Process for preparing tert-amine oxides

Details Process for preparing tert-amine oxides Process for preparing tert-amine oxides

1990-10-01

1992-07-14

Hollrah, Glennon H.

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

Organic compounds

Amino nitrogen containing

564297, C07C29100

Patent

active

051304880

ABSTRACT:
Discrete tert-amine oxides, including non-hygroscopic tert-amine oxide dihydrates, are prepared by (A) reacting a concentrated aqueous hydrogen peroxide with a tert-amine corresponding to the formula RR'R"N in which R is a primary alkyl group containing 8-24 carbons; R' is methyl, ethyl, or 2-hydroxyethyl; and R" is independently selected from methyl, ethyl, 2-hydroxyethyl, and primary alkyl groups containing 8-24 carbons in a reaction mixture which is maintained stirrable throughout the reaction by the use, at least during the latter part of the reaction, of an organic solvent which solubilizes the reaction mixture at the reaction temperature but permits precipitation of the tert-amine oxide at a lower temperature and (B) adjusting the water content of the product, if necessary, to achieve a water/tert-amine oxide mol ratio not higher than about 2.1/1 before recovering the tert-amine oxide.

REFERENCES:
patent: 3275673 (1966-09-01), Barlow
patent: 3776959 (1973-12-01), Stalioraitis et al.
patent: 4247480 (1981-01-01), Murata et al.
patent: 4659565 (1987-04-01), Smith et al.
patent: 4748275 (1988-05-01), Smith et al.
patent: 4942260 (1990-07-01), Laurenzo et al.
Ruppert, W., "Amine Oxides", CA 55, 17501 i, 1961.
Ochiai, E., Aromatic Amine Oxides, Chap. 2, sec. 2.1.1, pp. 6-7, 1967.

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