Mineral oils: processes and products – Fractionation – Liquid extraction with solvents
Patent
1989-12-29
1991-04-16
Davis, Curtis R.
Mineral oils: processes and products
Fractionation
Liquid extraction with solvents
C10G 2128
Patent
active
050080040
ABSTRACT:
Processes are disclosed for the recovery of aromatic extraction solvent from the raffinate phase of aromatic extraction processes. The raffinate phase is washed with water that is obtained in part by condensing a portion of the steam generated for stripping aromatics from the extract phase. The remaining portion of the raffinate wash water is provided by steam from a steam generation zone. The processes are especially useful when the feed contains relatively large amounts of non-aromatics and therefore produces a large raffinate stream. Disclosed solvents include sulfolane-type solvents, polyalkylene glycols, glycol ethers and mixtures thereof.
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Bentham Martin F.
Maier William H.
Davis Curtis R.
McBride Thomas K.
Tolomei John G.
UOP
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