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首页> 外文期刊>Catalysis science & technology >Selective hydrodeoxygenation of tartaric acid to succinic acid
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Selective hydrodeoxygenation of tartaric acid to succinic acid

机译：选择性hydrodeoxygenation酒石酸琥珀酸

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摘要

A novel one-step process for catalytic production of succinic acid from tartaric acid, which is largely available in the waste streams of wine making, is developed. A liquid-phase system comprised of a molybdenum oxide catalyst supported on carbon black (MoOx/BC) and hydrobromic acid in acetic acid under a H-2 atmosphere is effective for selective cleavage of the C-O bonds of tartaric acid and selective hydrogenation of the resulting unsaturated carbons. Temperature, hydrogen pressure, and catalyst pre-treatment are optimized to understand their impact on catalytic activity and product distribution, leading to an 87% yield of succinic acid at 170 degrees C. Importantly, reduction of the carboxyl groups and C-C bond cleavage are retarded. Pre-reduction and characterization studies (TPR, XRD, XPS, and XAS) reveal that the high catalyst activity of MoOx/BC is correlated with the lower Mo oxidation states (+4 to 0) formed during pre-reduction that promote cleavage of the C-O bonds of tartaric acid and hydrogenation of the C=C bond of the intermediate fumaric acid. Recyclability studies and structural characterization of the recovered catalyst indicate that MoOx/BC remains active upon reuse.
机译：小说一步催化生产过程琥珀酸的酒石酸,在很大程度上可以在葡萄酒的废物流制造、开发。由氧化钼催化剂支持炭黑(公元前MoOx /)氢溴酸乙酸2下大气是有效的选择性的乳沟酒石酸和选择性的切断债券加氢生成不饱和碳原子。催化剂预处理进行了优化了解他们对催化活性的影响产品销售,导致收益率为87%琥珀酸在170度c。重要的是,减少的羧基组和碳碳键解理是弱智。特性研究(TPR、XRD、XPS和xa)显示,催化剂活性高MoOx / BC与低钼氧化态(+ 4 0) pre-reduction期间形成的促进酒石的乳沟切断债券酸和加氢的C = C键中间反丁烯二酸。和结构特征的恢复催化剂表明MoOx /公元前仍然活跃在重用。

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