Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials
Patent
1989-07-14
1991-02-19
Bascomb, Wilbur
Distillation: processes, separatory
Adding material to distilland except water or steam per se
At least two materials
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.
Bentu George
Berg Lloyd
Bascomb Wilbur
Berg Lloyd
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