Process for preparing long chain N,N-dialkylhydroxylamines by di

Details Process for preparing long chain N,N-dialkylhydroxylamines by di Process for preparing long chain N,N-dialkylhydroxylamines by di

1989-06-14

1991-05-07

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

564300, C07C23910

Patent

active

050135104

ABSTRACT:
N,N-Dialkylhydroxylamines where the alkyl groups are of 10 to 30 carbon atoms are prepared by an improved process involving the direct oxidation of the corresponding N,N-dialkylamines with aqueous hydrogen peroxide in a lower alkanol solvent in the absence of a catalyst or a sequestering agent.
The improved process prevents the problem of over-oxidation and gives the desired N,N-dialkylhydroxylamine in high yield and purity. The N,N-dialkylhydroxylamines are effective stabilizers for polymer compositions particularly as process stabilizers for polyolefins.

REFERENCES:
patent: 3243462 (1966-03-01), Smith
patent: 4845290 (1989-07-01), Legrand et al.
patent: 4876300 (1989-10-01), Seltzer et al.
patent: 4898901 (1990-02-01), Ravichandran et al.
R. W. Murray et al., Synthetic Communications, 19, 3509, (1989).
S-I Murahashi et al., J. Org. Chem., 1990, 55, 1736.

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