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2010•Journal of Qingdao University of Science and TechnologyRequires access

Preparation of Propionic Anhydride by Reactive Distillation

Hongmin Wang

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Abstract

Propionic anhydride was prepared by continuous reactive distillation using acetic anhydride and propionic acid as starting materials.The Effects of reaction conditions such as n(propionic acid)∶n(anhydride),stage number of reaction section and reflux ratio on product purity were studied.The obtained optimum conditions were n(propionic acid)∶n(anhydride)= 2.02∶1,reflux ratio 3∶1 and stage number of reaction section 8.Under above conditions,the purity of propionic anhydride was 99.2%.

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Propionic anhydride was prepared by continuous reactive distillation using acetic anhydride and propionic acid as starting materials.The Effects of reaction conditions such as n(propionic acid)∶n(anhydride),stage number of reaction section and reflux ratio on product purity were studied.The obtained optimum conditions were n(propionic acid)∶n(anhydride)= 2.02∶1,reflux ratio 3∶1 and stage number of reaction section 8.Under above conditions,the purity of propionic anhydride was 99.2%.

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Available abstract

Propionic anhydride was prepared by continuous reactive distillation using acetic anhydride and propionic acid as starting materials.The Effects of reaction conditions such as n(propionic acid)∶n(anhydride),stage number of reaction section and reflux ratio on product purity were studied.The obtained optimum conditions were n(propionic acid)∶n(anhydride)= 2.02∶1,reflux ratio 3∶1 and stage number of reaction section 8.Under above conditions,the purity of propionic anhydride was 99.2%.

Key concepts: Acetic anhydride, Reactive distillation, Fractional distillation, Chemistry, Organic chemistry, Acid anhydride, Distillation, Reaction conditions

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