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首页> 外文期刊>RSC Advances >Catalytic alcoholysis of alkaline extracted lignin for the production of aromatic esters over SO42?/ZrO2-ATP
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Catalytic alcoholysis of alkaline extracted lignin for the production of aromatic esters over SO42?/ZrO2-ATP

机译：碱性萃取木质素的催化醇解，用于在SO42？/ ZrO2-ATP上生产芳族酯

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An efficient process for the depolymerization of alkaline extracted lignin (AEL) using attapulgite (ATP)-supported solid catalysts in ethanol was developed in this work. Different ATP-supported catalysts were prepared and used to catalyze the depolymerization of the lignin AEL. The results demonstrated that the addition of ATP-supported catalysts was favorable for controlling the distribution of valuable depolymerization products. The optimal solid catalyst SO _(4) ~(2?) /ZrO _(2) -ATP (Cat 2) exhibited high catalytic activity and selectivity, which showed a 78.6% conversion of AEL and a 29.4% selectivity to ethyl ferulate (ethyl 4-hydroxy-3-methoxycinnamate) with a catalyst/AEL ratio of 1?:?1 at 200 °C for 120 min. The catalyst could be reused and its catalytic activity did not obviously decreased after 6 successive runs. Particularly, a plausible mechanism involving esterification, hydrogenation, and dehydration for the production of aromatic esters from AEL depolymerization over SO _(4) ~(2?) /ZrO _(2) -ATP in ethanol was also proposed.
机译：在这项工作中，开发了使用凹凸棒石（ATP）负载的固体催化剂在乙醇中解吸碱性提取木质素（AEL）的有效方法。制备了不同的ATP负载型催化剂，并用于催化木质素AEL的解聚。结果表明，添加ATP负载的催化剂有利于控制有价值的解聚产物的分布。最佳固体催化剂SO_（4）〜（2？）/ ZrO_（2）-ATP（Cat 2）表现出高催化活性和选择性，显示出AEL的转化率为78.6％，对阿魏酸乙酯的选择性为29.4％（ 4-羟基-3-甲氧基肉桂酸乙酯）在200℃下120℃的催化剂/ AEL比为1：∶1。连续使用6次后，该催化剂可重复使用，催化活性没有明显降低。特别地，还提出了在乙醇中SO_（4）〜（2′）/ ZrO_（2）-ATP上由AEL解聚产生芳族酯的可能的酯化，氢化和脱水机理。

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