| 摘要 |
The invention is meant for organic chemistry and is applicable in production of the base material for disinfectant, detergent, antibacterial, antiseptic preparations and household chemical goods. A mixture of straight-run tertiary amines or a mixture of commercial tertiary amines is subject to rectification at the atmospheric pressure or under vacuum from 0.1 to 1.0 kPa. The top tray temperature is from about 80 DEG C to about 130 DEG C. The still temperature is from about 130 DEG C to about 310 DEG C. The reflux in the amount from 0 to 100% is supplied for the column irrigation, and the remaining part of the reflux is tapped out as the end product. The derived refined mixture of tertiary amines consists of dodecyl dimethylamine and tetradecyl dimethylamine, the content of impurities does not exceed 11 mass percent, and is free from heavy fractions of alkyldimethylamines with the alkyl radicals C16 and more. The content of dodecyl dimethylamine and tetradecyl dimethylamine is additionally controlled by the amount of the reflux, and, if required, several rectification cycles are carried out. The method is simple and cost-effective. Cheap and readily available raw materials are used, 3 claims, 1 tabl., 1 emb.
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