查询词典 sulfoacid

It not only can prepare substituted arylamine sulfoacid with high-quality and high-yield, but also can easily control reaction temp., and reduce reaction temp..

所说的方法不仅能高质量、高产率地制备取代芳胺磺酸，而且由于在有机溶剂中进行反应，可非常容易地控制反应温度，并可降低反应温度。

Some physical and chemical targets of black sulfoacid were analysed. Application of bIack sulfoacid have been investigated.

本文对黑磺酸的部分理化指标进行了分析，在利用黑磺酸方面做了一些探索。

Said invention utilizes the control of sulfonation extent of polystyrene sulfoacid membrane and distribution of sulfoacid group to implement modification or polystyrene sulfoacid membrane, on the primise of that the protein conductivity of the membrane is not affected, the permeability of the methyl alcohol in the membrane is reduced, and the alcohol-resistance of membrane material is raised.

通过控制聚苯乙烯磺酸膜的磺化程度和磺酸基团的分布状况来对聚苯乙烯磺酸膜进行改性，在不影响膜的质子传导性能的前提下，降低了甲醇在膜内的渗透率，提高了膜材料的阻醇性能。

Some typical newly catalysts, such as sulfoacid, inorganics, solid superacids, etc on the reaction of p-hydroxybenzoic esters was summed up especially introduce heteropoly acid catalyst.

总结了磺酸、无机物、固体超强酸等几种典型的合成对羟基苯甲酸酯反应的新型催化剂，重点介绍了杂多酸催化合成对羟基苯甲酸酯。

The present invention uses industrial polystyrene as raw material, under the protection of inert gas uses complex of acidylating agent and concentrated sulfuric acid as sulfonating agent to make sulfonation, and utilizes dector-blade casting process or other membrane-forming process to prepare polystyrene sulfoacid membrane with low sulfonation degree.

本发明涉及电化学的燃料电池技术，更具体是指低温直接甲醇燃料电池用聚苯乙烯磺酸膜及其制备方法。本发明是以工业级的聚苯乙烯为原料，在惰性气体保护下以酰化剂与浓硫酸的络合物作磺化剂，进行磺化，并通过流延法或者其它成膜方法制备低磺化度的聚苯乙烯磺酸膜。

Butyl p-hydroxybenzoate was synthesized from p-hydroxybenzoic acid and butanol with sulfoacid resin as catalyst. The optimum conditions were as follow: ratio of n-butanol, p-hydroxybenzoic acid and sulfonic acid resin was 0.25 mol ∶ 0.05 mol ∶ 1.5 g, refluxing for 5 h using water separator at the reflow reaction temperature.

摘 要：以对羟基苯甲酸和丁醇为原料，用磺酸树脂作催化剂，催化合成了尼泊金丁酯，优化反应条件为：n∶ n=5 ∶ 1，催化剂磺酸树脂的用量为对羟基苯甲酸质量的21%，反应温度为回流温度，反应时间为5 h。

The eluate was prepared by dissolving am- monium formate 6.3 g and octanen sulfoacid sodium 1.0 g in 700 mL water(pH 3.8 adjusted with formic acid)and subsequently diluted with water to 1000 mL.

结果：在本色谱条件下腺苷蛋氨酸与辅料、溶剂峰及其有关物质的分离度符合要求，在200～600μg·mL~(-1)范围内线性良好(r=0.9998)。回收率为99.61%～99.98%，RSD为0.23%～1.3%。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。