乙撑双硬脂酰胺的合成新工艺

研究以乙二胺和硬脂酸为主要原料,在常压下一步法制备乙撑双硬脂酰胺,通过添加抗氧剂解决了产品颜色发黄的问题。实验结果表明最佳工艺条件为:n(硬脂酸):n(乙二胺)=1:0.57;乙二胺滴加温度100℃,滴加时间40～60min;反应温度200℃;反应时间4～5h;催化剂为磷酸其用量为硬脂酸质量的0.5%;抗氧剂的用量为硬脂酸质量的0.4%。抗氧剂的加入能够显著提高产品的颜色。

New Process for the Synthesis of Ethylene Bis Stearamide

In the study,with ethylene diamine and stearic acid as raw material,ethylene bis stearamide were prepared by adding antioxidant to solve the problem of yellow color,at normal pressure.Experimental results showed that the optimum technology condition were as follows：n（stearic acid）：n（Ethylenediamine）=1：0.57;the temperature and rang of time of ethylenediamine dropping were 100 ℃ and 40～60 min;the optimum temperature and rang of time of reaction were 200 ℃ and 4～5 h;phosphoric acid as the catalyst for the dosage of the quality of the stearic acid 0.5 %;antioxidant for the dosage of the quality of the stearic acid 0.4 %.Antioxidant can significantly improve the color of product.