The new nanosolid superacid catalyst SO42-/TiO2 is compounded with nanometer chemical technology. This catalyst SO42-/TiO2 has good catalytic effects on esterificational reactions of ethylic acid and ethyl alcohol. It...The new nanosolid superacid catalyst SO42-/TiO2 is compounded with nanometer chemical technology. This catalyst SO42-/TiO2 has good catalytic effects on esterificational reactions of ethylic acid and ethyl alcohol. It has many other advantages such as strong water proof quality, being able to be used repeatedly, being easy to be reclaimed, non corroding, non polluting. So it is a green industrial catalyst which is helpful to the environment and possesses wide prospect of applications. The crystallo process, specific surface area and sulphur content of the SO42-/TiO2 system have been studied with the method of XRD, XPS and the chemical analysis, the result of which indicates that catalytic activity and acid strength of SO42-/TiO2 is affected by the H2SO4 saturant concentration, baking temperature, precipitating condition, specific surface area and sulphur content. The best preparation conditions of SO42-/TiO2 are: ageing temperature at 0℃, 0.5mol·L-1 of H2SO4 concentration, baking temperature at 500℃and 3 hours of baking time.展开更多
生物碱、季铵盐是重要的两大类药物。钾、铊、银、铜、铷、铯都是有重要用途的金属元素。其分析测试方法已报道的有重量法、萃取 -光度法、非水滴定法。本文依据四苯硼钠 ( Na TPB)与生物碱类药物、季铵盐类药物及 K+、Tl+、Ag+、Cu+、...生物碱、季铵盐是重要的两大类药物。钾、铊、银、铜、铷、铯都是有重要用途的金属元素。其分析测试方法已报道的有重量法、萃取 -光度法、非水滴定法。本文依据四苯硼钠 ( Na TPB)与生物碱类药物、季铵盐类药物及 K+、Tl+、Ag+、Cu+、Rb+、Cs+一价金属离子在一定条件下均能发生定量地沉淀反应 ,又由于 Na TPB是示波活性物质 ,在交流示波极谱图上有敏锐的切口 ,可用 Na TPB切口的出现或消失指示滴定的终点 ,据此建立了示波极谱 -四苯硼钠测定法。方法具有准、快、简。展开更多
文摘The new nanosolid superacid catalyst SO42-/TiO2 is compounded with nanometer chemical technology. This catalyst SO42-/TiO2 has good catalytic effects on esterificational reactions of ethylic acid and ethyl alcohol. It has many other advantages such as strong water proof quality, being able to be used repeatedly, being easy to be reclaimed, non corroding, non polluting. So it is a green industrial catalyst which is helpful to the environment and possesses wide prospect of applications. The crystallo process, specific surface area and sulphur content of the SO42-/TiO2 system have been studied with the method of XRD, XPS and the chemical analysis, the result of which indicates that catalytic activity and acid strength of SO42-/TiO2 is affected by the H2SO4 saturant concentration, baking temperature, precipitating condition, specific surface area and sulphur content. The best preparation conditions of SO42-/TiO2 are: ageing temperature at 0℃, 0.5mol·L-1 of H2SO4 concentration, baking temperature at 500℃and 3 hours of baking time.
文摘生物碱、季铵盐是重要的两大类药物。钾、铊、银、铜、铷、铯都是有重要用途的金属元素。其分析测试方法已报道的有重量法、萃取 -光度法、非水滴定法。本文依据四苯硼钠 ( Na TPB)与生物碱类药物、季铵盐类药物及 K+、Tl+、Ag+、Cu+、Rb+、Cs+一价金属离子在一定条件下均能发生定量地沉淀反应 ,又由于 Na TPB是示波活性物质 ,在交流示波极谱图上有敏锐的切口 ,可用 Na TPB切口的出现或消失指示滴定的终点 ,据此建立了示波极谱 -四苯硼钠测定法。方法具有准、快、简。
