Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (1): 84-91.DOI: 10.11944/j.issn.1000-0518.2016.01.150149

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Microwave Assisted Synthesis of Ethylene Glycol Intercalated Nickel-aluminum Layered Double Hydroxides

GUO Ke,DUAN Weizhuo,WANG Xiaodong,WU Yan,WANG Hao()   

  1. College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu 610500,China
  • Received:2015-04-27 Accepted:2015-10-21 Published:2016-01-05 Online:2016-01-05
  • Contact: WANG Hao
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.201506156), the National Undergraduate Training Programs for Innovation and Entrepreneurship(No.201410615005)

Abstract:

Ethylene glycol(EG) intercalated layered double hydroxide(LDH) can be used as an interlayer catalytic reactor for the esterification of naphthenic acids with EG in oil. However, long synthesis time for EG intercalated LDH limits its further application. In the present investigation, EG intercalated NiAl-LDH was synthesized via a microwave-assisted ion exchange method by the aid of KOH and with nitrate LDH as precursor. The effects of microwave irradiating time and power, and the reaction temperature on the structure of EG intercalated LDH were investigated. XRD, FT-IR and TG-DSC were used to characterize EG intercalated LDHs prepared. Microwave irradiation was found to provide sufficient energy to accelerate the diffusion of exchanging anions into the interlayer and weaken the interaction between the layers and original interlayer anions. As a result, well-crystallized EG intercalated LDH can be synthesized under 550 W microwave irradiation at 120 ℃ for 10 min. The EG intercalated LDH prepared shows similar structure and properties and higher crystallinity as that prepared by conventional method, while the preparation time can be significantly reduced from 12 h to 10 min.

Key words: microwave, ethylene glycol intercalated, layered double hydroxide