Abstract Present work is focused on development of methodology involving utilization of cost effective, highly effective heterogeneous catalyst prepared from wood ash for carbonyl exchange reaction between long chain alcohols and diethyl carbonate to produce long-chain dialkyl carbonates. Whereas long-chain dialkyl carbonates are being explored as value added compounds as they are environmentally safe and non-corrosive in nature and useful in diesel as cetane improvers, lubricants and used in cosmetics. Thermal treatment (calcination) of wood ash was carried out at 500 and 800 °C temperatures and studied the activity of resulted catalyst towards the synthesis of long-chain dialkyl carbonates through carbonyl exchange reaction. The prepared catalyst was characterized by analytical techniques for surface morphology, crystalline phases and textural characteristics. In the present study, maximum yield of long-chain dialkyl carbonates (81%) was achieved using heterogeneous wood ash catalyst at 10 wt% of reactants and at temperature of 120 °C. The synthesized products were characterized by analytical techniques like infrared (IR), nuclear magnetic resonance (NMR), gas chromatography and mass spectroscopy respectively. Applications of prepared long-chain dialkyl carbonates in ultra low sulphur diesel (ULSD) have been explored as lubricity improvers and cetane number improvers. Graphic Abstract

中文翻译：

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羰基交换反应灰分催化合成长链碳酸二烷基酯

摘要 目前的工作重点是开发方法，该方法涉及利用由木灰制备的具有成本效益的高效多相催化剂，用于长链醇和碳酸二乙酯之间的羰基交换反应，以生产长链碳酸二烷基酯。而长链碳酸二烷基酯正在探索作为增值化合物，因为它们对环境安全且性质无腐蚀性，并且在柴油中用作十六烷值改进剂、润滑剂和用于化妆品。木灰的热处理（煅烧）在 500 和 800 °C 的温度下进行，并研究了所得催化剂对通过羰基交换反应合成长链碳酸二烷基酯的活性。制备的催化剂通过表面形貌分析技术表征，晶相和结构特征。在本研究中，长链碳酸二烷基酯的最大产率 (81%) 是使用多相木灰催化剂在 10 wt% 的反应物和 120 °C 的温度下实现的。合成产物分别通过红外（IR）、核磁共振（NMR）、气相色谱和质谱等分析技术进行表征。制备的长链碳酸二烷基酯在超低硫柴油 (ULSD) 中的应用已被探索作为润滑性改进剂和十六烷值改进剂。图形摘要 合成产物分别通过红外（IR）、核磁共振（NMR）、气相色谱和质谱等分析技术进行表征。制备的长链碳酸二烷基酯在超低硫柴油 (ULSD) 中的应用已被探索作为润滑性改进剂和十六烷值改进剂。图形摘要 合成产物分别通过红外（IR）、核磁共振（NMR）、气相色谱和质谱等分析技术进行表征。制备的长链碳酸二烷基酯在超低硫柴油 (ULSD) 中的应用已被探索作为润滑性改进剂和十六烷值改进剂。图形摘要