Process for separating medium boiling substances from a mixture of low, medium and high boiling substances
AssigneeBASF SE
InventorOtto Watzenberger
Life of this patent
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Abstract
A process for separating a fraction containing low and middle boilers from a mixture of low, middle and high boilers, which involves treating the mixture in a column with low-boiler vapor in the bottom, so that the middle-boiling component accumulates in the low-boiler vapor and can be obtained at the temperature level of the low-boiling component.
Claims9
A process for separating a fraction containing low and middle boilers (L,M fraction) from a homogeneous mixture comprising low, middle and high boilers (L,M,H mixture), which process comprises supplying the L,M,H mixture to the top of a treating column, treating the L,M,H mixture with low-boiler vapor L in the bottom of the treating column and separating the L,M,H mixture into an L,M fraction and a fraction having low and high boilers (L,H fraction), wherein the treating column is a stripping column and wherein the L,M fraction is taken off at or above the level at which the L,M,H mixture is supplied to the treating column while the L,H fraction is taken off at the bottom of the treating column.
Dependencies are inferred from the claim text.