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首页> 外文期刊>RSC Advances >Phosphoric acid doped polybenzimidazole as an?heterogeneous catalyst for selective and efficient dehydration of saccharides to 5-hydroxymethylfurfural
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Phosphoric acid doped polybenzimidazole as an?heterogeneous catalyst for selective and efficient dehydration of saccharides to 5-hydroxymethylfurfural

机译：磷酸掺杂聚苯和咪唑作为α非均相催化剂，用于糖的选择性和有效脱水至5-羟甲基糠醛

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5-Hydroxymethylfurfural (HMF) is considered as a valuable platform chemical for fuels and chemical intermediates. Tremendous efforts have been made on the development of catalysts for the dehydration of saccharides to HMF with high conversion and selectivity. Here we reported a new solid acid, phosphoric acid doped polybenzimidazole (PA–PBI), for the dehydration of fructose to HMF with high selectivity (～94%) at high fructose concentration (50 wt%) in a water–methyl isobutyl ketone (MIBK) biphasic system. PA–PBI was directly obtained by the one-pot polycondensation reaction and was very stable under harsh reaction conditions due to the strong acid–base interaction between PA and imidazole in PBI. PA–PBI was recycled to catalyze the dehydration of fructose four times without the loss of activity and could also catalyze a variety of disaccharides and polysaccharides to produce HMF. The high selectivity and the ease of recycling make PA–PBI a superior catalyst for the dehydration of saccharides to HMF.
机译：5-羟甲基糠醛（HMF）被认为是燃料和化学中间体的有价值的平台化学品。对具有高转化性和选择性的HMF的糖化催化剂的催化剂的发展进行了巨大的努力。在这里，我们报道了一种新的固体酸，磷酸掺杂的聚苯苯胺咪唑（PA-PBI），用于在水 - 甲基异丁基酮的高果糖浓度（50wt％）下具有高选择性（〜94％）的果糖至HMF的脱水（ MIBK）双相系统。 PA-PBI通过单罐缩聚反应直接获得，并且由于PBI中PA和咪唑之间的强酸碱相互作用而在恶劣的反应条件下非常稳定。 PA-PBI再循环以催化果糖的脱水四次而不会丧失活性，并且还可以催化各种二糖和多糖以产生HMF。选择性高选择性和再循环使PA-PBI成为糖醇的优异催化剂，以使糖化为HMF。

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