Recovery of aprotic amides
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United States of America Patent
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Feb 23, 1982
Issued Date -
N/A
app pub date -
May 22, 1978
filing date -
Jan 31, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to the recovery of three aprotic amide solvents from their water solutions by extraction with a selected class of organic solvents characterized generally by having two electron withdrawing substituents, exemplified by fluorine and chlorine, located on a carbon atom which also contains a hydrogen atom.
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