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2-[N-甲基-N-(2-吡啶基)氨基] 乙醇制备条件的优化 总被引:1,自引:0,他引:1
2-[N-甲基-N-(2-吡啶基)氨基]乙醇是合成罗格列酮(Rosighitazone)的一种中间体,罗格列酮是新型噻唑烷二酮类胰岛素增敏剂,通过两轮优化设计,实验室小试得到了较好的反应条件.为工业化生产提供了基础数据。 相似文献
23.
嗜单宁管囊酵母木糖酒精发酵的研究 总被引:3,自引:0,他引:3
综合利用丰富、廉价且可再生的农作物秸秆资源生产酒精的研究已经渐渐成为全球范围的热点之一。文章研究了嗜单宁管囊酵母木糖酒精发酵的发酵性能,分离、筛选、驯化培养出一株高效木糖酒精发酵菌株 g-13,在最适条件下其木糖酒精发酵的转化率为 0.446 g/g(酒精/消耗的糖),为发酵秸秆纤维水解液中的戊糖生产燃料酒精提供菌种支持。 相似文献
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能源多元化对保障国家能源安全,紧跟世界能源发展趋势,及时转变能源发展战略的意义重大。分类讨论替代燃料,分析其发展态势和需要的支撑条件。 相似文献
25.
B. Stypuła J. Banaś M. Starowicz H. Krawiec A. Bernasik A. Janas 《Journal of Applied Electrochemistry》2006,36(12):1407-1414
The anodic behaviour of copper was investigated in ethanol solution containing LiClO4, LiCl electrolyte and water. The type of electrolyte and the water content influences the mechanism of the anodic process and the formation of anodic products. In LiClO4 electrolyte the dissolution of copper is related to the oxidation of Cu(I) to Cu(II). In solutions of LiCl the etching of copper begins with the creation of soluble complexes of Cu(I) with chloride ions and solvent molecules. At potentials above 0.4 V the formation of alkoxides was observed in both solutions, characterized by a yellow tint. On the other hand, above 0.8 V (i.e. above the equilibrium potential of alcohol oxidation) copper dissolution is accompanied by the formation of a blue colloidal suspension of Cu (II) copper salt. Anodic etching of copper in solutions containing 3% H2O at potentials higher than 0.4 V leads to the formation of colloidal suspension of copper oxide nanoparticles. 相似文献
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The effect of the platinum particle size was investigated for the catalytic oxidative dehydrogenation of aqueous ethanol to ethanal at a temperature of 303 K, an ethanol concentration of 260 mol m–3, a partial oxygen pressure 60 kPa, a pH of 9, and an ethanal and ethanoate concentration of 20 mol m–3. A particle size effect on the turnover frequency was observed but only for particle sizes smaller than 2 nm. Hence, the reaction shows a limited structure sensitivity. 相似文献
28.
Vapor phase carbonylation of ethanol with Ni/C and Ni-Zn/C catalyst was investigatedunder atmospheric pressure.Ni-Zn/C was found to have a significantly higher activity andselectivity than Ni/C.Effects of Zn and Ni loading on ethanol conversion and productdistributions were also investigated,and the sequence of metal loading was compared.The cata-lyst was characterized by XRD(X-ray diffraction)and SEM-EDS.The spectra of XRDdemonstrated that the catalyst structure was changed from crystalline to non-crystalline in theprocess of carbonylation.Stable iodide compound was formed due to the interaction betweenC_2H_5I and active metals.The authors believe that the active phase of carbonylation might havebeen non-crystalline. 相似文献
29.
Bioconversion of sludge from the primary clarifier of a sulphite pulping operation to ethanol offers a number of advantages over conventional disposal options. The amount of material which must be disposed of is reduced while, at the same time, salable and environmentally friendly fuel-ethanol is produced. In this study, primary clarifier sludge (PCS) was shown to be hydrolysed to produce fermentable sugars at a rate proportional to enzyme loading. Initial (1 hour) hydrolysis rates as high as 12.6 g reducing sugar/L · h were observed at an initial enzyme loading of 10 filter paper units (FPU)/g. Hydrolysis was inhibited by spent sulphite liquor (SSL), an inhibition which could be completely overcome by fermenting the SSL to remove sugars. Surfactants were found to only marginally improve the production of sugars. To reduce the deleterious effects of end product inhibition, single stage simultaneous hydrolysis and fermentation (SHF) was carried out using cellulase enzymes and Saccharomyces cerevisiae. 相似文献
30.
The aluminated sepiolite, obtained by alkaline treatment with KAlO2, as well as the silver-exchanged aluminated sepiolite were tested in ethanol conversion. The reactions were performed at 280°C and with 50 Torr of ethanol in He. After the alumination through KA1O2, ethanol dehydrogenation and ethanol dehydration resulted from the Lewis acidity. The dispersion of silver led to a bifunctional catalytic system and the overall catalytic activity and the selectivity towards the acetaldehyde production increased. As a result of the Prins reaction, a significant yield in butadiene was observed. 相似文献