RECOVERY METHOD AND RECOVERY APPARATUS OF NITRILE-BASED MONOMER
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United States of America Patent
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Issued Date -
Nov 3, 2022
app pub date -
Jul 9, 2021
filing date -
Jul 9, 2021
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Abstract
Disclosed is a recovery method of a nitrile-based monomer including: supplying a feed stream including a nitrile-based monomer, a nitrogen compound, and water to a first distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; condensing the upper discharge stream of the first distillation tower and supplying the condensed stream to a decanter to separate the stream into a water layer and an organic layer; supplying an organic layer stream discharged from the decanter to a second distillation tower to separate the stream into a lower discharge stream and an upper discharge stream; and splitting a part of the upper discharge stream from the second distillation tower and refluxing the split stream to the second distillation tower.
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