Separation of n-propyl acetate from n-propanol by extractive dis

Details Separation of n-propyl acetate from n-propanol by extractive dis Separation of n-propyl acetate from n-propanol by extractive dis

1984-12-14

1986-06-03

Bashore, S. Leon

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 57, 203 59, 203 60, 203 64, 560248, B01D 340

Patent

active

045928053

ABSTRACT:
n-Propyl acetate cannot be completely removed from n-propyl acetate - n-propanol - water mixtures by distillation because of the presence of the minimum ternary azeotrope. n-Propyl acetate can be readily removed from mixtures containing it, n-propanol and water by using extractive distillation in which the extractive distillation agent is a higher boiling oxygenated, nitrogenous and/or sulfur containing organic compound or a mixture of these. Examples of effective agents are N,N-dimethylacetamide; acetamide and triethylene glycol; acetamide and N,N-dimethylacetamide and triethanolamine.

REFERENCES:
patent: 1854385 (1932-04-01), Van Schaack, Jr.
patent: 2386927 (1945-10-01), Boyd, Jr.
patent: 2822409 (1958-02-01), Gwynn
patent: 2993841 (1961-07-01), Sarno
patent: 4379028 (1983-04-01), Berg et al.
patent: 4507176 (1985-03-01), Berg et al.
Chemical Abstracts, Tunik et al, "Structure of Phase Equilibrium Diagrams in Systems with Esterification", vol. 92, 1980, p. 416.
Chemical Abstracts, Cepeda, "Separation by Ext. Dist. of Mixt. of Alcohols and Their Acetic Acid Esters", vol. 103, 1985.

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