Wang, Jiangli published the artcileIn-Depth Identification of Phenolics Fractionated from Eucalyptus Kraft Lignin, Quality Control of 134-96-3, the publication is Advanced Sustainable Systems (2022), 6(5), 2100406, database is CAplus.
Kraft lignin, the principal byproduct of the pulping industry, is an abundant yet highly underutilized aromatic resource. It is useful due to the vast scales involved as a source of fuels, chems., and functional materials when suitable postprocessing is applied. It is deemed to be a renewable alternative to fossil sources. Because of the extreme complexity of kraft lignin, in-depth composition anal. and chem. structural identification are crucial for the development of effective valorization strategies. This work embarks on the characterization and identification of lignin-derived phenolic compounds in representative hardwood (Eucalyptus) kraft lignin after selective fractionation using a single solvent. Advanced 2D heteronuclear single quantum coherence (HSQC) NMR, 31P NMR, and mass spectrometry in combination with synthetic authentic compounds are used for the structural identification of the low-mol.-weight fraction of kraft lignin. A total of 20 phenolic compounds, including several novel monomers (catechols), dimers (diarylethanes, diarylethenes, etc.), and trimers with tri-Ph structures are systematically identified in the Eucalyptus kraft lignin. In addition, polysulfide is detected in the low-mol.-weight fraction, indicating that the oxidative polymerization of S2-/HS– occurrs during the kraft pulping process. An improved understanding of kraft lignin, especially the low-Mw fraction, is expected to provide essential information for the selective fractionation and valorization of lignin.
Advanced Sustainable Systems published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H22OSi, Quality Control of 134-96-3.
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https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem