Naphthenic acid butyl was synthesized by using naphthenic acid from Kelamayi
Xinjiang and butane as raw materials in the presence of concentrated sulfuric acid.The effects of amount of the agent
reaction time
catalyst dosage
reaction temperature
molar ratio of acid to alcohol on the ratios of esterification were investigated.The optimum technology can be obtained as follows: amount of benzene was 50%
the reaction time was 4 h
the reaction temperature was 160 °C
the concentration of the concentrated sulfuric acid was 1.5%
the molar ratio of acid to alcohol was 1:2
the esterification rate of naphthenic acid is more than 92%.
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references
Havre T E,Sjoblom J,Vindstad J E.Oil/water partitioning and interfacial behavior of naphthenic acids[J].Journal ofDispersion Science and Technology,2003,24(6):789-801.
Ese M H,Kilpatrick P K.Stabilization of water-in-oil emulsion by naphthenic acids and their salts:model compounds,roleof pH,and soap:acid ratio[J].Journal of Dispersion Science and Technology,2004,25(3):253-261.
Laredo G C,Lopez C R,Alvarez R E,et al.Naphthenic acids,total acid number and sulfur content profile characterizationin isthmus and maya crude oils[J].Fuel,2004,83:1689-1695.
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