Octadecyldimethyl tertiary amine is a white waxy solid, soluble in alcohol but insoluble in water. It is composed of octadecylamine, formaldehyde and formic acid through condensation be made of.
The production and preparation method of octadecyldimethyltertiary amineis as follows :
It is produced by the condensation of octadecylamine, formaldehyde and formic acid. First add octadecylamine into the reactor, stir evenly in the ethanol medium, control the temperature at 50-60°C, add formic acid, stir for a few minutes, add formaldehyde at 60-65°C, raise the temperature to 80-83°C, and reflux for 2 hours. , neutralize with liquid alkali to make the pH value greater than 10, let it stand for layering, remove water, distill under reduced pressure to remove ethanol, and then cool it to obtain N, N-dimethyloctadecylamine.
In addition, there are also methods of directly synthesizing higher alcohols and dimethylamine. Use stearyl alcohol and dimethylamine in the presence of a catalyst to perform catalytic amination in the liquid phase at 180-220°C to remove a molecule of water to obtain crude tertiary amine, which can be distilled under reduced pressure to obtain high-purity N, N -Dimethyloctadecylamine�
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