查询词典 phosgene

In this dissertation, the practical significance and the recent development of non-phosgene synthesis of N-substituted carbamates are reviewed briefly, as well as the application of ionic liquids in catalysis.

本论文综述了非光气合成N-取代氨基甲酸酯类化合物的现实意义和研究进展，以及离子液体在催化反应中的应用。

Latest researches in the catalysts for synthesis of carbamate by ammonolysis of dimethyl carbonate;2. Progress in the catalysts for synthesis of carbamates by ammonolysis of dimethyl carbonate;3.4,4′-Methylene diphenyl carbamatewas synthesized by ammonolysis of dimethyl carbonate, a substitute of phosgene, and 4,4′-diaminodiphenyl methane with anhydrous zinc acetate as catalyst.

用碳酸二甲酯代替光气，以4，4′-二氨基二苯基甲烷为原料，在无水醋酸锌催化剂的作用下，经胺解反应合成了4，4′-二苯甲烷二氨基甲酸甲酯；测定了MDC的熔点；采用傅里叶变换红外光谱和氢核磁共振对产品结构进行了表征；考察了反应温度、DMC用量、反应压力、反应时间、催化剂用量对MDC收率的影响。

"Phosgene:Colorless, highly toxic gas used in chemical warfare as well as in industrial processes including the making of dyestuffs and polyurethane resin s."

光气：无色剧毒气体，用于化学战以及工业生产过程，包括制造染料和聚氨酯树脂。

At last, the experimental results show that the prediction correct rate for 50 unknown samples of gaseous Dimethyl Methyl Phosphonate, Dimethyl Benzene, Sarin, Soman and Phosgene is 98%, and the maximum relative measuring errors of gaseous DMMP and gaseous DMB are 3%.

实验结果表明，本系统对气态甲基磷酸二甲酯与气态二甲苯两种毒气模拟品和沙林、梭曼与光气三种毒气共50 个未知样本预测识别的正确率为98%，两种毒气模拟品的最大相对测量误差为3%。

Such as PVC, urea, the anhydride, caustic soda production plant, or external leakage demanding medium, such as HF, such as phosgene.

如PVC、尿素、本酐、烧碱生产装置中，或对外泄漏要求高介质，如HF，光气等。

The proportion of the phase transfer catalyst and tertiary amine are usually in the range of about 1-5 and about 0.01-5.0 mole percent, respectively, based on total dihydroxyaromatic compound and dicarboxylic acid employed. In the second phosgenation step, the pH is raised to at least 10 and a stoichiometric phosgene excess of at least 5% is introduced.

相转移催化剂和叔胺的比例以二羟基芳族化合物和二羧酸的总量为基础计通常分别在约1―5和0.01―5.0摩尔百分数的范围内，在第二步光气化步骤中，pH值升高到至少约10，并导入超过化学计量约至少5wt％的光气。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。