Determination of content of sodium methoxide and its solubility in tetrahydrofuran by micro - titration 微量滴定法测定甲醇钠含量及其在四氢呋喃中的溶解度
3.
In the function of sodium methoxide , several factors effecting on alcoholysis of urea by zinc oxide catalyst were obtained 探讨了在甲醇钠作用下，氧化锌催化尿素醇解的影响因素。
4.
The experimental results showed that when sodium methoxide were joined , the yield of methyl carbamate as a intermedium was clearly increased . , and even made clearly that the reaction was divided into two steps 实验表明，通过引入少量的甲醇钠，使中间产物氨基甲酸甲酯的产率有明显提高，进而表明尿素醇解是分两步进行的。
5.
Afterwards , the remnant lactic acid in lactide was measured by non - aqueous titration with sodium methoxide and the remnant water was surveyed by karl - fisher method . the melting point was investigated by thiele tube and the characteristics of lactide were analyzed by ir , uv spectrum , tg and dsc respectively 然后，用甲醇钠非水滴定法测定丙交酯中残存乳酸，卡尔-费休法测定丙交酯中残存水的含量，用提勒管测定精制丙交酯熔点，用红外吸收光谱、紫外光谱、差热分析对合成的丙交酯以及回收的丙交酯进行表征。
