Neutral oil recovery process for the production of naphthenic acids
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United States of America Patent
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Apr 30, 1991
Grant Date -
N/A
app pub date -
Jan 16, 1990
filing date -
Jan 16, 1990
priority date (Note) -
Expired
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Abstract
A process for treating naphthenic fractions with a caustic blend of sodium and potassium hydroxide, preflashing the naphthenic fraction to remove water and then flashing the dewatered fraction to remove the neutral oils and the materials that were not formed into the acid salts. The naphthenic salt mixture is then quenched and acidified so as to recover the naphthenic acids. Naphthenic acids recovered from the process of the present invention have acid numbers which are generally higher than the naphthenic acids heretofore produced from the corresponding feed streams. The process provides for the flashing of the water which otherwise would cause foaming and not permit the recovery of the acid salt for the enhanced separation of the naphthenic acids.
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