查询词典 crotonaldehyde

Synthesis of the raw materials of these two substances is croton oil, the use of cultivation in Asia crotonaldehyde seed extract vegetable oil, the whole process of only five steps.

合成这两种物质的原料是巴豆油，利用种植在亚洲的巴豆种子提取植物油，整个合成过程只需要五步。

With the increase of crotonaldehyde, the conversion and rapid of copolymerization decrease.

随丁烯醛在单体中比列的增加，共聚合反应转化率和聚合速率均下降。

The synthesis development of crotonic acid by oxidation of crotonaldehyde was reviewed.

综述了巴豆醛催化氧化合成巴豆酸的研究进展。

2Mol/L. It was also found that the effect of crotonaldehyde on the copolymerization is inhibition.

丁烯醛对共聚合反应有一定抑制作用。

The promoting effect of Zn on liquid phase hydrogenation of crotonaldehyde over amorphous Co-B catalysts has been investigated.

考察了Zn的两种不同修饰方式对非晶态Co-B催化剂上巴豆醛液相加氢性能的影响，并采用ICP， XRD， DSC， XPS等手段对催化剂进行了系统的表征。

The methods of determination of crotonaldehyde in various samples of the PVA producing line by gas chromatography and flame ionization detector are discussed in this paper.

探讨了采用气相色谱法，氢火焰离子化检测器测定聚乙烯醇生产过程各种有机物料中的丁烯醛含量的方法以及操作条件、内标校正因子的求法。

Crotonaldehyde aldehyde is acetaldehyde as raw materials, as a condensation NaOH solution extraction, manufacturing sorbic acid is the main raw material.

巴豆醛是以乙醛为原料，经NaOH溶液萃取缩合产生，是制造山梨酸的主要原料。

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。

From the influnce of pH change in water on the copolymerization, the copolymerization mechanism was provided. The copolymerization mechanism is that there is hydrogen bond, which can enhance the copolymerization, between acrylic acid and crotonaldehyde at low pH and there is"Charge Transfer Complex", which gives the more crotonaldehyde in P (acrylic acid-crotonaldehyde), between acrylic acid and crotonaldehyde at high pH.

根据共聚合反应介质pH值变化对丙烯酸-丁烯醛共聚合反应的影响，提出了丙烯酸-丁烯醛共聚合反应机理，即在低pH值时，丙烯酸、丁烯醛之间可形成氢键，从而使共聚合体系具有较高的聚合反应速率和转化率；在较高pH值时，丙烯酸、丁烯醛之间则有电荷转移络合物形成，从而使共聚物中含有更多的丁烯醛链段。

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。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。