Sulfur method replaced by acetic anhydride method for chloroacetic production is the trends in domestic.

指出在國(guó)內(nèi)用醋酐法代替硫磺法生產(chǎn)氯乙酸的必然趨勢(shì)。

The synthesis of sucrose octaacetate from sucrose with acetic anhydride in the presence of anhydrous sodium acetate is reported.

報(bào)道了在無(wú)水乙酸鈉存在下亚洲国产图片大全视频，蔗糖和乙酸酐反應(yīng)合成蔗糖八乙酸酯日韩一级免费黄片。

Main Products polyformaldehyde, ethylene dichloride, dichloroethane, acetic anhydride, etc. in the industry has a good reputation.

主營(yíng)產(chǎn)品多聚甲醛、二氯乙烯久久久久久九综合久日本精品、二氯乙烷chengren视频在线观看、醋酸酐等在業(yè)界具有較好的聲譽(yù)。

This article describes the production status, and discusses the strongpoint and shortcoming of using differente catalyst, sulfur and acetic anhydride .

對(duì)比兩種催化劑的實(shí)際生產(chǎn)情況亚洲精品污污网站欧美，闡述用硫磺以及用醋酐的優(yōu)缺點(diǎn)美女一级a毛片免费观看。

The effects of reaction time and acetic anhydride/anhydroglucose unit molar ratio on the DS of starch acetates were investigated.

考察了反應(yīng)時(shí)間和酰化試劑用量對(duì)趼易泳肺蘼胍磺化程度的影響色色色色色男人视频网站。

The results showed that the optimal condition was achieved when the ratio of water-soluble gardenia blue pigment to acetic anhydride was 1:20 and reaction time 4 h at room temperature.

結(jié)果表明：采用料液比1：20，在常溫下反應(yīng)4 h国产淫网站，為制備憎水性梔子藍(lán)色素的最優(yōu)條件国产刺激性爱视频。

Then add, in the following order, 93±3 mg (0.5 mmol) of ferrocene, 0.35 mL of acetic anhydride, and 0.1 mL of 85% phosphoric acid.

然后按以下的次序，加入93±3 mg (0.5 mmol)的二茂鐵欧美性爱一级片A片，0.35ml的乙酐给个av网站，和0.1ml 85%的磷酸。

Ferrocene will be acetylated by the action of phosphoric acid* and acetic anhydride*.

二茂鐵可以與磷酸*和乙酐*作用而被乙醯化95视频A片免费体验在线观看。

Acetic sort is different, the content of organic acid also each are not identical.

醋的種類不同最新A片永久免费观看，有機(jī)酸的含量也各不相同。

Acetic. Term applied to wines which have under gone acetification and to the odour of such wines.

醋酸的：用于描述發(fā)生醋酸化的葡萄酒天天干干干，以及此類葡萄酒所散發(fā)出的氣味欧美第一射。