Salen-Al/季铵盐催化体系催化生物基原料制备大豆油环碳酸酯研究

Synthesis of Carbonated Soybean Oil from bio-based feedstock in Salen-Al/Quaternary Ammonium Salt Binary Catalyst System

摘要:

合成制备了四种不同希夫碱金属配合（Salen-Al），利用红外（IR），紫外（UV），核磁（1H-NMR），元素分析（EA），离子含量（ICP）等对其表征。筛选催化活性较高的Salen-Al与季铵盐进行复配形成二元催化体系，催化环氧大豆油和CO2合成制备大豆油环碳酸酯。利用IR，1H-NMR对产物进行表征分析。同时考察了二元催化体系下环氧大豆油与CO2合成大豆油环碳酸酯的反应温度，压力，复配比等因素，研究表明在温度为120℃，压力2MPa，Salen-Al与季铵盐摩尔比1:1时有较高的催化效率，反应8h转化率高达76.8%，对比单组份催化时有明显的提高。

Abstract:

In this paper, four different Salen-Al was prepared, The structures of Salen-Al have been investigated using different characterization techniques such as IR, UV, 1H-NMR, EA and ICP, chose one of the four Salen-Al which had the highest catalytic activity, and compounded with quaternary ammonium salt to form the binary catalyst system. Carbonated soybean oil was prepared by the reaction of epoxidized soybean oil and carbon dioxide, and characterized by IR, 1H-NMR. While the reaction pressure, composite ratio were examined. Studies had shown that binary catalytic system in the temperature of 120 ℃, pressure at 2 MPa, Salen-Al and quaternary ammonium salt composite ratio at 1:1 had high catalytic efficiency, reaction time at 8h the conversion was as high as 76.8%, compared with using single catalyst the catalytic efficiency had improved significantly.