Liu Yan-jie
2011
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Journal
China Elastomerics
Abstract
Synthesis of dibutyl fumarate from monomethyl fumarate and n-butyl alcohol on cation exchange resin catalyst(NKC-9) was studied.Effects of reaction conditions,such as mole ratio of n-butyl alcohol to monomethyl fumarate,catalyst content,toluene content,and reaction time,and the reusability of the catalyst were investigated.Optimum reaction conditions were obtained,which were:n(n-butyl alcohol)∶n(monomethyl fumarate)=3.0∶1,catalyst content 6.0%(relative to total mass of monomethyl fumarate and n-butyl alcohol),reaction temperature≤120 ℃,toluene content 49.5%(relative to total mass of monomethyl fumarate and n-butyl alcohol),reaction time 2.5 h.The results showed that conversion of monomethyl fumarate could reach 98.1%,and activity of catalyst was still kept at 96.9% after being used 6 times.NKC-9 has many advantages,such as high activity,good stability and pollution-free to the environment.