Strazzolini, P
1) What is the role of the H2SO4 in reactions of esterification?... i have no idea how to approach this... i know that H2SO4 --> (esterifyied?) is sulfate.. but i dunno if that has anything to do with it 2) How is he -OH radical of an alcohol different from that of an...
H2SO4 was chosen as the acid catalyst because the AV of SSE was much higher than 1 (Jung et al. 2020a). The biodiesel yield from acid-catalyzed transesterification (5 wt.% H2SO4) was less than 1 wt.% after 24 h of reaction at 60 °C (Fig. 3). This is ...
1.FFA was removed by acid-catalyzed firstly,then NaOH was employed to convert remaining acylglycerols into fatty acids esters.以浓H2SO4为催化剂,将游离脂肪酸先进行甲酯化,再以NaOH为催化剂,对甘油三酯进行酯交换制备生物柴油,通过正交试验分析游离脂肪酸甲酯化及甘油三酯酯交换的最佳条件。 2.After that,NaO...
by evaporation, (iv) the crystallisation of acetaminobenzene- sulphinic acid (ABSA), which is carried out as a continuous process; (v) the esterification of acetaminosulphone (AASO) with sulphuric acid (H2SO4) by feeding H2SO4-containing AASO in suspension in H2SO4 into a mixing ...
by reacting digitoxigenin (II) or digoxigenin with H2SO4 or its derivs. (e.g. ClSO3H, SO3 or SO-base adducts. The products can opt. be converted to the corresp. cpd. where R2 = Me by reaction with diazomethane. Cpds. (I) are positive-inotropic cardioactive agents with much higher ...
Analytical thin layer chromatography (TLC) was performed on silica gel (15–40 µm PF254) 0.25 mm and 0.5 mm thick plates respectively (supplied by Merck), and the spots were visualized by spraying with AcOH/H2O/ H2SO4 (37:8:5) mixture, followed by heating to 100 °...
H2SO4-SiO2 > HBr-SiO 2 > TfOH-SiO2 ? HBF4-SiO2 ≈ TFA-SiO2. When HClO4 was immobilized on other solid supports the catalytic efficiency followed the order HClO4-SiO 2 > HClO4-K10 > HClO4-Al 2O3 (neutral) > HClO4-Al2O 3 (acidic) > HClO4-Al2O3 (basic). Liquid-liquid ...
Drtil, Treatment of industrial wastewater with high content of polyethylene glycols by Fenton-like reaction system (Fe0/H2O2/H2SO4), Desalin. Water Treat. 51 (2013) 4489–4496. https://doi.org/10.1080/19443994.2013.769704. Google Scholar [36] T.X. Viegas, M.D. Bentley, J.M. Harris,...
以2,5-二甲基-2,5-己二醇(DIOL)为原料,质量分数为30%的H2O2为氧化剂,H2SO4为催化剂,在较温和条件下合成双官能度引发剂2,5-二甲基-2,5-二过氧化羟基己烷(DIOOH),考察H2O2与DIOL物质的量比、H2SO4与DIOL物质的量比、反应时间、反应温度因素对DIOOH产率的影响,采用13C-NMR、MS等手段对产物结构进行表征。