Integrated conversion and stepwise extraction of whole components in biomass with biphasic system are introduced for producing chemicals: levulinates and phenolics. When methanol/dimethoxymethane as biphasic solvent, 46.51% methyl levulinate and 18.78% phenolics were obtained with a conversion of 80.59 wt% per 4 g rice straw under the mild reaction conditions. Levulinates were collected with a 87.5 wt% high purity of methyl levulinate with stepwise precipitation and extraction from the cellulose and hemicellulose. The results of acid value, freezing point, induction period, kinematic viscosity, and flash point supposed that the extracted methyl levulinate could meet the requirements of fuel additives. Depolymerized lignin was consisted of many low-molecular phenolics. These results illustrated that the biphasic system can promote the conversion of cellulose and hemicellulose to the same product methyl levulinate through different intermediate transition compounds, and the catalyst can contribute to directly cleave the glycosidic bonds, β-O-4, and 4-O-5 with adequate protons.

介绍了利用双相系统对生物质中所有成分进行整体转化和逐步萃取的方法，以生产乙酰丙酸酯和酚醛化学品。当甲醇/二甲氧基甲烷作为双相溶剂时，在温和的反应条件下，获得了46.51％的乙酰丙酸甲酯和18.78％的酚类，每4 g稻草的转化率为80.59 wt％。收集具有87.5重量％高纯度的乙酰丙酸甲酯的白蛋白，逐步沉淀并从纤维素和半纤维素中提取。酸值，凝固点，诱导期，运动粘度和闪点的测定结果表明，所提取的乙酰丙酸甲酯可以满足燃料添加剂的要求。解聚的木质素由许多低分子酚组成。