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    • 8. 发明申请
    • CATALYTIC CONVERSION OF LIGNOCELLULOSIC BIOMASS INTO INDUSTRIAL BIOCHEMICALS
    • 木质纤维素生物质催化转化工业生物化学
    • WO2017161452A1
    • 2017-09-28
    • PCT/CA2017/050361
    • 2017-03-22
    • LE VAN MAO, Raymond
    • LE VAN MAO, Raymond
    • C07C67/02C07C31/04C07C51/285C07C51/31C07C53/02C07C53/08C07C59/185C07C69/06C07C69/14C07C69/40C07C69/716C07D307/48C07D307/50
    • This invention relates to a method for the conversion of lignocellulosic biomass into ethyl esters of carboxylic acids. Said method consists of treating the biomass material with an oxidizing agent that is incorporated in an solution comprising one or more acids, one or more alcohols and water, and subsequently performing a catalytic reaction at a higher temperature using the same acidic solution into which a larger volume of alcohol is added, in such a way that the catalytic conversion occurs in a medium with a much higher concentration of alcohol, i.e. with a much higher alcohol-to-water wt ratio. Such a method results in relatively high yields of ethyl esters, such as ethyl esters of formic, acetic, and levulinic acids, while producing a low yield of dialkyl ethers, which are unwanted by-products. The concentration of the oxidizing agent in the pre-treatment step is preferably higher than 6.0 wt %. The oxidizing agent is preferably a Fenton or Fenton-type reagent, and most preferably hydrogen peroxide activated by Fe (II), and/or Ti (IV) ions. The alcohol is preferably ethanol, and when ethanol is used, diethyl ether is formed as the unwanted dialkyl ether by-product. Preferably, the biomass material is pelleted before treatment.
    • 本发明涉及将木质纤维素生物质转化成羧酸乙酯的方法。 所述方法包括用掺入包含一种或多种酸,一种或多种醇和水的溶液中的氧化剂处理生物质材料,随后使用相同的酸性溶液在较高温度下进行催化反应,其中较大的 加入一定体积的醇,使得催化转化在具有高得多的醇浓度的介质中发生,即具有高得多的醇 - 水重量比。 这种方法导致相对高收率的乙酯,例如甲酸,乙酸和乙酰丙酸的乙酯,同时产生低产率的二烷基醚,其是不需要的副产物。 预处理步骤中氧化剂的浓度优选高于6.0重量%。 氧化剂优选为芬顿或芬顿型试剂,最优选由Fe(II)和/或Ti(IV)离子活化的过氧化氢。 醇优选为乙醇,并且当使用乙醇时,二乙醚形成不需要的二烷基醚副产物。 优选地,生物质材料在处理之前被沉淀。