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Low‐temperature chemical glycerolysis to produce diacylglycerols by heterogeneous base catalyst
Author(s) -
Zhong Nanjing,
Deng Xiaoting,
Huang Jianrong,
Xu Li,
Hu Kun,
Gao Yongqing
Publication year - 2014
Publication title -
european journal of lipid science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 94
eISSN - 1438-9312
pISSN - 1438-7697
DOI - 10.1002/ejlt.201300438
Subject(s) - catalysis , chemistry , glycerol , acetone , molar ratio , stoichiometry , heterogeneous catalysis , organic chemistry , chemical engineering , engineering
The present study aimed to develop a heterogeneous catalysis process for diacylglycerols (DAG) production through low‐temperature chemical glycerolysis. Of the heterogeneous catalysts evaluated, MgO‐supported KOH (KOH–MgO) was found effective for the low‐temperature chemical glycerolysis, and the KOH–MgO was characterized by FT‐IR and powder XRD. Reaction temperature was of paramount importance and 80°C was found necessary to enhance the present reaction. Molar ratio of oil to glycerol at stoichiometric ratio (2:1) gave more DAG formation. 41.8 ± 0.8 wt% of DAG was obtained under these conditions: KOH–MgO concentration 4.5 wt% based on oil, acetone dosage 3:1 (acetone to oil in weight ratio), molar ratio of oil to glycerol 2:1, reaction temperature 80°C and time 12 h. Practical applications: Heterogeneous catalysis has been recognized as green process, it is advantageous over the homogeneous catalysis in terms of separation and reusability of catalysts. The MgO‐supported KOH catalyst described in this study can effectively catalyze the low‐temperature chemical glycerolysis, it could be considered for practical applications.