Eight N 5 (3 carboxy 1,2,4 triazolyl) N ′ aroyl ureas have been synthesized from 3 amino 1,2,4 triazolyl 5 carboxylic acid and substituted benzoylisocyanates in yields of 59 6%～55 9% with mp>300 ℃. The structure...Eight N 5 (3 carboxy 1,2,4 triazolyl) N ′ aroyl ureas have been synthesized from 3 amino 1,2,4 triazolyl 5 carboxylic acid and substituted benzoylisocyanates in yields of 59 6%～55 9% with mp>300 ℃. The structures of the title compounds were confirmed by IR, 1H NMR and elemental analysis. The room temperature biological activity tests showed that some target compounds have a good activity as plant growth regulator, the best of them appeared compounds Ⅱ b and Ⅱ c(for auxin).展开更多
文摘尿素水解制氨工艺在火电厂SCR脱硝还原剂制备中逐渐得到应用,其操作条件和工艺路线与传统的化工行业尿素深度水解技术存在显著差别。中试试验数据表明,尿素水解制氨工艺的操作压力应选择0.6 MPa,定压运行,操作温度接近150℃。操作条件下尿素分解率大于98%,尿素水解反应的选择性为93.4%,指前因子和活化能参数分别为2.98×106 s-1和86.575 k J/mol。设计水解反应器时应在确保布置足够受热面的前提下尽量缩小反应器体积。本研究将为火电厂烟气脱硝用尿素水解系统工艺设计提供参考。
文摘Eight N 5 (3 carboxy 1,2,4 triazolyl) N ′ aroyl ureas have been synthesized from 3 amino 1,2,4 triazolyl 5 carboxylic acid and substituted benzoylisocyanates in yields of 59 6%～55 9% with mp>300 ℃. The structures of the title compounds were confirmed by IR, 1H NMR and elemental analysis. The room temperature biological activity tests showed that some target compounds have a good activity as plant growth regulator, the best of them appeared compounds Ⅱ b and Ⅱ c(for auxin).
