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Catalystic Synthesis of Triethyl Citrate by Novel Water-Tolerant Zr(SO_4)_2/AC Solid Acid Catalyst

Jingchang Zhang

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Abstract

In this paper,triethyl citrate was synthesized through novel water-tolerant Zr(SO4)2·4H2O/ AC solid acid catalyst. The effect of factors on the yield was discussed. The optimum synthesis conditions were as follow:w(Zr(SO4)2·4H2O/ AC)=30%,calcined at 110 ℃ for 2 h,w(catalyst/citric acid)=4%,5∶1 citric acid to ethanol (molar ratio),reacted at 100 ℃ for 5 h. The yield of esterification can reach 97.6%. After reused for 4 times,the yield of esterification still reach over 93 %. Moreover,the environmental catalyst was separated easily from product.

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What this paper is about

In this paper,triethyl citrate was synthesized through novel water-tolerant Zr(SO4)2·4H2O/ AC solid acid catalyst. The effect of factors on the yield was discussed. The optimum synthesis conditions were as follow:w(Zr(SO4)2·4H2O/ AC)=30%,calcined at 110 ℃ for 2 h,w(catalyst/citric acid)=4%,5∶1 citric acid to ethanol (molar ratio),reacted at 100 ℃ for 5 h. The yield of esterification can reach 97.6%. After reused for 4 times,the yield of esterification still reach over 93 %. Moreover,the environmental catalyst was separated easily from product.

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Available abstract

In this paper,triethyl citrate was synthesized through novel water-tolerant Zr(SO4)2·4H2O/ AC solid acid catalyst. The effect of factors on the yield was discussed. The optimum synthesis conditions were as follow:w(Zr(SO4)2·4H2O/ AC)=30%,calcined at 110 ℃ for 2 h,w(catalyst/citric acid)=4%,5∶1 citric acid to ethanol (molar ratio),reacted at 100 ℃ for 5 h. The yield of esterification can reach 97.6%. After reused for 4 times,the yield of esterification still reach over 93 %. Moreover,the environmental catalyst was separated easily from product.

Key concepts: Citric acid, Catalysis, Yield (engineering), Calcination, Chemistry, Nuclear chemistry, Solid acid, Molar ratio

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Catalystic Synthesis of Triethyl Citrate by Novel Water-Tolerant Zr(SO_4)_2/AC Solid Acid Catalyst — Research Paper | ScholarLens