• 反应在装有分馏反应器中进行的,分馏柱能让通过使回流反应器中。

    Reaction is carried out under a fractionating column that allows aldehyde to pass but returns alcohol to the reaction vessel .

    youdao

  • 发光反应机理了简单的探讨,通过测试说明化学发光反应主要发生氧化一步

    The mechanism of such chemiluminescence is discussed in brief and is shown that the chemiluminescence occurs in the step of alcohol oxidized into aldehyde.

    youdao

  • 单质催化剂通过乙二反应合成了乙二

    Butyraldehyde glycol acetal was synthesized from butyraldehyde and glycol by using iodine as catalyst.

    youdao

  • 反应条件下乙二收率可达71.1%。

    Under these conditions, the yield of butyraldehyde glycol acetal is 71.1%.

    youdao

  • 磷酸催化下,葡萄糖乙二经缩反应制备了乙二糖苷,可用化妆品保湿剂。

    Ethylene glycol glycosides, useful as humectant in cosmetics, were prepared by phosphoric acid-catalyzed acetalization of glucose with ethylene glycol.

    youdao

  • 酸性催化剂下,葡萄糖乙二经缩反应制备了乙二糖苷

    Glycol glucoside was prepared from glucose and ethylene glycol in the presence of acid catalyst.

    youdao

  • 机理不同只有1,2加成方式聚乙烯饱和反应

    This mechanism is different from that for the acetalization reaction of polyvinyl alcohol with saturated aldehydes, which has only 1, 2 addition.

    youdao

  • 缩合反应羰基保护通用方法

    Condensation of aldehydes or ketones with alcohols is one of the most common methods for protecting carbonyls.

    youdao

  • 有机化学中,将氧化成芳一类非常重要反应

    In organic chemistry, the oxidation of benzyl halides and benzyl alcohols to aromatic aldehydes and aromatic ketones is an important reaction and of great significance both in theory and in practice.

    youdao

  • 质子溶剂对频纳还原耦合反应也有一定效果

    In aprotic solvents magnesium effects pinacol reductive coupling of aldehydes and ketones.

    youdao

  • 人们普遍认为,氨酸通过形成氢键相连接的中介催化缩合反应

    Proline is believed to catalyse the aldol reaction through a hydrogen-bonded intermediate.

    youdao

  • 活性基团丙基锡粉直接进行亲核加成反应,得到高烯丙基型的存在不利于此反应的进行。

    Aldehyde containing functional groups can react with allyl iodine and tin directly, water is of no advantage to the reaction.

    youdao

  • 异构脱蜡选择性加氢裂化缩合反应用作催化剂活性组分载体

    It can be used as catalyst or catalyst carrier for dewaxing via isomerization, selective hydrogenation, cracking, condensation of alcohol and aldehyde, etc.

    youdao

  • 单质为催化剂,通过丁1,2丙二反应合成了丁1,2丙二

    The butyraldehyde 1, 2-propanediol acetal is synthesized from the acetalization reaction of butyraldehyde and 1, 2-propanediol, and used iodine as catalysis.

    youdao

  • 将聚苯乙烯固载聚乙二用于催化柠檬丙酮缩合反应

    Polystyrene supported polyethylene glycol was used as catalyst in the condensation reaction of citral and acetone, yield of pseudoionone was 77.4%.

    youdao

  • 反应表明丙二转化率主要催化剂表面酸度影响。

    The conversion of propylene glycol was mainly affected by the surface acidity of the catalyst.

    youdao

  • 浓硫酸改性活性炭催化剂,以苯乙二为原料合成苯甲乙二反应条件进行了研究。

    Using concentrated H_2SO_4 modified coal based activated carbon as catalyst, benzylaldehyde glycol acetal was synthesized from benzylaldehyde and glycol.

    youdao

  • 研究紫苏*选择氧化合成紫苏*反应考察了氧化剂负载量、氧化剂用量和反应温度紫苏*产率的影响。

    Synthesis of perillaldehyde via selective oxidation of perilla alcohol by supported CrO3/SiO2 oxidant is studied in this paper.

    youdao

  • 研究紫苏*选择氧化合成紫苏*反应考察了氧化剂负载量、氧化剂用量和反应温度紫苏*产率的影响。

    Synthesis of perillaldehyde via selective oxidation of perilla alcohol by supported CrO3/SiO2 oxidant is studied in this paper.

    youdao

$firstVoiceSent
- 来自原声例句
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定