Study on Catalytic Synthesis of Low Molecular Weight Polyether Polyol by Composite Alkaline Earth Metal. Issue 1 (March 2020)

• Record Type: Journal Article
• Authors: Li, Shuo; Gu, Zhenggui; Wang, Kaijun; Cao, Xiaoyan; Liu, Yacheng; Wang, Can
• Is Part Of: IOP conference series. Volume 453:Issue 1(2020)
• Publication Date: 2020-03
• Subjects: Low molecular weight -- Polypropylene glycol -- Alkoxylation -- BaO/MgO/γ-Al2O3 -- Solid base -- Single factor experiments -- Response surface methodology; Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/453/1/012083
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Polyether Polyol is one of the main intermediates in the synthesis of polyurethane. This research work investigated the optimization of polyether polyol from propylene oxide using Single Factor Experiments and Response Surface Methodology (RSM) through composite alkaline earth metal catalyst (BaO/MgO/γ-Al2 O3 ). The BaO/MgO/γ-Al2 O3 catalyst was prepared with alkaline earth metal oxide immobilized on γ-Al2 O3 by co-precipitation method. The preparation conditions of the catalysts is calcination temperature=600 °C, n(Ba):n(Al)=0.1:1, n(Mg):n(Al)=0.3:1. Represented with XRD, SEM, BET, CO2 -TPD, etc. Characterization results showed that the catalysts indicated strong basic site, perfect particle surface area, pore volume, pore size and relatively uniform particle size distribution. Batch analyses demonstrated that the polyether molecular weight and the epoxide conversion was highly influenced by different process factors which include reaction temperature, pressure, time and the amount of catalyst. The conversion of propylene oxide and molecular weight to target product reached almost 63.5% and 600, respectively under the conditions of reaction temperature 190 °C, pressure 2 MPa, time 6 h and catalyst dosage 6%.