Distillation: processes – separatory – Addition of material to distilland to inhibit or prevent... – For inhibiting or preventing a polymerization reaction
Reexamination Certificate
2008-04-01
2008-04-01
Manoharan, Virginia (Department: 1764)
Distillation: processes, separatory
Addition of material to distilland to inhibit or prevent...
For inhibiting or preventing a polymerization reaction
C062S120000, C062S617000, C202S158000, C202S185200, C202S186000, C203S009000, C203S049000, C203S087000, C203SDIG021, C562S600000
Reexamination Certificate
active
10658257
ABSTRACT:
A process for rectificatively separating fluids including (meth)acrylic monomers in a rectification column by directly cooling the vapor including (meth)acrylic monomers rising to the top of the rectification column to form top condensate including (meth)acrylic monomers, the condensation space at the top of the column being separated from the region of the rectification column containing the separating internals only by at least one chimney tray from which the top condensate formed is removed from the rectification column, which includes effecting the direct cooling of the vapor in the condensation space in at least two spray zones which are spatially successive and are flowed through by vapor by spraying supercooled top condensate including added polymerization inhibitor, and the temperature of the sprayed supercooled top condensate becoming lower from spray zone to spray zone in the flown direction of the vapor.
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Derwent Publications, AN 2001-293790, XP-002277806, JP 2000-344688, Dec. 12, 2000.
Dams Albrecht
Schroeder Juergen
Thiel Joachim
BASF - Aktiengesellschaft
Manoharan Virginia
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