395007, India.
Environ Sci Pollut Res Int. 2023 Jun;30(28):71472-71481. doi: 10.1007/s11356-022-22807-1. Epub 2022 Sep 10.
Esters of butanedioic acid (succinic acid) are appealing renewable esters as fuel additives and solvents. In the present study, we have investigated reaction routes for the esterification of succinic acid (SA) with alcohols like methanol (MeOH), ethanol (EtOH), and 2-propanol (2-PrOH) using heterogeneous catalyst D-Hβ (moderate Bronsted acidity) in a microwave (MW)-irradiated reactor to increase yield and minimize waste generation. Using the Box-Behnken design (BBD) approach, operating parameters such as reaction time, microwave power, and catalyst dosing were optimized for SA esterification with MeOH. At optimum conditions using D-Hβ catalyst, 99% maximum conversion was achieved with 98% selectivity of dimethyl succinate (DMS). At optimum conditions, the esterification of SA with EtOH and 2-PrOH was also performed. The use of D-Hβ is economically more advantageous as it can be reused directly without any prior washing and also showed significant activity.
丁二酸（琥珀酸）的酯是很有吸引力的可再生酯类，可用作燃料添加剂和溶剂。在本研究中，我们使用非均相催化剂 D-Hβ（中等强度的布朗斯台德酸性），在微波（MW）辐照反应器中，研究了丁二酸（SA）与甲醇（MeOH）、乙醇（EtOH）和 2-丙醇（2-PrOH）等醇类酯化的反应途径，以提高产率并尽量减少废物生成。采用 Box-Behnken 设计（BBD）方法，对反应时间、微波功率和催化剂剂量等操作参数进行了优化，用于 SA 与 MeOH 的酯化反应。在使用 D-Hβ催化剂的最佳条件下，可达到 99%的最大转化率和 98%的二甲基琥珀酸二甲酯（DMS）选择性。在最佳条件下，还进行了 SA 与 EtOH 和 2-PrOH 的酯化反应。D-Hβ的使用在经济上更有利，因为它可以直接重复使用，无需事先洗涤，并且表现出显著的活性。
