3008-50-2Relevant academic research and scientific papers
An efficient catalyst COK-15b for the catalytic synthesis of lubricating ester oils
Wang, Yanan,Ma, Rui,Jiang, Cheng,Lou, Wenjing,Wang, Xiaobo
, p. 28 - 32 (2019/01/24)
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.
A green way to synthesize lubricating ester oils: The esterification of pentaerythrotol with fatty acids at stoichiometric ratio over [BHSO3MMIm]+[HSO4]?/SiO2
Wang, Yanan,Lou, Wenjing,Wang, Xiaobo
, p. 21 - 25 (2018/04/05)
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.
Microwave-promoted synthesis of polyol esters for lubrication oil using a composite catalyst in a solvent-free procedure
Zhang, Fengxiu,Zhang, Guangxian
experimental part, p. 178 - 184 (2011/03/23)
A rapid, highly efficient and green synthetic approach to polyol esters for lubrication oils is proposed. Using sulfuric acid and p-toluene sulfonic acid as a composite catalyst and C5-C9 straight-chain monocarboxylic acids, with pentaerythritol (PE) and dipentaerythritol (di-PE) as starting materials, a series of lubrication oil polyol esters were synthesized in the absence of solvent under microwave irradiation. Compared with the conventional synthetic method, our proposed microwave method exhibits advantages, including higher yields, shorter reaction times and lower reaction temperatures. The viscosity coefficients of the products at 40 °C and their refractive indices at 25 °C were investigated. In addition, the thermal behavior of the starting materials under microwave irradiation was also investigated. The results reveal that the microwave absorbance of n-pentanoic acid is stronger than that of n-hexanoic acid and that of n-heptanoic acid is stronger than that of n-octanoic acid. The microwave absorbance of di-PE is also stronger than that of PE.
A simple and convenient one-pot synthesis of fatty acid esters from hindered alcohols using N,N-dimethylchloro-sulfitemethaniminium chloride as dehydrating agent
Kaul, Savita,Kumar, Ajay,Sain, Bir,Gupta
, p. 2885 - 2891 (2007/10/03)
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.
