Feng, Chengqi published the artcileAcidolysis mechanism of lignin from bagasse during p-toluenesulfonic acid treatment, SDS of cas: 134-96-3, the publication is Industrial Crops and Products (2022), 114374, database is CAplus.
Lignin was efficiently separated from lignocellulosic biomass using p-toluenesulfonic acid (p-TsOH) treatment. However, lignin depolymerization and acidolysis have not been studied to date. In this study, the mechanism of lignin acidolysis was investigated. The structure of lignin in bagasse before and after the p-TsOH treatment was analyzed. The efficiency and selectivity of lignin depolymerization were evaluated. The lignin removal rate reached 88.81%. Hemicellulose was completely removed from lignin, and cellulose destruction was inhibited. The structure of lignin in bagasse was analyzed using NMR. The results revealed that α-methoxylated β-O-4 intermediates were formed during lignin depolymerization This indicated that the benzyl ether bonds were effectively catalyzed and broke, thereby promoting lignin dissolution The lignin-carbohydrate complex structure was destroyed. The insoluble and soluble lignin in the hydrolyzate were analyzed using NMR and gas chromatog.-mass spectrometry. The results indicated that the catalyst promoted breaking of the Cβ-O bonds in the β-O-4 structures. Phenols and Hibbert ketones were formed. In addition, lignin sulfonation was confirmed by the presence of di-o-tolusulfone and di-p-tolusulfone. The low contents of β-β and β-5 bonds in the reaction products indicated that lignin condensation was inhibited. The results demonstrated that lignin acidolysis was synergistically catalyzed by H+ and p-TsOH. It provides important theor. support for efficient and clean separation of lignin using the p-TsOH treatment.
Industrial Crops and Products 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 C9H10O4, SDS of cas: 134-96-3.
Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem