School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou 510640, China; State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Bioresour Technol. 2016 Oct;218:718-22. doi: 10.1016/j.biortech.2016.07.021. Epub 2016 Jul 9.
A new two-step lignin depolymerization strategy was developed, in which the benzylic alcohols in lignin was methylated under microwave irradiation, followed by a hydrogenolysis for the cleavage of βO4 bond with Pd/C as the catalyst. The results showed that an efficient and selective catalytic methylation of benzylic alcohols was achieved with various lignin model compounds, and the acidic environment promoted the methylation of benzylic alcohol. Methylation of benzylic alcohol increased the βO4 bond cleavage rate by 55.9%, and improved products selectivity. Preliminary study of lignin depolymerization illustrated that methylation pretreatment of benzylic alcohols facilitated lignin depolymerization to produce aromatic monomers and reduced the oxygen content of aromatic monomers.
开发了一种新的两步木质素解聚策略，在该策略中，木质素中的苄醇在微波辐射下进行甲基化，然后用 Pd/C 作为催化剂进行氢解以断裂βO4 键。结果表明，各种木质素模型化合物都实现了高效和选择性的苄醇催化甲基化，酸性环境促进了苄醇的甲基化。苄醇的甲基化将βO4 键断裂速率提高了 55.9%，并提高了产物的选择性。木质素解聚的初步研究表明，苄醇的甲基化预处理有利于木质素解聚生成芳香单体，并降低了芳香单体的含氧量。
