This direct contact gas hydrate cold storage installation is composed of a refrigerating system, a viewable hydrate reaction tank, a viewable hydrate storage tank and a cold releasing terminal system.
直接接触式气体水合物蓄冷实验台包括制冷系统，可视化水合物反应罐，可视化水合物储存罐和空调末端放冷系统。
However, alkyl-substituted propargylic dithioacetals could be synthesized by the displacement reaction of the corresponding terminal alkynes with alkyl iodides.
烷基取代的炔丙基硫缩酮衍生物，则能利用相对应的末端炔和碘烷亲电基进行取代反应所获得。
The terminal allylation reaction was studied which was influenced by reaction time, reaction temperature, category and dosage of allylation reagent and molecular weight of polyether.
其次对双羟基聚醚的端烯丙基化反应进行研究，讨论了反应时间、反应温度、聚醚分子量、烯丙基化试剂的种类和用量对反应的影响。
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