Chinese Journal of Applied Chemistry ›› 2016, Vol. 33 ›› Issue (6): 649-654.DOI: 10.11944/j.issn.1000-0518.2016.06.150378

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Synthesis of Benzaldehyde Glycol Acetal Catalyzed by Aluminum Dihydrogen Tripolyphosphate Supported on Modified Activated Carbon

HUANG Runjuna,ZHOU Jiatianb,XIE weic,CHEN dongliana,WEI dongpingb,YUAN Aiqunb*(),LIANG Huib   

  1. a Guilin University of Technology at Nanning,Nanning 530001,China
    b College of Chemistry and Chemical Engineering,Guangxi University for Nationalities,Nanning 530006,China
    c Guangxi Vocational & Technical Institute of Industry,Nanning 530004,China
  • Received:2015-10-27 Accepted:2016-01-13 Published:2016-06-01 Online:2016-06-01
  • Contact: YUAN Aiqun
  • Supported by:
    Supported by Guangxi Scientific and Technological Development Projects(No.14125002-6), Nanning City Science and Technology Development Projects(No.20145201), Project of Guangxi Department of Education(No.2013YB105, No.200103YB041), Project of Guangxi Vocational & Technical Institute of Industry

Abstract:

Benzaldehyde glycol acetal was synthesized by aluminum dihydrogen tripolyphosphate supported on nitric acid modified activated carbon. The effect of the molar ratio of alcohol to aldehyde, catalyst amount and reaction time on the yield were studied by single-factor experiments. Orthogonal design was used to obtain the optimized conditions for the synthesis of benzaldehyde glycol acetal. The results show that the three main influencing factors are in the order as follows: the molar ratio of alcohol to aldehyde>the reaction time>the quantity of water carrying agent>the quantity of catalyst. The optimal technical conditions are:temperature 110 ℃, benzaldehyde 0.2 mol, the molar ratio of alcohol to aldehyde is 2.5, reaction time 75 min, the quantity of catalyst 4%, water-carrying agent of cyclohexane 25 mL. Under these conditions, the yield of benzaldehyde glycol acetal is above 86.5%. The catalyst can be recycled for multiple uses and the acetal yield is 86.0% after five cycles.

Key words: aluminum dihydrogen tripolyphosphate, benzaldehyde glycol acetal, activated carbon, catalysis