The process of alkyl naphthalene preparation by alkylation, acylation and direct extraction are also discussed.
讨论了烷基化、 酰基化和直接提取制备烷基萘的工艺路线。
By using stibnite direct preparation of sodium pyroantimonate the new process were studied and satisafactory results were obtained.
介绍以辉锑矿为原料直接制备焦锑酸钠的新工艺。
The paper puts forward a new watering regime of jigging process. It makes coal preparation plants with flotation shops adoptable to direct flotation.
本文给出的新的跳汰流程用水制度将会使所有设有浮选的选煤厂能采用直接浮选工艺。
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