丙酮

In the present dissertation, the principles and application of the reaction rectification techology in the syntheses of benzyl chloride, chloroacetic acid, monochloroacetone were approached.

本论文采用反应精馏技术氯化苄的合成、氯乙酸的合成进行了认真的研究，并且对一氯丙酮、氯苄系列产品进行了反应精馏研究，都得到了理想的结果。

This is typically done by exchanging the ethanol for liquid acetone, allowing a better miscibility gradient, and then onto liquid carbon dioxide and then bringing the carbon dioxide above its critical point.

这是典型的交流所做的乙醇液体丙酮，允许一个更好的相容性梯度，然后到液体二氧化碳，然后将其二氧化碳的临界点以上。

Buluofen is powder of white crystallization sex, in the Yi Rong in alcohol, acetone, 3 chloric firedamp or ether, in water scarcely dissolve, in hydrogen oxidation natrium or sodium carbonate try the Yi Rong in fluid.

布洛芬是白色结晶性粉末，在乙醇、丙酮、三氯甲烷或乙醚中易溶，在水中几乎不溶，在氢氧化钠或碳酸钠试液中易溶。

The performance of copper-coated zeolite was better than that without Cu on the removals of NO and Acetone. The NO removal efficiency was increased as the quantity of Cu on the zeolite was increased.

研究结果发现，以铜进行植入改质后之触媒对於丙酮及NO的去除率明显优於未经处理之HiSiv 3000沸石，且NO的去除率与触媒中Cu之含量成正相关。

The mechanism of co-fluorescence effect has been discussed. In chapter six, the new fluorescence enhancement phenomenon was observed by adding some crown ethers to samarium-thenoyltrifluoroacetone system.

在第六章中，研究发现当向钐-噻吩甲酰三氟丙酮中加入配位能力很强的大环配体冠醚时，冠醚对稀土有机配合物体系产生显著的荧光增强作用，其中冠醚二苯并18冠6后（DB18C6）可使钐-TTA二元配合物体系荧光强度增强280倍。

Compared with the MgO prepared by direct thermal decomposition of the MgO precursor, the novel high-specific-surface-area MgO material contains more strong basic sites and less acidic sites and exhibited higher acetone yield and selectivity in isopropanol decomposition, making it a potential solid base catalyst.

与直接焙烧四水乙酸镁制得的MgO相比，这类新型高比表面积MgO具有较多的强碱位和较少的酸性位，并在异丙醇催化分解反应中表现出更高的丙酮收率和选择性，有望成为一类优良的固体碱催化剂。

The PCVD plasma impregnation process of hot forging die includes surface deoiling, polishing, supersonic cleaning in acetone and alcohol dewatering of the die after quenching at 1070 deg.c and tempering at 530 deg.c; plasma nitriding in a industrial PCVD vacuum furnace; and PCVD plating.

本发明公开了一种精密叶片热锻模具的PCVD等离子体渗镀复合强化方法，将经1070℃淬火，530℃回火后的叶片模具(HRC＝43-50)经表面除油、抛光后浸入丙酮中超声波清洗，酒精脱水；然后放入工业型PCVD真空炉内进行等离子体渗氮和PCVD镀膜处理。

With a peak-peak of rectangular asymmetric waveform voltage up to 1 600 V, a frequency of 195.8 kHz, a duty cycle of 30% and a compenstaion voltage of-8.63 V, the acetone displacement is compensated and the sensor ability to separate ions is demonstrated by an experiment using the planar copper drift tube.

当方波非对称射频电压峰峰值为1 600 V，频率为195.8 kHz，占空比为30%，补偿电压为-8.63 V时，采用平板铜块迁移区实现了丙酮离子的位移补偿，实验结果验证了传感器的性能。

Dihydropyrimidin-2 (1H)-ones were synthesized by condensation of aromatic or aliphatic aldehydes, urea and ethyl acetoacetate or acetylacetone one-pot three-component Biginelli condensation in the presence of room temperature ionic liquids as catalysts under solvent-free conditions.

5利用室温离子液体作催化剂，芳香或脂肪醛、尿素和乙酰乙酸乙酯或乙酰丙酮三组分缩合制备3，4-二氢嘧啶-2-酮衍生物。

Wedgeplug O-Seal plug valves with their positive, no-leak features are not only recommended as the best general purpose valves for handling hydrocarbons, vegetable oils, solvents, etc., but are ideal for such tough service as butane, propane, butadiene, acetone, ethyl alcohol, ammonia, anhydrous ammonia, benzene, vinyl chloride, dry chlorine, Dowtherm, ethane, ethylene, hydrogen chloride, napthalene, oxygen, hydrogen, phthalic anhydride, dry phosgene, phosphoric acid, potassium carbonate, styrene, molten sulphur, sulphur dichloride and related services within a temperature range from -300oF to + 450oF within pressure limits of the valves.

楔塞O形密封旋塞阀具有积极的、无泄漏特性，不但是最好的通用的阀门，用于处理碳化氢，植物油，溶剂等，还特别适用于严酷的应用环境，如丁烷，丙烷，丁二烯，丙酮，乙醇，氨，无水氨，苯，氯乙烯，干氯，道氏热载体，乙烷，乙烯，氯化氢，萘，氧，氢，邻苯二甲酸酐，干碳酰氯，磷酸，碳酸钾，苯乙烯，融化硫，二氯化硫，以及温度在-184oC至232oC之间，压力在阀门额定压力等级范围内的有关应用。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。