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Preparation method of dodecyl dimethyl benzyl ammonium bromide

 Last Update: 2022-01-04
 Source: Internet
 Author: User

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Dodecyl dimethyl benzyl ammonium bromide

[Alias] Benzalkonium Bromide, Promethazine

[Structural formula]

[Physical and chemical properties] Colorless or light yellow solid or colloidal liquid, easily soluble in water or ethanol , with aromatic odor, extremely bitter taste, cleansing and sterilization

[Preparation method] Dodecyl bromide is prepared from dodecanol and hydrogen bromide in the presence of sulfuric acid, and then ammonium is formed with dimethylbenzylamine

Add lauryl alcohol into a glass-lined reaction tank, slowly add sulfuric acid under stirring and cooling conditions, and add hydrobromic acid after 1 hour

Add dimethylbenzylamine to a glass-lined reactor filled with bromododecane , stir and heat to 80°C, then let the reactant naturally heat up to 110°C, cool, and control the temperature to continue to rise

The process flow is shown in Figure 7-18

Figure 7-18 Preparation process of dodecyl dimethyl benzyl ammonium bromide

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