- A green way to synthesize lubricating ester oils: The esterification of pentaerythrotol with fatty acids at stoichiometric ratio over [BHSO3MMIm]+[HSO4]?/SiO2
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A green way was provided to produce lubricating ester oils under solvent-free conditions over an ionic liquid catalyst supported with mesoporous silica, which was prepared by using sol-gel method and exhibited high activity and selectivity for the esterification of pentaerythrotol with fatty acid at stoichiometric ratio to the corresponding pentaerythrotol tetra-esters. The catalyst was systematically characterized by TEM, TG/DTA, BET and FT-IR. Moreover, the stability of the catalyst was investigated, and it can be recycled for several times without significant deactivation.
- Wang, Yanan,Lou, Wenjing,Wang, Xiaobo
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- An efficient catalyst COK-15b for the catalytic synthesis of lubricating ester oils
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The new material MOF of (CTA)1/3[Cu46(C9H3O6)24(OH)12] (PW12O40)3·xH2O (COK-15b) was synthesized via a dual-templating approach and exhibited high activity and selectivity for the esterification of pentaerythrotol with fatty acids at stoichiometric ratio to the corresponding pentaerythrotol tetra-esters with up to 98% yields under solvent-free conditions. The COK-15b was characterized by TEM, SEM, TG, BET, TPD and Py-IR. Moreover, the stability of COK-15b was investigated, and it can be reused for 5 running cycles without significant deactivation.
- Wang, Yanan,Ma, Rui,Jiang, Cheng,Lou, Wenjing,Wang, Xiaobo
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- A simple and convenient one-pot synthesis of fatty acid esters from hindered alcohols using N,N-dimethylchloro-sulfitemethaniminium chloride as dehydrating agent
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N,N-Dimethylchlorosulfitemethaniminium chloride (SOCl2-DMF) has been found to be an efficient reagent for one-pot synthesis of esters from equimolar amounts of fatty acids and hindered alcohols under mild conditions.
- Kaul, Savita,Kumar, Ajay,Sain, Bir,Gupta
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p. 2885 - 2891
(2007/10/03)
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