Jin Changlei
2010
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Journal
Industrial Catalysis
Abstract
Solid acid SO_4~(2-)-/ZrO_2/USY catalyst supported on USY zeolite was prepared by precipitation. Propyl chloroacetate was synthesized via the esterification of propanol and chloroacetic acid over SO_4~(2-)/ ZrO_2/USY.Influence of reaction time,the kind and dosage of water carrying agents,molar ratio of propanol to chloroacetic acid,and catalyst dosage on esterification yield was investigated.The experimental results indicated that esterification yield of 95.72% was attained under the reaction condition as follows: chloroacetic acid amount 0.25 mol,molar ratio of propanol to chloroacetic acid 1.5,reaction time 3 h,water carrying agent dosage of cyclohexane 7.5 mL,and catalyst dosage 1.0 g.The esterification yield still reached 94.91% after the catalyst was repeatedly used for 6 times.SO_4~(2-)/ZrO_2/USY catalyst exhibited excellent catalytic activity and reusability,and little environmental pollution under mild reaction condition.