Lu, Yao published the artcileCharacterization of a bio-oil from pyrolysis of rice husk by detailed compositional analysis and structural investigation of lignin, Category: dioxole, the publication is Bioresource Technology (2012), 114-119, database is CAplus and MEDLINE.
Detailed compositional anal. of a bio-oil (BO) from pyrolysis of rice husk was carried out. The BO was extracted sequentially with n-hexane, CCl4, CS2, benzene and CH2Cl2. In total, 167 organic species were identified with GC/MS in the extracts and classified into alkanes, alcs., hydroxybenzenes, alkoxybenzenes, dioxolanes, aldehydes, ketones, carboxylic acids, esters, nitrogen-containing organic compounds and other species. The benzene ring-containing species (BRCCs) were attributed to the degradation of lignin while most of the rests were derived from the degradation of cellulose and hemicellulose. Along with guaiacyl and p-hydroxyphenyl units as the main components, a new type of linkage was suggested, i.e., Car-CH2-Car in 4,4′-methylenebis(2,6-dimethoxyphenol). Based on the species identified, a possible macromol. structure of the lignin and the mechanism for its pyrolysis are proposed. The BO was also extracted with petroleum ether in ca. 17.8% of the extract yield and about 82.1% of the extracted components are BRCCs.
Bioresource Technology published new progress about 1193-11-9. 1193-11-9 belongs to dioxole, auxiliary class Dioxolanes, name is 2,2,4-Trimethyl-1,3-dioxolane, and the molecular formula is C6H12O2, Category: dioxole.
Referemce:
https://en.wikipedia.org/wiki/1,3-Benzodioxole,
Dioxole | C3H4O2 – PubChem