aldehyde reaction
英
美
网络 康尼扎罗反应
双语例句
- Reaction is carried out under a fractionating column that allows aldehyde to pass but returns alcohol to the reaction vessel.
反应是在装有分馏柱的反应器中进行的，分馏柱能让醛通过但使醇回流到反应器中。 - Acetaldehyde generated from the2-butene aldehyde carbonyl and the reaction is the condensation of methylene
由乙醛生成2-丁烯醛的反应是羰基与亚甲基发生缩合的 - A method of preparing trimethylolethane from formaldehyde and propionic aldehyde in water was introduced in the presence of the base through cross Cannizzero reaction.
介绍了以甲醛、丙醛为原料，水为反应介质，碱催化进行交叉康尼扎罗反应制备三羟甲基乙烷的方法。 - Aldehyde oxidation, hydrogenation reaction on main, condensation, de Carbonyl;
发生在醛基上的反应主要有氧化、氢化、缩合、脱羰基等； - Aldehyde gel is applied to acidize formation to solve retarding reaction velocity and sand controlling as a result of its low gelation pH value ( pH < 3).
由于醛冻胶的成冻pH值较低（pH值<3），因此可将其用于地层酸化，以解决酸化过程中的缓速与出砂问题。 - Oxygen containing polymers come from the aldol condensation of ketone and/ or aldehyde, which are produced from the secondary reaction of steam cracking.
含氧聚合物主要来自于醛酮的Aldol缩合聚合反应，而裂解气中的醛酮来自于蒸汽裂解制乙烯过程中的二级反应。 - The effects of mole ratio between resorcinol and phenol, also between phenol and aldehyde, original reaction time on gel time and shear strength were studied.
考查了间苯二酚与苯酚物质的量比、酚与醛物质的量比、预反应时间等因素对胶粘剂凝胶时间与剪切强度的影响； - Based on the reported pinacol coupling of aldehyde and ketone mediated by low valent vanadium or titanium, some new reaction systems or methods were explored to improve the chemoselectivity and stereoselectivity of pinacol coupling.
本文在总结利用低价钒、钛诱导醛酮发生片呐醇偶联反应的基础上，寻求新的反应体系或方法，以提高片呐醇偶联反应的化学选择性和立体选择性。 - The calculated results show that DMB is activity to get electron, and the carbon in the aldehyde group is the nucleophilic reaction site.
计算结果表明：DMB分子容易得到电子，且醛基上的碳原子是亲核反应的作用点。 - This paper presents its preparation process and property, discusses the influence of aldehyde/ phenol ratio, catalyst and reaction time on resin property, and the influence of resin solid content, modifier and density on foam property.
介绍了其制备工艺和性能，讨论了醛/酚比、催化剂和反应时间对树脂性能的影响，以及树脂固含量、改性剂、密度对泡沫性能的影响。 - The properties, uses, and advance in producing process of acrolein were introduced, of which the emphasis was put on the review of advance in acrylic aldehyde producing process by propylene oxidation reaction in tubular solid bed reactor.
介绍了丙烯醛的性质、用途及生产技术进展，重点回顾了通过管式固定床反应器的丙烯氧化反应工艺生产丙烯醛的技术进展。 - The optimum reaction conditions were: in the first stage, amount of formaldehyde, isobutyl aldehyde, and triethylamine respectively 2.9,2.7, and 0.07 mol, reaction time 6 h, reaction temperature 70 ℃;
较佳反应条件为：第一步反应中，甲醛、异丁醛、三乙胺的用量分别是2.9,2.7,0.07mol，反应时间6h，反应温度70℃； - Chitosan react with vanillin aldehyde by Schiff's base reaction in water, A polymer product-VCG can be prepared.
在水溶液中，壳聚糖与香草醛发生希夫碱反应，生成改性壳聚糖VCG。 - Aldehyde containing functional groups can react with allyl iodine and tin directly, water is of no advantage to the reaction.
