UC知道哪个化工高手帮我翻译一下这两段摘要啊～～？
来源：百度知道 编辑：UC知道 时间：2024/07/05 06:53:19
Abstract
The O-methylation of phenols, including the sterically hindered phenols, with dimethyl carbonate (DMC) under mild
conditions of temperature and pressure was described. The reaction was carried out in the presence of tetrabutylammonium
bromide (TBAB), in a semi-continuous process. Aryl methyl ethers were rapidly and selectively obtained in good yields.
Abstract
The production of diethyl carbonate (DEC) from urea and ethanol was investigated in a batch process. The catalytic activities of many metal
oxides were evaluated, the influences of various operation conditions on the DEC yield were explored, and the catalytic mechanism was also
analyzed. Among the tested catalysts, ZnO showed the best catalytic activity toward DEC synthesis. The optimum reaction conditions were as
follows: ethanol/urea molar ratio of 10, catalyst concentration of 6%, reaction temperature of 463 K, reaction time of 5 h and the reaction pressure
o
The O-methylation of phenols, including the sterically hindered phenols, with dimethyl carbonate (DMC) under mild
conditions of temperature and pressure was described. The reaction was carried out in the presence of tetrabutylammonium
bromide (TBAB), in a semi-continuous process. Aryl methyl ethers were rapidly and selectively obtained in good yields.
Abstract
The production of diethyl carbonate (DEC) from urea and ethanol was investigated in a batch process. The catalytic activities of many metal
oxides were evaluated, the influences of various operation conditions on the DEC yield were explored, and the catalytic mechanism was also
analyzed. Among the tested catalysts, ZnO showed the best catalytic activity toward DEC synthesis. The optimum reaction conditions were as
follows: ethanol/urea molar ratio of 10, catalyst concentration of 6%, reaction temperature of 463 K, reaction time of 5 h and the reaction pressure
o
摘要1
本文叙述苯酚的O-甲醇，包括位阻化合酚，与碳酸二甲酯(DMC),在适度的温度和压力条件下（的反应）。该反应是加有四丁氯溴剂（TBAB）在半连续处理过程下进行的。在正常的溶解条件下，很快并分别得到芳基，甲基乙醚。
摘要2
从尿素和乙醇得到的碳酸乙醇（DEC）的生产，是在喷淋过程下进行试验的。评估了许多金属氧化的催化活动。探究不同条件对DEC溶解的影响；也分析了催化的机理。在这些试验的催化剂中，ZnO是DEC合成的最好的催化剂。
最佳反应的条件分别如下：乙醇/尿素克分子浓度比为10；催化剂浓缩度6%；反应温度463 K;反应是加5小时；反映压力2.5 千巴尔。最高的DEC溶液为14.2%。产生N-乙基乙基氨基甲酸酯（N-EEC）的反应，在该反应过程中是主要的副反应；该过程消耗了乙基氨基甲酸酯和DEC两者。需要尽快地把DEC从反应器里除掉。