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首页> 外文期刊>Catalysis science & technology >Efficient C-C coupling of bio-based furanics and carbonyl compounds to liquid hydrocarbon precursors over lignosulfonate derived acidic carbocatalysts
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Efficient C-C coupling of bio-based furanics and carbonyl compounds to liquid hydrocarbon precursors over lignosulfonate derived acidic carbocatalysts

机译：有效的生物furanics和碳碳偶联羰基化合物液态烃前体对木质素磺酸盐酸性派生而来carbocatalysts

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摘要

This paper demonstrates the catalytic potential of novel Na-lignosulfonate (LS) derived meso/macroporous solid protonic acids upon C-C coupling of bio-based furanics and carbonyl compounds. The materials demonstrated catalytic activity for solventless hydroxyalkylation/alkylation (HAA) of 2-methylfuran with furfural, acetone, butanal, cyclohexanone, levulinic acid and -angelica lactone under mild reaction conditions (50-60 degrees C) producing branched-chain C12-C16 hydrocarbon precursors in yields approaching 96%. Moreover, the carbon materials exhibiting high total acidity (6-6.4 mmol g(-1)) outperformed sulfonic acid resins (Amberlyst (R) 70, Amberlite (R) IR120 and LS resin), zeolites and liquid acids (p-toluenesulfonic acid, acetic acid and phenol). In fact, the most active carbocatalyst (60LS40PS350H(+)) exhibited the same turnover frequency as p-toluenesulfonic acid (186 h(-1)) upon furfural conversion but with an improved HAA product yield (up to 88%) and reusability, maintaining 98% of its original activity up to seven reaction cycles. The observed catalytic activity and operational stability of the LS derived acidic carbocatalysts were attributed to the strongly BrOnsted acidic -SO3H groups covalently incorporated into their structural carbon framework and the promotional effects of hydrophilic surface functional groups (-COOH and -OH) favoring adsorption of oxygenated reactant molecules.
机译：本文论述了催化的潜力小说Na-lignosulfonate (LS)内消旋/大孔碳碳固体质子的酸耦合的生物furanics和羰基化合物。活动不溶解的hydroxyalkylation /烷基化(HAA)2-methylfuran与糠醛丙酮、正丁醛环己酮、乙酰丙酸和当归内酯在温和的反应条件下(50 - 60生产支链C12-C16摄氏度)碳氢化合物的前体收益率接近96%。此外,碳材料表现出高总酸度(6 - 6.4更易与g(1))的表现磺酸树脂(Amberlyst (R) 70年,安伯来特(R) IR120和LS树脂)、沸石和液体酸(p-toluenesulfonic酸、醋酸和苯酚)。(60 ls40ps350h(+))表现出相同的营业额频率p-toluenesulfonic酸(186 h (1))但随着改进HAA在糠醛转换产品收益率(88%)和可重用性,保持原来的活动的98%七反应周期。LS的活动和操作稳定派生的酸性carbocatalysts归因于强酸性布仑斯惕-SO3H组共价纳入他们的结构碳框架和促销的影响亲水基团(羧基和表面-哦)有利于吸附氧的反应物分子。

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