Characterization of liquefied products from corn stalk in the presence of polyhydric alcohols with acid catalysis was written by Zhang, Yan;Wang, Huile;Zhao, Huifang;Liu, Zhong;Huang, Jingjun;Yang, Yujie;Chen, Yu. And the article was included in BioResources in 2022.Quality Control of 3-Amino-2,6-dimethoxypyridine This article mentions the following:
Atm. liquefaction technol. has been used widely and is an effective way of biomass component utilization. In this paper, the liquefied products obtained from corn stalk using polyhydric alcs. 1,2-propanediol (PG) mixed diethylene glycol (DEG) through acid catalysis under atm. pressure were characterized by various anal. technologies. The results indicated that 39 kinds of organic compounds were present in bio-oil, among which alcs. were the most, phenols were the second, and their relative contents were 70.7% and 25.6%, resp. There were also some organic acids, ethers, esters, and ketones. More than 80% of these compounds had a carbon number less than 25. Carbon NMR spectra (13C-NMR) showed that different chem. shifts δ (ppm) corresponded to various carbon types. The chem. composition of the residue from liquefaction was complex and contained a certain amount of large mol. substances that were difficult to degrade. It required more severe pyrolysis conditions than those of corn stalk. Results from X-Ray Diffraction (XRD) indicated the destruction of crystalline structure of carbohydrates and the cellulose mols. were cracked, indicating that the cellulose was degraded and the degree of liquefaction was high. In the experiment, the researchers used many compounds, for example, 3-Amino-2,6-dimethoxypyridine (cas: 28020-37-3Quality Control of 3-Amino-2,6-dimethoxypyridine).
3-Amino-2,6-dimethoxypyridine (cas: 28020-37-3) belongs to pyridine derivatives. Pyridine has a dipole moment and a weaker resonant stabilization than benzene (resonance energy 117 kJ·mol−1 in pyridine vs. 150 kJ·mol−1 in benzene). Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Quality Control of 3-Amino-2,6-dimethoxypyridine