Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By plural serial diverse separations
Patent
1994-01-24
1995-08-29
Gibson, Sharon A.
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By plural serial diverse separations
585833, 585864, C07C 700, C07C 710
Patent
active
054462312
ABSTRACT:
The present invention is a method for removing nitrile contaminants from C.sub.5 streams. In particular, a C.sub.5 stream is washed in a countercurrent fashion with a mixture comprising 50% methanol and 50% water to extract the nitriles from the C.sub.5 hydrocarbons into the water-methanol mixture. Propionitrile removal is enhanced by the presence of the methanol in the solvent. An further embodiments include (1) a method for recovering methanol from the extract stream by hydrogenating the nitriles to form amines, converting the amines to ammonium salts by acid treatment and distilling out the methanol and (2) distilling out methanol
itriles from the extract stream, admixing the methanol
itriles with an alkane/alkene/ether stream then distilling the methanol out in a azeotrope with the alkane/alkenes while leaving the nitriles in the ether.
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Arganbright Robert P.
Hearn Dennis
Jones, Jr. Edward M.
Chemical Research & Licensing Company
Gibson Sharon A.
Johnson Kenneth H.
Phan Nhat D.
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