ketene

Ketene process conversion and efficiency calculations

乙烯酮工艺过程的转化率和效率的计算

As an important organic chemical intermediate , Acetyl acetone is generally prepared by ketene method .

乙酰丙酮作为重要有机化工中间体，工业生产多采用乙烯酮法。

By western medicine group pregnant three ketene capsule for treatment .

对照组采用西药孕三烯酮胶囊治疗。

A theoretical study on the mechanism of the dimerization reaction of ketene imine

乙烯基亚胺二聚反应机理的理论研究

A New Method for the Synthesis of α - Acetyl Ketene Dithioacetals

α-乙酰基二硫缩烯酮的新合成方法

Study on nonadiabatic transitions in photo-dimerization of ketene by using classical path method

烯酮光化二聚反应中非绝热跃迁的经典轨迹方法研究

Ketene Stability Compare and Qualitative Explanation

烯烃稳定性的比较及定性解释

Efficiency and Reversion of Alkyl Ketene Dimer Sizing in Calcium Carbonate Filled Papers

在碳酸钙加填纸中AKD施胶的有效性和逆转性

In this reaction , the first example of 1,3-addition to ketene was observed .

研究中，我们首次观察到了对烯酮的1,3-加成反应。

Modification of AKD and Infrared Characterization of Its Products alkyl ketene dimmer

烷基烯酮二聚体改性及其产物的红外表征

Recent Development of Sizing Material & Alkyl Ketene Dimer ( AKD ) for Neutral Sizing

施胶技术的近期发展&以烷基烯酮二聚体进行中性施胶

The result obtained in this thesis has made contribution to the better understanding of heterocyclic ketene aminals .

本文的研究结果进一步丰富了人们对杂环烯酮缩胺的认识。

Ab Initio Study on the Paths of Photodissociation of Ketene

乙烯酮光解途径的从头算研究

Analytical Techniques for Alkyl Ketene Dimmer ( AKD ) in AKD Sized Paper Products

纸品中烷基烯酮二聚体施胶剂的分析技术

As a wildly used organism , acetylacetone was prepared mainly by the absorption of ketene and thermal transition .

乙酰丙酮作为一种应用较为广泛的有机物，其制备的工艺多采用乙烯酮吸收和热转化的途径。

A Theoretical Study of Mechanisms in the Photochemical Reactions of Forming Ketene After the α - Bond Rupture in Cyclohexanone

环己酮α键断裂生成烯酮的光化学反应历程的理论研究

The sizing performance of alkyl ketene dimmer ( AKD ) in bamboo pulp was studied in this paper .

研究了AKD在竹浆中的施胶特牲。

Theoretical Investigation on Novel Donor-acceptor Materials with Organic Light-emitting Diodes Based on α - Cinnamoyl Cyclic Ketene Dithioacetals

基于α-肉桂酰环乙烯酮二硫缩酮的一类新型D-A有机发光材料的理论

The ketene was found act as a one-carbon component in the reaction to form a five-membered ring . 2 .

在此反应中，烯酮体现出不寻常的反应活性，作为单碳组分参与了形式上的[4+1]反应，形成五员环。

Progress on the Chemistry of α - Oxo Ketene Dithioacetals

α-羰基烯酮二硫代缩醛化学的进展

Ketenes , notably dimethyl ketene , readily undergo oligomerization and polymerization .

烯酮，特别是二甲基烯酮，很容易齐聚和聚合。

Alkyl ketene dimer ( AKD ) as a kind of neutral / alkaline size is widely used in alkaline papermaking .

AKD作为一种中/碱性施胶剂，在碱性造纸中得到广泛的应用。

The structure of heterocyclic ketene aminals is peculiar and notable which possesses a large conjugation system in its molecule .

杂环烯酮缩胺是一类在有机合成方面有价值的多官能团反应中间体。

(ⅱ) It was found that the major photodissociation pathway of ketene at 218 nm is the CH_2 ((?)

乙烯酮分子在218nm光解的主要通道是产生CH2（（？）

Ab initio studies on the reaction mechanism of [ 2 + 2 ] cycloaddition of ketene with ethylene and acetylene

烯酮与乙烯或乙炔的[2+2]环加成反应机理的从头计算研究

Studies on organoarsenic compounds & ⅶ . reaction of arsonium ylides with ketene dimer

有机砷化合物的研究&Ⅶ.胂叶立德与双烯酮反应

Alkyl ketene dimmer These resins react with the cellulose to form crosslinks in the less crystalline areas of the cellulose .

烷基乙烯酮二聚物（纤维素反应型的耐久防水柔软剂）这些树脂能够在纤维素非晶区与纤维素发生反应产生交键。

AKD ( alkyl ketene dimer ) emulsions offered good sizing , but rendered very poor ink hold-out .

AKD乳液提供了良好上胶度，但纸之托色效果甚差；

The effects of acylating agents , acetic anhydride and ketene on synthesis of linalyl acetate from linalool were studied .

阐述了乙酸酐和乙烯酮作为酰化剂对芳樟醇合成乙酸芳樟酯反应的影响；

Isopropenyl acetate was synthesized from ketene and acetone by direct esterification using strong acidic cation-exchange resin to substitute H2SO4 as catalyst .

以乙烯酮和丙酮为原料，用强酸性离子交换树脂代替浓硫酸作为催化剂，直接酯化合成乙酰丙酮的中间体乙酸异丙烯酯。