十二烷基硫酸钠的纯化

为得到满足表面化学实验研究规格的十二烷基硫酸钠（以下简称ＳＤＳ），用水结晶、泡沫分离、乙醇三次重结晶、乙醚抽提等方法，对市售的一种Ｃ．Ｐ．级试剂进行纯化处理．就所得结果对各种纯化方法的特点进行比较、分析和讨论，据此提出了一种纯化市售Ｃ．Ｐ．级试剂的方案，并用于另一种市售Ｃ．Ｐ．级试剂的纯化，获得满意的结果．

Purification of sodium dodecyl sulphate

In order to obtain sodium dodecyl sulphate that can meet the requirements of experimen tal research in surface chemistry, a commercial C. P. reagent was further purified, first by crystalliza non from water, then by separation with foam, and then by recrystallization three times from ethanol, and finally by extraction with ether. Results of different ways under different conditions had been compared, analysed and discussed before a plan was decided on to purify another C.P. reagent, and with satisfactory results.