二元催化剂在脂肪酸甲酯乙氧基化物FMEE合成中的应用

Application of Binary Catalyst in Synthesis of Fatty Acid Methyl Ester Ethoxylates(FMEE)

脂肪酸甲酯乙氧基化物具有良好的生物降解性和优秀的抗硬水能力,低泡沫易漂洗,与醇醚类非离子表面活性剂有很好协同互补作用。以十六碳脂肪酸酯与环氧乙烷为原料,在几种不同类型的催化剂作用下采用一步法直接合成FMEE,对催化剂的诱导期、产品的转化率、多聚醇与二噁烷含量、平均分子量进行了考察,最终确定了四氯化锡和冠醚是脂肪酸甲酯乙氧基化物合成有效的催化剂,以四氯化锡和冠醚组成二元催化剂在140℃温度下能得到转化率70%的FMEE。

Fatty acid methyl ester ethoxylates have good biodegradability,excellent hard water resistance,low foam and easy rinsing,and good synergistic and complementary effects with alcohol-ether non-ionic surfactants.FMEE was synthesized directly in one step using hexadecane fatty acid ester and ethylene oxide as raw materials and several different types of catalysts.The induction period of the catalyst,the product conversion rate,the content of polyols and dioxanes,and the catalyst's average molecular weight were all investigated.Finally,it was discovered that stannic chloride and crown ether were effective catalysts for the synthesis of FMEE,and that using stannic chloride and crown ether as binary catalysts at 140℃resulted in a conversion rate of 70%FMEE.