介绍了尿素转化成三聚氰胺的化学反应机理及三聚氰胺低压催化法工艺的最佳反应条件。
This article introduces the chemical reaction mechanism of urea conversion into melamine. It also describes the optimum reaction conditions for low-pressure Catalytic melamine production process.
结果表明，采用一步法合成二甲醚如果存在水汽变换反应，CO2的转化率为负值，如果催化剂可以控制不发生水汽变换反应，CO2的转化率为零。
The results indicated that the conversion of CO2 is negative if the watergas shift reaction exist and it will be zero if the catalyst can control no watergas shift reaction to take place.
本文介绍的基于氨氧化法生产烟酸的工艺，选择了适当的复合催化剂，使原料3-甲基吡啶转化率可达99％，技术水平达到国外先进水平。
The manufacture process of nicotinic acid based on ammonia oxidation method, which is introduced in this article, reached 99% conversion of 3-methyl pyridine.
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