Microwave Assisted Depolymerization of Alkaline Lignin over Hydrotalcite-Based CuNiAl Mixed Oxides was written by Zhou, Minghao;Sharma, Brajendra K.;Liu, Peng;Xia, Haihong;Xu, Junming;Jiang, Jian-chun. And the article was included in ACS Sustainable Chemistry & Engineering in 2018.Synthetic Route of C9H12O3 The following contents are mentioned in the article:
In this study, microwave assisted depolymerization of alk. lignin into bio-oil was investigated in the presence of CuNiAl hydrotalcite based solid base catalysts in methanol. The effects of catalysts, reaction temperature, time, and heating methods were all studied in detail to improve the bio-oil yield. The promotion effect of microwave heating and Cu amount in the CuNiAl based catalysts was obviously observed during degradation of lignin, leading to improved bio-oil yield and lower mol. weight The highest yield of bio-oil was up to 60.1%, when the depolymerization was conducted at 160 °C for 80 min over CuNiAl based catalyst (metal ratio of 1.5:4.5:2). The monomers and oligomers were identified by GC-MS and MALDI-TOF MS, finding p-hydroxyacetophenone (H2), guaiacol (G1), p-hydroxyacetovanillon (G5), and syringaldehyde (S3) as the main monophenols in bio-oil. The possible chem. structures for oligomers with mol. weight of 288 m/z, 306 m/z, 316 m/z, 330 m/z, 412 m/z, 426 m/z, and 456 m/z were obtained, and plausible depolymerization pathways were proposed in order to facilitate the understanding of possible relationship for the formation of prominent oligomers and monomers. This study confirmed that heterogeneous base catalysts coupled with microwave heating could provide a promising technique to convert lignin to liquid fuels. This study involved multiple reactions and reactants, such as 4-Hydroxy-3-methoxyphenethanol (cas: 2380-78-1Synthetic Route of C9H12O3).
4-Hydroxy-3-methoxyphenethanol (cas: 2380-78-1) belongs to ethers. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Synthetic Route of C9H12O3
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem