查询词典 acetic anhydride

It was found that H3PO4 is an effective catalyst for the acylation of 2,3-dimethyl-2-butene by acetic anhydride at room temperature.

结果表明，H3PO4是室温下催化2，3-二甲基-2-丁烯与乙酐酰化反应的有效催化剂。

This may be readily converted to the anhydrous salt by reaction with a readily hydrolysed material, such as acetic anhydride

这和易水解的物质如醋酸酐反应可以很容易转变为无水盐。

They are prepared starting from natural and renewable sources such as cotton flakes and wood pulp through an esterification process with acetic anhydride.

他们准备从自然和可再生能源如棉花片和木浆通过酯化反应过程的醋酸酐。

The catalytic esterification of acetic anhydride and nine phenols were investigated in the presence of complex resin catalyst at 20 ℃,and its mechanismes were discussed.

研究了 2 0℃时，醋酸酐与九种酚在复合树脂催化剂下的催化酯化反应，并探索了其反应的机理。

The synthesis of terpinyl acetate with terpineol and acetic anhydride as reactants and cerium sulfate as catalyst was studied.

研究了以Ce(SO4)2.4H2O为催化剂，松油醇和乙酸酐为原料合成乙酸松油酯。

From the synthesis of morphine and acetic anhydride derivatives of heroin history, so far, heroin still known as the "King of Drugs."

从吗啡与乙酐合成其衍生物海洛因的历史，到目前为止，海洛因仍被号称"毒品之王"。

Under the optimized conditions, the efficiency of acetic anhydride labeling for the tryptic peptides was up to 100%.

结果表明：在10倍和30倍动态范围内，线性关系良好（r=0.99，r=0.98），理论值和观测值的偏差分别为0.5％和20％。

Sucrose reacted with acetic anhydride for 6h at -25℃.

在-25℃下，蔗糖与乙酸酐（摩尔比为0.95）反应6h即可。

FeCl_3 was used to catalyse the acylation reaction of triisobutylene by acetic anhydride at room temperature.

室温下FeCl3用于催化三聚异丁烯与乙酸酐的酰化反应。

It was found that SnCl_2·2H_2O is an effective catalyst for the acylation of 2,3-dimethyl-2-butene by acetic anhydride at room temperature.

发现SnCl2·2H2O是室温下2，3-二甲基-2-丁烯与乙酐进行酰化反应的有效催化剂。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了