Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (8): 1164.

• Articles • Previous Articles     Next Articles

Studies on the Synthesis of Dipentyl Phthalate Using Hydrotalcite-Containing Rare Earth as a Catalyst

LI Lian-Sheng1, MA Shu-Jie1, HUI Jian-Bin1, LIU Xin-Sheng1, XU Ru-Ren1, BAO Yu-Min2   

  1. 1. Department of Chemistry, Jilin Universtity, Changchun, 130023;
    2. Department of Chemistry, Inner Mongolia Nationalities Teacher' s College
  • Received:1994-11-17 Revised:1995-01-20 Online:1995-08-24 Published:1995-08-24

Abstract: Synthesis of dipentyl phthalate using hydrotalcite-containing rare earth as a catalyst is studied in detail,involved influence of amount of the catalyst,mole ratio of phthalic anhydride to n-pentanol,reaction temperature and time on the conversion of phthalic anhydride to dipentyl phthalate. The results show that the catalyst has a high catalytic activity and high selectivity,and the conversion is up to 95%.La content in the catalyst may change in a certain range and the conversion of phthalic anhydride increases with increasing of La content.The surface area of the catalyst calcined at 400℃ is about 120m2/g (BET/N2technique). It has Lewis and Bronsted acid sites and the amount of Lewis acid is far more than that of Bronsted acid.The mole ratio of chemical composition of the catalyst is Mg:Al:La=6:(2-x):x, where 0≤x≤1.0.

Key words: Hydrotalcite, Rare earth, Catalyst

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