The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 6-Hydroxy-2-methylpyrimidin-4(3H)-one( cas:1194-22-5 ) is researched.Quality Control of 6-Hydroxy-2-methylpyrimidin-4(3H)-one.Chen, Hanping; Lin, Guiying; Chen, Yingquan; Chen, Wei; Yang, Haiping published the article 《Biomass Pyrolytic Polygeneration of Tobacco Waste: Product Characteristics and Nitrogen Transformation》 about this compound( cas:1194-22-5 ) in Energy & Fuels. Keywords: biomass pyrolysis polygeneration tobacco waste nitrogen transformation. Let’s learn more about this compound (cas:1194-22-5).
Conversion of waste to high-value products by pyrolysis is a suitable and harmless disposal technol. for the abundant waste generated in the tobacco industry. To determine the optimum operational parameters for biomass pyrolytic polygeneration using tobacco waste as the feedstock, the product characteristics and N transformation were studied from 250 to 950°. The highest low calorific values of gas and char were 13 MJ/m3 at 750° and 15 MJ/kg at 450°, resp. The optimum operating temperature recommended for biomass pyrolytic polygeneration of tobacco waste is 650° when the 3 products (char, oil, and gas) are balanced. The char formation process is divided into 3 stages: degradation (250-450°), reforming (450-650°), and condensation (>650°). Three types of N-containing structures are formed in chars: pyridinic N, pyrrolic/pyridine N, and quaternary N. Pyridinic N is dominant at low temperatures, whereas quaternary N becomes dominant at high temperatures N-containing volatiles escape from chars with increasing temperature and are primarily found in oil <550° and in gas >650°. N-containing compounds are the major components (up to 45%) in the organic portion of oil, with pyridines, pyrroles, and piperidines as the dominant forms. In the gas product, NH3 and HCN are the major N-containing compounds released >650°. This study is expected to be beneficial for the comprehensive use of tobacco waste.
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Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem