固体酸催化合成二丙二醇和三丙二醇的研究  

Synthesis of dipropylene glycol and tripropylene glycol over solid acid catalyst

作　　者：汪宝和[1] 段晨飞 张照邦 马静[1] 朱璟[1] WANG Baohe;DUAN Chenfei;ZHANG Zhaobang;MA Jing;ZHU Jing(Key Laboratory for Green Chemical Technology of Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学化工学院绿色合成与转化教育部重点实验室,天津300072

出　　处：《化学工业与工程》2024年第4期45-54,共10页Chemical Industry and Engineering

摘　　要：在固体酸催化作用下,对环氧丙烷(PO)与丙二醇(PG)合成二丙二醇(DPG)和三丙二醇(TPG)进行了研究。研究表明H-ZSM-5分子筛催化活性明显高于H-13X分子筛,消除了内外扩散的影响后,建立了H-ZSM-5分子筛催化作用下的反应动力学模型,利用数值分析法确定了反应动力学常数。实验结果表明,计算值与实验值吻合较好。通过反应动力学数学模型优化了反应条件,为二丙二醇和三丙二醇的工业化生产提供了基础的物性数据。采用X射线衍射、N_(2)吸附和脱附测试、吡啶吸附红外光谱(Py-FTIR)等方法分别对新制备的和使用过的催化剂进行了表征,并对失活原因进行了初步探索。The synthesis of dipropylene glycol(DPG)and tripropylene glycol(TPG)from propylene ox-ide(PO)and propylene glycol(PG)under the catalysis of solid acid was studied in a stainless steel high-pressure batch reactor.The study showed that the catalytic activity of H-ZSM-5 molecular sieve was significantly higher than that of H-13X molecular sieve.After eliminating the influence of internal and ex-ternal diffusion,the kinetic model of H-ZSM-5 molecular sieve catalyzed reaction was established and the reaction kinetic constants were determined by numerical analysis.The experimental results show that the calculated values agree well with the experimental ones.The reaction conditions were optimized by the mathematical model of reaction dynamics,which provided basic physical data for the industrial production of dipropylene glycol and tripropylene glycol.The fresh and used catalysts were characterized by X-ray diffraction,N_(2) adsorption and desorption measurement,Pyridine asorption FTIR,and the cause of deacti-vation was preliminarily explored.

关 键 词：环氧丙烷(PO) 丙二醇(PG) 二丙二醇(DPG) 三丙二醇(TPG) H-ZSM-5 反应动力学 

分 类 号：O643.12[理学—物理化学]