改良西门子法制备多晶硅存在的技术瓶颈是大量副产物四氯化硅难以回收利用。
It is difficult to recycle a large amount of by product, silicon tetrachloride, which is the technical bottleneck existing in preparation of polycrystalline silicon by improved Siemens process.
通过刮膜蒸发器脱重和高精密精馏的方法对羰基化制备乙酸工艺副产物-重组分残液回收进行了实验。
Recovery of the residue liquid from the process for carbonylation of methanol to acetic acid was studied experimentally.
通过对环己烷氧化副产物轻质油、X油成分的分析及部分实验，提出回收利用副产物的一些工艺方法，并介绍了氧化环己烯、正戊醇等的工业应。
Analyses light-oil and X oil contents which is Oxidation by-product of cyclohexane, puts forward some process methods utilized by-product.
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