含活性基团的醛可与烯丙基碘和锡粉直接进行亲核加成反应，得到高烯丙基型的醇。水的存在不利于此反应的进行。 - In real teaching, another experiment that adds and examines aldehyde group-silver mirror reaction helps the students to a certain extent in understanding the characteristics of cellulose.
在实际教学中，补充检验醛基的另一个实验&银镜反应，对学生认识纤维素性质的知识整合有一定作用。 - This article introduces the new method of producing n-amyl aldehyde with 2-butene as raw material and Fe-Co as catalyst via oxo reaction. It can decrease the cost comparing with the method of using noble metals Co or Rh as catalyst.
文中介绍了以2-丁烯为原料，用铁钴簇催化剂羰基合成法制正戊醛的新方法，与用贵金属铑、钴催化剂法相比，可降低产品成本。 - Jasmine aldehyde is synthetized by the condensation of heptaldehyde with benzaldehyde in alkaline medium. Effects of reaction temperature, reaction time and the quantity of alkali needed on yield are discussed.
以庚醛和苯甲醛为原料在碱性介质中缩合合成α&戊基肉桂醛.讨论反应温度、反应时间和投碱量对产率的影响。 - Perilla aldehyde was prepared by Isomerization of myrtenal, Cu/ ZnO as Catalyst. Effect of reaction temperature, vacuum of the system, space velocity of myrtenal on the reaction have mainly been studied.
用桃金娘烯醛在Cu/ZnO催化下异构制备紫苏醛，重点考查了反应温度、真空度、空速的影响。 - Methods Aromatic aldehyde and 2, 4-pentanedione was used as the starting materials, which were dissolved in ethyl acetate in the presence of boron oxide and n-butylamine. The reaction was kept at 80 ℃ for 3 h.
方法分别用芳醛和2,4-戊二酮的硼化合物为原料在正丁胺的催化作用下，80℃反应3h，合成目标化合物； - Reducing The Content of Free Aldehyde in 107 Glue which caused by Additive Reaction Nitric Derivatives React on Hydroxyl
利用含氮衍生物对羰基的加成反应以降低107胶游离甲醛含量 - Aldehyde hydrogenation reaction can be divided into liquid-phase method and vapor-phase method according to catalyst and feed phase.
醛加氢反应根据使用的催化剂和进料状态不同被分为液相法和气相法。 - The catalytic activity of the compound was investigated. The factors influencing the product yield were discussed, such as the molar ratio of aldehyde to alcohol, the reaction time, the amount and stability of the catalyst.
考察了该化合物的催化活性，研究了醛醇摩尔配比、反应时间、催化剂用量及稳定性等因素对产物收率的影响。 - And it also greatly broadened the synthesis method which only used DMAD and its derivatives as the substrate. Then, we introduced aldehyde in indolizine through Vilsmeier reaction.
这也大大拓宽了以往只是以DMAD及其衍生物为底物的合成方法。 - By changing the reaction time, concentration of hydrochloric acid and various substituted aromatic aldehyde substrate, the reaction was monitored by TLC to study the reaction condition.
通过改变反应时间、盐酸浓度以及不同取代基的底物芳醛，以TLC检测反应过程，来研究反应条件。 - The interaction of amino group in melamine with aldehyde in probe 3 results in the fluorescence enhancement of the reaction mixture.
利用含醛基的荧光探针3能够与三聚氰胺中的氨基发生反应，导致体系的荧光强度增强。 - Amination of aldehyde is not only a very important reaction in building C-N bond, but also an efficient method to synthesize many biologically active natural products and pharmaceutical compounds.
醛的胺化反应是构建C-N键的重要反应，也是合成许多具有活性的天然产物和药物分子的有效方法。 - The condensation-cyclization cascade reaction of aromatic aldehyde with two equiv of 4-hydroxy-6-methyl-pyrone in the presence of acetic anhydride was studied by using ionic liquid as both reaction medium and promoter.
研究了在离子液体介质中，芳香醛和两分子6-甲基-4-羟基吡喃酮在乙酸酐存在下的缩合成环反应，并通过该反应合成了一系列双吡喃酮并吡喃类化合物。