查询词典 acetic aldehyde

Crotonic acid can be made by crotonaldehyde oxidized,and crotonaldehyde widly exists asthe accessory substance in the chemical enterprises that produce and use aldehyde.

丁烯酸可由丁烯醛氧化制得，而丁烯醛在生产和使用乙醛的化工企业作为副产物广泛存在，是一种需治理的废弃物，我国具有生产丁烯酸的原料条件。

Acid--aldehyde polymer tanning agent P (acrylic acid-crotonaldehyde was copolymerizaed from acrylic acid and crotonaldehyde in water and its structure was characterized by IR,〓C-NMR and DSC.

以丙烯酸、丁烯醛为共聚单体，采用水溶液共聚法，合成了含醛、酸基团高分子鞣剂----丙烯酸-丁烯醛共聚物，并利用IR光谱、〓C-NMR及DSC对其结构进行了确认和表征。

Polyvinyl alcohol acetalizing conjugated olefine aldehyde; starch; crolein; crotonaldehyde; reaction mechanism

工程科技I，化学，高分子化学聚乙烯醇缩共轭烯醛；淀粉；丁烯醛；丙烯醛；反应机理

It was used for catalytic oxidation of crotonic aldehyde to crotonic acid .

以浸渍法制备的Al_2O_3负载金属氧化物为催化剂，催化氧化巴豆醛制备巴豆酸。

Secondly, the reaction of crotyl bromide and carbonyl compounds promoted by dysprosium were studied. The γ-adduct of crotyl was mainly obtained in the reaction of ketone and ester. While the α-and γ-adduct mixture were obtained in the reaction of aldehyde.

其次，还研究了镝促进下巴豆基溴与羰基化合物的反应，酮和酯主要得到巴豆基γ-位进攻的产物，而醛则得到α与γ位进攻的混合产物。

SiC nanowires were found in crystallochemical analysis of SiBONC ceramic powder, which was synthesized through a polymer pyrolysis route from the raw materials of tetrachloride, phenyle aldehyde, boron trichloride and aniline.

在对SiBONC陶瓷粉末坯体进行高温气压处理时，发现在坯体表面生长出大量β-SiC 纳米线。

Knoevenagel condensation reaction between aromatic aldehyde, malononitrile or ethyl cyanoacetate is promoted by organocatalyst N-methylimidazole.

以1-甲基咪唑为有机小分子催化剂催化芳香醛与丙二腈或氰乙酸乙酯的Knoevenagel缩合反应，反应速度快，操作方便，产率高，后处理简单。

The present invention belongs to the field of chemical technology, and is a kind of supported tungstic acid catalyst for multiphase catalytic oxidation and synthesis of glutar aldehyde from cyclopentene.

本发明属于化工技术领域，是一种新型的环戊烯多相催化氧化合成戊二醛的负载型钨酸催化剂。

The results of the herbicidal effects study display that 1,4-dioxoquinoxaline formaldehyde-salicylic aldehyde dihydrazone and 1,4-dioxoquinoxaline formaldehyde acetone dihydrazone have obvious herbicidal activity.

研究结果表明1，4-二氧喹喔啉-2-甲醛-水杨醛双腙和1，4-二氧喹喔啉-2-甲醛-丙酮双腙表现较明显的活性，在500mg/L浓度时对稗草的株防效分别为51.3%和55.0%；对油菜株防效较弱，分别只有33.5%和17.5%。

Tt can be seen from the table that, on the whole, the hydroxyl,methoxyl and dimethylamino groups activate the nucleuswhereas hydrogen, chlorine or the methyl group cativate the aldehyde group.

Tt能被从总体上桌子那看见，然而氢，氯或者甲基把cativate分组，羟基，methoxyl和dimethylamino组使核心

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。