Application of tungsten-based catalyst in lignin catalytic hydrogenation for producing aromatic compound

钨基催化剂在木质素催化加氢制芳香族化合物中的应用

Abstract

本发明涉及木质素的加氢裂解,具体地说是一种钨基催化剂催化木质素加氢裂解制备芳香族化合物的方法;该方法所使用的催化剂以非零价钨为主要活性组分,以零价镍、钴、钌、铱、钯、铂、铁、铜等其中一种或几种少量过渡金属为第二金属组分。该方法以天然木质素、生物质水解残渣、木质素磺酸盐、碱木质素等为原料在120-450oC,氢气压力1-20MPa的水热条件下催化加氢,高选择性裂解为C6-C9的酚类化合物,酚产率最高达55.6%。与现有方法相比,本发明能使用可再生天然生物质为原料,原料廉价且来源广泛;无需使用无机酸、碱,避免了传统木质素催化大量碱液的产生;还具有钨基催化剂廉价、反应过程绿色、原子经济性等特征。
The invention relates to hydrocracking of lignin, and specifically relates to a method for applying a tungsten-based catalyst to catalyze lignin hydrocracking for producing an aromatic compound. The catalyst comprises a main active component of non-zero-valent tungsten, and a second metal component of a small amount of one or more transition metals selected from zero-valent nickel, cobalt, ruthenium, iridium, palladium, platinum, iron, and copper. According to the method, raw materials such as lignin, biomass hydrolysis residue, lignosulfonate, and alkaline lignin are subject to catalytic hydrogenation under a hydrothermal condition with a temperature of 120 to 450 DEG C and a hydrogen pressure of 1 to 20MPa; the raw materials are cracked into C6-C9 phenolic compounds with high selectivity. A maximal phenol yield reaches 55.6%. Compared to existing technologies, according to the invention, renewable natural biomasses are adopted as raw materials, such that the raw materials are cheap, and have wide sources; inorganic acid and alkali are not required, such the production of a large amount of alkaline solution in traditional lignin catalysis is avoided; the tungsten-based catalyst is cheap; the reaction process is green, and has atom economical characteristics.

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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    CN-101768052-AJuly 07, 2010中国科学院大连化学物理研究所一种木质素催化加氢裂解制备芳香族化合物的方法

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