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Synthesis of diethylene glycol dibenzoate catalyzed by Ti(OBu)_4/AC

Chen Muhu

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Abstract

Diethylene glycol dibenzoate was synthesized by the reaction of benzoic acid(BA) with diethylene glycol(DEG) using Ti(OBu)4/AC as catalyst. The optimal reaction condition was found as: the molar ratio of benzoic acid to diethylene glycol was 2∶1,the mass ratio of catalyst to benzoic acid was 1.25%,the mass ratio of butyl ether to benzoic acid was 20%,reaction temperature was 200℃, and reaction time was 7h. The optimal esterification rate was up to 98.1%. After three times of repeated use,the esterification yield still maintained above 97%. The apparent kinetics model of esterification was established,and the equation of reaction rate was:rA=6. 28× 109exp102.80 RT CACB.

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What this paper is about

Diethylene glycol dibenzoate was synthesized by the reaction of benzoic acid(BA) with diethylene glycol(DEG) using Ti(OBu)4/AC as catalyst. The optimal reaction condition was found as: the molar ratio of benzoic acid to diethylene glycol was 2∶1,the mass ratio of catalyst to benzoic acid was 1.25%,the mass ratio of butyl ether to benzoic acid was 20%,reaction temperature was 200℃, and reaction time was 7h. The optimal esterification rate was up to 98.1%. After three times of repeated use,the esterification yield still maintained above 97%. The apparent kinetics model of esterification was established,and the equation of reaction rate was:rA=6. 28× 109exp102.80 RT CACB.

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Available abstract

Diethylene glycol dibenzoate was synthesized by the reaction of benzoic acid(BA) with diethylene glycol(DEG) using Ti(OBu)4/AC as catalyst. The optimal reaction condition was found as: the molar ratio of benzoic acid to diethylene glycol was 2∶1,the mass ratio of catalyst to benzoic acid was 1.25%,the mass ratio of butyl ether to benzoic acid was 20%,reaction temperature was 200℃, and reaction time was 7h. The optimal esterification rate was up to 98.1%. After three times of repeated use,the esterification yield still maintained above 97%. The apparent kinetics model of esterification was established,and the equation of reaction rate was:rA=6. 28× 109exp102.80 RT CACB.

Key concepts: Diethylene glycol, Benzoic acid, Catalysis, Yield (engineering), Chemistry, Molar ratio, Ether, Nuclear chemistry

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