发明名称 Process for recovering acrylonitrile or methacrylonitrile
摘要 A process for the recovery of acrylonitrile or methacrylonitrile from an aqueous solution comprising subjecting the said solution to a water extractive distillation by feeding the solution to a distillation column and performing said extractive distillation and using solvent water introduced at the top of said column, removing a first overhead vapor stream of acrylonitrile or methacrylonitrile with some water from the top of the column, and a first liquid stream containing water and impurities from the bottom of the column, the contents of said column maintained at a substantially neutral pH by adding a sufficient amount of at least one alkaline compound selected from ammonium carbonate, ammonium bicarbonate, ammonium carbamate, and alkylene diamines to the overhead decanter and/or to the solvent water.
申请公布号 US2004181086(A1) 申请公布日期 2004.09.16
申请号 US20030736387 申请日期 2003.12.15
申请人 GODBOLE SANJAY P.;CESA MARK C. 发明人 GODBOLE SANJAY P.;CESA MARK C.
分类号 C07C253/26;C07C253/34;C07C255/08;(IPC1-7):C07C253/34 主分类号 C07C253/26
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