Citation: SUN Caiying, REN Biaobiao, DONG Tianhe, DAI Qiubo, XIAO Bo. Optimal Activation Temperature of γ-Al₂O₃ for Catalytic Synthesis of Poly(oxy-1, 2-ethanediyl) methylphosphonate[J]. Chinese Journal of Applied Chemistry, ;2020, 37(3): 307-313. doi: 10.11944/j.issn.1000-0518.2020.03.190233 shu

Optimal Activation Temperature of γ-Al₂O₃ for Catalytic Synthesis of Poly(oxy-1, 2-ethanediyl) methylphosphonate

a.
Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials, College of Chemistry, Chemical Engineering and Resource Utilization/Northeast Forestry University, Harbin 150040, China
b.
School of Landscape Architecture; Northeast Forestry University, Harbin 150040, China
c.
Chifeng Product Quality and Mearurement Inspect Institute, Chifeng, Inner Mongolia 024000, China

Corresponding author: DONG Tianhe, 694130920@qq.com
Received Date: 3 September 2019
Revised Date: 25 November 2019
Accepted Date: 13 December 2019

Fund Project: the Fundamental Research Funds for the Central Universities 2572018BK04Supported by the Fundamental Research Funds for the Central Universities(No.2572018BK04)1

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Poly(oxy-1, 2-ethanediyl) methylphosphonate(PEMP) as a good flame retardant has lots of benefits such as non-toxic, low smoke, high phosphorus content and better flame retardant effects. γ-Al₂O₃ is a good catalyst for the condensation of ethylene glycol (EG) and dimethyl phosphate (DMMP) to produce PEMP. However, since γ-Al₂O₃ is easy to absorb CO₂ and water to reduce its catalytic activity, activation is needed before use. The activation temperature affects the catalytic activity of γ-Al₂O₃. In this paper, γ-Al₂O₃ was activated at different temperatures from 300, 400, 500, 600, 700 and 800℃. γ-Al₂O₃ crystal form was analyzed by X-ray difraction (XRD) and its specific surface area, pore diameter and pore volume were measured by Brunauer-Emmett-Teller (BET) method. The change of infrared absorption was analyzed by Fourier transfer infrared (FTIR). The relative contents of Brønsted acid and Lewis acid sites in γ-Al₂O₃ were determined by pyridine adsorption-FTIR. The purity and viscosity of PEMP catalyzed by γ-Al₂O₃ were compared, and the optimal activation temperature of γ-Al₂O₃ was found to be 400, 500 and 600℃. At this time, γ-Al₂O₃ is a typical γ-Al₂O₃ with large specific surface area and small pore diameter, and the obtained PEMP product has the highest purity.
- poly(oxy-1, 2-ethanediyl)methylphosphonate,
- γ-Al₂O₃,
- activation temperature,
- catalyzed activity
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沈阳化工大学材料科学与工程学院沈阳 110142

Optimal Activation Temperature of γ-Al2O3 for Catalytic Synthesis of Poly(oxy-1, 2-ethanediyl) methylphosphonate

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通讯作者: 陈斌, bchen63@163.com

Optimal Activation Temperature of γ-Al₂O₃ for Catalytic Synthesis of Poly(oxy-1, 2-ethanediyl) methylphosphonate