Recovery of acrylic acid from process or waste water streams
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United States of America Patent
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-
Jan 30, 2001
Grant Date -
N/A
app pub date -
Jan 14, 1999
filing date -
Feb 3, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a method for recovering acrylic acid from process or waste water streams in which the stream is vaporized and contacted with a liquid high boiling solvent for acrylic acid, thereby absorbing acrylic acid into the solvent. Mixed trialkylphosphine oxides are a preferred solvent. Acrylic acid is stripped from the solvent with heat and, optionally, stripping gas. It may be separated from any accompanying materials to produce acrylic acid of high purity.
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