丙酮

The use ofβ-cyclodextrin can make oximation of acetylacetone happened without sulfuric acid and at high temperature.

9使用环糊精催化乙酰丙酮肟化反应，可在不使用硫酸，较高温度下实现乙酰丙酮的肟化反应。

The use ofβ-cyclodextrin can make oximation of acetylacetone happened without sulfuric acid and at high temperature.

使用环糊精催化乙酰丙酮肟化反应，可在不使用硫酸、高温下实现乙酰丙酮的肟化。

Gibbs free energy of the hydrogenating reaction of acetylacetone iron to produce pure iron and acetylacetone was investigated according to the frequency analysis results.

根据频率分析结果，计算不同温度下乙酰丙酮铁加氢生成铁和乙酰丙酮两种互变异构体的吉布斯自由能。

At the same time,research contents and aim of the synthesis of acetylacetone by high activity MgO at low temperature were described in detail.The technology has some features such as moderate reaction condition,low energy consume and little by-product.The purity and yield of acetylacetone were 99.5% and 95% respectively,so both the economic and social profit are very remarkable.

同时，详述了采用高活性氧化镁为催化剂，低温催化合成乙酰丙酮工艺的研究内容和方向，该工艺反应条件温和，能耗低，副产物少，乙酰丙酮收率达到95%，产品纯度99.5%，经济效益和社会效益均十分显著。

Basing on above researches, we designed a series of ionic liquid supported acetylacetone metal catalysts and non ionic liquid supported acetylacetone metal catalysts. The catalytic abilities of these catalysts were evaluated by using them to catalyze the methane oxidation reaction.

在以上研究的基础上，本论文设计了系列离子液体支载的乙酰丙酮金属催化剂及非离子液体支载的乙酰丙酮金属催化剂，并通过这些催化剂对甲烷氧化反应的催化效果来预测它们的活性。

The precursor solutions of titanium alkoxide with different amount of AcAc were characterized by DTA to study the chelating process of titanium alkoxide with AcAc.

对含有不同量乙酰丙酮的前驱体溶液做了热重分析，研究了钛酸丁酯与乙酰丙酮的螯合过程。

Result Under the pretreatment conditions, the content of acetone extractives transformed. The hydroxyl and carboxyl, belonging to auxochromic groups, were oxidized into the carbonyl and ester groups. Also, there were plenty of auxochromic groups and chromophoric groups in the acetone extractives of silver chain.

结果］刺槐在预处理条件下，丙酮抽出物成分发生了变化，羟基、羧基等助色基团在预处理条件下氧化成羰基、酯基等发色基团，且丙酮抽出物的主要成分中含有大量发色基团和助色基团。

The purity of Monochloroacetone can be reached to 99% by azeotropic distillation in the ratio of water to the mixture of Monochloroacetone and 1,1-dichloroacetone 1:1.

实验确定共沸剂水的加入量与氯丙酮混合液的比例为1：1时，能达到良好的分离效果，可得到纯度99％以上的一氯丙酮。

Chapter 4: Synthesis of 1,5-diary 1-1,4-pentadien-3-ones from acetone or benzalacetone with aromatic aldehydes results in 86-97% yield with potassium hydroxide as catalyst under ultrasound irradiation in 5-60min.

为合成氰基环己醇找到一条方便高效的合成方法。第四章：研究了超声辐射下，以氢氧化钾为催化剂，芳香醛与丙酮及亚苄基丙酮之间反应合成1，5-双苄基-1，4-戊二烯-3-酮。

Benzylidene acetone desorption potential acid sulfate tin plating solution is very close to the ideal desorption potential; Benzylidene acetone, formaldehyde can regulate the desorption potential role and can increase the current density range; Composite additive D can make acid sulfate tin plating solution in the hydrogen produced during the rapid detachment; Ammonium metavanadate can catalyze Sn4+ and restore to Sn2+, and then make solution stability.

苄叉丙酮的脱附电位很接近酸性硫酸盐镀锡溶液的理想脱附电位；甲醛具有调节苄叉丙酮脱附电位的作用，并且能够增大电流密度范围；复合添加剂D能够使酸性硫酸盐镀锡溶液在电镀过程中产生的氢气迅速脱离；偏钒酸铵能够催化Sn4+还原为Sn2+，从而使镀液稳定。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。