查询词典 phosgene

Dimethylhexane-1,6-dimethyleurethane is the key material for preparation of 1,6-hexamethylene diisocyanate by non-phosgene route. Our work mainly focuses on the study of the catalytic performances of metal oxysalts and metal oxides for the ammonolysis of DMC to HDU-M. Experiment effect showed the ammonolysis was omposed by two steps, in which the first step was easier to occur than the second.

中文摘要六亚甲基-1，6-二氨基甲酸甲酯是非光气合成六亚甲基二异氰酸酯的关键原料，本文主要对金属含氧酸盐和金属氧化物这两类用于碳酸二甲酯胺解合成HDU-M 的催化剂进行了初步研究并优化了工艺条件。

Phosgene ; lung/injuries ; oligonucleotide array sequence analysis ; gene expression

光气； 肺/损伤；寡核苷酸序列分析；基因表达

Asphyxiant gas (chlorine, phosgene, etc.): Pungent or hay-like odor. White or yellowish in color.

窒息气体：气味：刺激或干草腐烂的气味，颜色：白色或黄色。

Such a method can replace traditional reaction with phosgene as the carbonylation reagent, involving the toxic reagent and drastic reaction conditions, the new herein studied method is environmentally benignancy and has atom economical selectivity.

它可代替以往的利用光气来给化合物引进一个羰基的方法，具有原子经济反应的高选择性和对环境的友好性，从而越来越受到人们的关注，已成为C〓化学中羰基合成领域的一个重要的研究热点。

Synthesis technology and purification method and cleaner production of benzophenone by phosgene are studied.

本文系统研究了光气路线生产二苯甲酮的合成技术、纯化方法及相应的清洁生产模式。

The experimental results show that:Under the conditions of reaction temperature 350℃,space velocity 4 800 h~(-1)and volume ratio of air to waste gas 15,the conversion rates of chloromethane and total hydrocarbon are all larger than 99%;There is almost no phosgene generation;HCl in the tail gas of oxidation can be well absorbed by NaOH solution;The activity of the catalyst usingγ-Al_2O_3 a...

实验结果表明：在反应温度为350℃、空速为4 800 h~(-1)、空气与氯甲烷废气的体积比为15的条件下，氯甲烷转化率和总烃转化率均大于99%，催化氧化过程中基本不产生光气；催化氧化反应后尾气中的HCl用NaOH溶液作吸收剂的吸收效果较好；γ-Al_2O_3为载体的催化剂活性基本稳定。

S environmental consciousness and popularization of the cleanness craft, high toxicity, high dangerous phosgene, dimethyl sulfate, chloromethane and methyl chlorocarbonate, etc., will be washout in the world.

随着人们环保意识的提高和清洁工艺的推广，高毒性、高危险性的光气、硫酸二甲酯、氯甲烷、氯甲酸甲酯等化学品在世界范围内必然被淘汰。

The persons exposed to phosgene and with abnormal chest X-ray should be suspected phosgene poisoning without clinical symptoms.

出现接触光气后，无临床症状但胸部X线异常的患者－疑似中毒。

Solid at room temperature, phosgene is a solid, relatively stable, even when boiling, only a small amount of decomposition, as a substitute for phosgene, not only low-toxic and easy to use, and the mild reaction conditions, good selectivity and high yield.

固体光气在室温下是固体，比较稳定，即使沸腾时，也仅仅少量的分解，作为光气的替代物，不仅毒性低，使用方便，而且反应条件温和，选择性好，收率高。

Among the non-phosgene synthesis of isocyanate presented, the most promising one is the thermal decomposition of N-substituted carbamates. Unfortunately, this kind of compound is also mainly produced from phosgene or phosgene derivatives in industry.

中文摘要在目前所报导的非光气合成异氰酸酯路线中，N-取代氨基甲酸酯热裂解法是最具有应用前景的一条途径，然而这类化合物的工业化生产也是以光气法为主。

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。