The dehydration of succinic acid to succinic anhydride has been brought into the spotlight due to its environmental-friendly process. However, it is still an industrial challenge to enhance the dehydration performance under moderate reaction conditions. In this study, a series of acid-treated niobic acid catalysts were prepared for the dehydration of succinic acid to succinic anhydride. The textural properties and relative Lewis acid contents in samples could be affected by different liquid acid, thus resulting in the different catalytic activities. More interestingly, after the treatment of H₃PO₄, NbOPO₄ instead of Nb₂O₅·nH₂O could be formed. And H₂SO₄-treated niobic acid formed Nb₂O₄SO₄. Among these samples, H₃PO₄/Nb₂O₅·nH₂O exhibited the highest activity for the dehydration of succinic acid to succinic anhydride, which was attributed to the maximum specific surface area and moderate relative content of Lewis acid. Yields as high as 80% in the dehydration of succinic acid to succinic anhydride catalyzed by 5 wt% H₃PO₄/Nb₂O₅·nH₂O could be reached at 150 ℃ for only 5 h, which has greatly promoted the development of industrialization.

丁二酸脱水制丁二酸酐因其环保工艺而受到关注。然而，在中等反应条件下提高脱水性能仍然是一个工业挑战。在这项研究中，制备了一系列酸处理的铌酸催化剂，用于琥珀酸脱水制琥珀酸酐。样品中的质构性质和相对路易斯酸含量会受到不同液体酸的影响，从而导致不同的催化活性。更有趣的是，经过H ₃ PO ₄处理后，可以形成NbOPO ₄而不是Nb ₂ O ₅ ·nH _{2 O。}和 H ₂ SO_4-处理的铌酸形成Nb ₂ O ₄ SO ₄。在这些样品中，H ₃ PO ₄ /Nb ₂ O ₅ ·nH ₂ O表现出最高的琥珀酸脱水生成琥珀酸酐的活性，这归因于最大的比表面积和适度的路易斯酸相对含量。_{5 wt% H 3} PO ₄ /Nb ₂ O ₅ ·nH ₂ O催化的丁二酸脱水制丁二酸酐的收率高达80%，150 ℃仅需5 h，极大地促进了发展。的工业化。