Abstract

This article describes the production of unsupported nickel phosphide catalysts generated in situ in а reaction mixture from water-soluble and oil-soluble precursors during the hydroconversion of levulinic acid. These catalysts contain crystalline phases, specifically Ni₁₂P₅ and Ni(PO₃)₂. During the hydrogenation of levulinic acid in toluene in the presence of NiP–TOP, a lower temperature and a shorter reaction time contribute to the formation of γ-valerolactone (100% selectivity). A higher temperature and a longer reaction time favor the formation of valeric acid (94% selectivity). In the hydrogenation of levulinic acid in ethanol in the presence of NiP–H₃PO₂, the main reaction product is ethyl levulinate (95% selectivity).

中文翻译：

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原位生成的磷化镍基催化剂用于乙酰丙酸的加氢处理

摘要

本文介绍了在乙酰丙酸加氢转化过程中，由水溶性和油溶性前体在反应混合物中原位生成无载体磷化镍催化剂的方法。这些催化剂包含结晶相，特别是Ni ₁₂ P ₅和Ni（PO ₃）₂。NiP–TOP存在下乙酰丙酸在甲苯中的氢化过程中，较低的温度和较短的反应时间有助于形成γ-戊内酯（100％的选择性）。较高的温度和较长的反应时间有利于戊酸的形成（94％的选择性）。NiP–H ₃ PO ₂存在下乙醇中乙酰丙酸的加氢反应，主要反应产物是乙酰丙酸乙酯（选择性95％）。