Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1980-04-07
1982-04-20
Hines, Robert V.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
C07C 8526
Patent
active
043260829
ABSTRACT:
Triethylamine and water are simultaneously removed from solutions in organic solvents, by liquid/liquid extraction with concentrated aqueous solutions of (C.sub.2 H.sub.5).sub.3 N.H.sub.3 PO.sub.4 which preferably contain free phosphoric acid as well. Upon heating of the resulting extract, the water and amine taken up are boiled off and the extractant regenerated. The method is of particular value in the preparation of aqueous coating compositions comprising reaction products of polyether epoxides and H.sub.3 PO.sub.4 in organic media. The reaction product is salified with triethylamine in excess, in the presence of added water. The organic solvent is boiled off, together with the excess amine and some of the water, to form an aqueous dispersion of the salified product and a distillate which can be processed by the method of the invention. The recovered solvent, water and amine may be recycled.
REFERENCES:
patent: 3470252 (1969-09-01), Doyle et al.
patent: 3855298 (1974-12-01), Bathellier et al.
patent: 3864402 (1975-02-01), Swanson et al.
patent: 4152219 (1979-05-01), Newton et al.
Martin Patrick H.
Michaels Stephen L.
Hines Robert V.
Stringham R. R.
The Dow Chemical Company
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