Recovery of amines from emulsions

Details Recovery of amines from emulsions Recovery of amines from emulsions

1998-03-27

2000-04-04

Barts, Samuel

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C20900

Patent

active

060463627

ABSTRACT:
The instant invention is directed to a method for recovering surface active amines from an emulsion comprising the salt of the amine comprising (a) contacting an emulsion layer or phase containing surface active amine salt with an acid selected from the group comprising mineral acids and carbon dioxide in an amount sufficient and under conditions to produce an amine salt of said mineral acid or an amine bicarbonate, wherein said surface active amine salt is produced via emulsion fractionation with said surface active amine (b) separating an upper layer and a lower aqueous layer; (c) adding, to the lower aqueous layer, an inorganic base if step (a) utilizes a mineral acid, or heating at a temperature and for a time sufficient if step (a) utilizes carbon dioxide, to raise the pH of the aqueous layer to greater than or equal to 8; (d) blowing gas through said aqueous layer to produce a foam containing said surface active amine; (e) recovering said foam containing said surface active amine.

REFERENCES:
patent: 2424158 (1947-07-01), Fuqua et al.
patent: 4752381 (1988-06-01), Ferguson et al.

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