Separation of 4-methyl-2-pentanone from formic acid by extractiv

Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials

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203 56, 203 60, 203 61, 203 62, 203 63, 203 64, 203 65, 562609, 568410, B01D 340, C07C 4583, C07C 5302

Patent

active

049941518

ABSTRACT:
4-Methyl-2-pentanone cannot be easily separated from formic acid by distillation because of the closeness of their boiling points. 4-Methyl-2-pentanone can be readily removed from formic acid by extractive distillation using dimethylamides. Typical effective agents are dimethylformamide; dimethylacetamide and acetyl salicyclic acid; dimethylacetamide, heptanoic acid and methyl benzoate.

REFERENCES:
patent: 3013954 (1961-12-01), Pacoud et al.
patent: 4551208 (1985-11-01), Bott et al.
patent: 4793901 (1988-12-01), Berg et al.
patent: 4840707 (1989-06-01), Berg et al.

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