Minimization of volatile organic sulphur byproducts in dimethyl sulfate quaternization of amines made with hypophorous acid
AssigneeAkzo Nobel N.V.
InventorsElliot Band, Maurice Dery, William Joyce, Jeffrey Telschow, Biing Su, Michael Engel, John Nowak, Claude Peterson, Harold Providence, Phuong-Nga Trinh, Sandra Urouhart
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Abstract
The present invention relates to a process for the minimization of volatile organic sulphur byproducts in dimethyl sulfate quaternization of amines made with hypophosphorous acid, which leads to the formation of an odor stable product.
Claims12
A process for the minimization of odor in dimethyl sulfate quaternization of amines made with hypophorous acid which comprises conducting said quaternization in the presence of dimethyl sulfate, wherein said dimethyl sulfate contains less than 20 ppm sulfur dioxide.
A process for preparing an ester quaternary having improved odor profile with comprises esterfying an alkanol amine with fatty acid in the presence of a esterification catalyst/reductive bleaching agent having a standard reduction potential of at least 0.5 volts in order to form an esteramine and thereafter quaternizing said esteramine with dimethylsulfate, wherein said dimethyl sulfate contains less than 20 ppm sulfur dioxide.
Dependencies are inferred from the claim text.