Rohm and Haas Company;Dow Global Technologies, LLC
发明人:
WORLEY, William G.,HOY, Stacy W.
申请号：
EP20160820070
公开号：
EP3390342(A1)
申请日:
2016.12.08
申请国别(地区):
欧洲专利局
年份:
2018
代理人:
摘要：
A process for purifying methyl methacrylate by (a) feeding a mixture comprising methyl methacrylate and its alkali salt into a distillation column above the middle along with a hydrocarbon; (b) removing a first overhead stream; (c) removing a first bottoms stream; (d) feeding the first overhead stream to a first water separator to produce (i) a first organic phase and (ii) a first aqueous phase which enters a methanol drying column which produces a second overhead stream and a second bottoms stream; (e) feeding the first bottoms stream to a second water separator to produce (i) a second aqueous phase which is fed to an MMA stripper column which produces a third overhead stream and a third bottoms stream, and (ii) a second organic phase; (f) combining the second organic phase and the second bottoms stream into a third water separator which produces a third organic phase which enters an MMA drying column which produces a fourth bottoms stream, and (g) feeding the fourth bottoms stream to an MMA product column.
