一种非离子表面活性剂合成工艺的研究

doi:10.13218/j.cnki.csdc.2017.02.003

摘要/Abstract

摘要： 以硝酸镁晶体和硝酸铝晶体为原料,在弱碱性条件下,通过共沉淀法合成出具有水滑石类结构的含Mg-Al基复合物酸/碱双活性位催化剂。该催化剂经过花生酸改性后,用XRD、NH₃-TPD和CO₂-TPD测试表征发现,改性后的催化剂相比未改性的在性能方面有明显提高。通过固定床反应器对醋酸丁酯的乙氧基化催化工艺进行了研究,结果表明自制Mg-Al基复合物酸/碱双活性位催化剂经过花生酸改性后反应活性明显提高,产物乙二醇丁醚醋酸酯1-EBAC和2-EBAC含量显著增大,产品分布变窄。

关键词: 非离子表面活性剂, 乙二醇丁醚醋酸酯, 水滑石, 固定床

Abstract: A catalyst containing Mg-Al composite with both acidic and basic activities and structure similar to that of hydrotalcite was prepared by co-precipitation method under weak alkaline condition using magnesium nitrate crystal and aluminum nitrate crystal as starting materials.The prepared catalyst,after modified with arachidic acid was tested and characterized by X-ray diffraction (XRD),NH₃-temperature programmed desorption (NH₃-TPD) and CO₂-TPD.Then the modified catalyst was applied in ethoxylation of butyl acetate with a fixed bed reactor.Results showed that the prepared and modified catalyst displays conspicuous enhancement of activity for the conversion.The content of targeted products,ethylene glycol butyl ether acetate 1-EBAC and 2-EBAC is higher as well as their carbon number distribution is narrower.

Key words: nonionic surfactant, ethylene glycol butyl ether acetate (EBAC), hydrotalcite, fixed bed

中图分类号:

TQ423.2

张金昌, 赵宏斌, 孟岩, 富扬, 刘兆滨, 朱建民. 一种非离子表面活性剂合成工艺的研究[J]. 日用化学工业, 2017, 47(2): 73-76.

ZHANG Jin-chang, ZHAO Hong-bin, MENG Yan, FU Yang, LIU Zhao-bin, ZHU Jian-min. Synthesis of a kind of nonionic surfactant with a modified catalyst[J]. China Surfactant Detergent & Cosmetics, 2017, 47(2): 73-76.

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