Prospectus

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PPP-7 Distillation with Two Liquid Phases Present Expected Benefit toMembers: This test will help reduce uncertainty in designing towers when two liquid phases are present. Present Situation and Proposed Research: Non-ideal vapor-liquid equilibrium in a separation sometimes can lead to the formation of two liquid phases in a distillation column. Sometimes a two-liquid-phase mixture may be used as reflux to a tower employing azeotropic distillation. There exists no data to show what effect a second liquid phase has on liquid distribution, downcomer performance, tray capacity or efficiency, etc. The experimental unit will be run with two liquid phases present in the tower. Proposed Internals and Test System: Sieve trays using the C6/C7 system and water. Estimated Unit Time: Three weeks. Estimated Additional Costs (Beyond Unit Time): Unknown. Background and Discussion: One problem in selecting a system is that a binary two-liquid-phase system always forms an azeotrope, and no further composition change can occur. A second problem is that Ross-type foaming can occur when the composition of a single-liquid-phase system nears the point of phase separation. This test avoids these complications and concentrates on the physical two-phase hydraulic problems. Traditional Research Idea

PROSPECTUS

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