Process for reducing the aldehyde concentration in a mixture...

Distillation: processes – separatory – Distilling to separate or remove only water – From organic compound

Reexamination Certificate

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Details

C203S036000, C203S037000, C203S079000, C203S080000, C564S502000, C568S420000

Reexamination Certificate

active

07601245

ABSTRACT:
The invention relates to a process for reducing the aldehyde concentration in a mixture comprising cyclohexanone and one or more aldehydes, said process comprising distilling said mixture in a distillation column in the presence of an alkaline compound, wherein in the bottom of the distillation column substantially no water is present.

REFERENCES:
patent: 3668256 (1972-06-01), Brundege
patent: 4559110 (1985-12-01), Swearingen et al.
patent: 4722769 (1988-02-01), Chan et al.
patent: 5667644 (1997-09-01), Mori et al.
patent: 6387224 (2002-05-01), Pinkos et al.
patent: 6444096 (2002-09-01), Barnicki et al.
patent: 1 382 849 (1975-02-01), None
patent: 2 028 329 (1980-03-01), None

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