查询词典 anhydride

However,one of the key chemicals in the method is acetic anhydride,which is in the list...

该方法具有准确度高、重现性好、易于操作的特点，相对误差在3%以内，可以满足生产控制质量的要求。

The time for the reaction to go to completion depends on both the amount of catalyst and acetic anhydride used.

该酰化反应进行到完全所需的时间取决于催化剂用量和乙酐用量。

CHEMICAL ANALYSIS OF ACETIC ACID AND ACETIC ANHYDRIDE.

NF T20-625-1965 醋酸和醋酸酐的化学分析。

The acylation of 2,3-dimethyl-2-butene by acetic anhydride in the presence of H3PO4 was investigated.

在H3PO4存在下进行了2，3-二甲基-2-丁烯与乙酐的酰化反应。

Methods Salicylic acid and acetic anhydride were used as the raw materials, with concentrated sulfuric acid as the catalyst.

目的 建立乙酰水杨酸的快速合成方法。

Moreover, the effects of moisture, solvent blank, added amount of acetic anhydride and temperature on determination were investigated.

同时，考察了水分含量、溶剂空白、乙酸酐加入量、温度对测定结果的影响。

The effects of the amount of catalyst, the amount of acetic anhydride, reaction time, and addition of solvents etc. on the acylation reaction were investigated.

考察了催化剂用量、乙酐用量、反应时间和溶剂的加入等因素对该酰化反应的影响。

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。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。