现代化工

现代化工 ›› 2022, Vol. 42 ›› Issue (3) : 183-188. DOI: 10.16606/j.cnki.issn0253-4320.2022.03.037

科研与开发

固体超强酸SO₄^2-/SiO^2-ZrO₂催化合成季戊四醇正辛酸酯的研究

周甲丁, 贡肖, 王志德, 宋昌盛, 高琦, 任庆功

作者信息 +

Catalytic synthesis of pentaerythritol n-octanoate over solid super acid SO₄^2-/SiO^2-ZrO₂

Author information +

文章历史 +

Received		Published
2021-04-10		2022-03-20
Issue Date	Revised Date
2022-03-12	2021-04-10

PDF (3903K)

摘要

通过浸渍法在实验室条件下合成了SO₄^2-/SiO^2-ZrO₂催化剂，并通过TG、XRD、FT-IR、Hammett指示剂、SEM、TEM、BET等对其进行表征。以SO₄^2-/SiO^2-ZrO₂为催化剂催化合成季戊四醇正辛酸酯，经过工艺优化后得到最佳反应条件：反应温度为200℃、正辛酸和季戊四醇的摩尔比为4.2：1、催化剂质量为进料质量的3%、反应时间6 h，反应结束后酯化率高于98%。催化剂重复使用5次后酯化率仍达96.30%。

Abstract

SO₄^2-/SiO^2-ZrO₂ catalyst is synthesized by impregnation method in laboratory,and characterized by TG,XRD,FT-IR,Hammett indicator,SEM and TEMBET.Pentaerythritol n-octanoate ester is synthesized by using SO₄^2-/SiO^2-ZrO₂ as catalyst.The optimum reaction conditions are determined as follows:reaction temperature is at 200℃,the molar ratio of n-octanoate to pentaerythritol is 4.2:1,catalyst mass is 3% of feed mass,and the reaction lasts for 6 h.The esterification rate is higher than 98% after the reaction ends.The esterification rate still reaches 96.30% after the catalyst has been reused for 5 times.