大宗化学品工业：大宗化学品工业中的膜分离技术？ 膜分离技术可以分为常见的液体处理过程和不太常见的流体分离过程。常见的液体处理过程主要包括反渗透、 纳滤、超滤和微滤；而不太常见的流体分离过程主要包括渗透气化、气/气分离（或称气体渗透）、蒸汽渗透和电渗析。大宗化学品行业的一个关键特征就是它能够涉及到所有的这些膜分离技术，例如从空气中分离单纯的成分气体、水/脱水乙醇混合物的分离，或者是利用超滤和微滤技术回收裂解气中的氢气，这对于其生产操作上的后序步骤有至关重要的作用。 the membrane separation processes to be considered here include the familiar liquid processes: reverse osmosis, nanofiltration, ultrafiltration and microfiltration, but also include the less familiar fluid separation processes of pervaporation, gas/gas separation (or gas permeation), vapour permeation and electrodialysis. a key feature of the bulk chemical sector is that all these membrane separation processes can be found in it, with, for example, the separation of air into its component gases, or the dehydration of ethanol/water azeotropes, or the recovery of hydrogen from cracker gases being as important to their industrial sub-sectors as ultrafiltration or microfiltration are in theirs.查看更多
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