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.
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。
3
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.