METHOD FOR PRODUCING ACETIC ACID

METHOD FOR PRODUCING ACETIC ACID

It is intended to provide a method capable of suppressing distillation apparatus corrosion as a method for producing acetic acid, comprising the step of distilling a crude acetic acid solution containing acetic acid and an impurity having a higher boiling point than that of acetic acid to purify the...

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Hauptverfasser: SHIMIZU, Masahiko, MIZUTANI, Yoshihisa
Format: Patent
Sprache:eng ; fre ; ger
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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creator SHIMIZU, Masahiko
MIZUTANI, Yoshihisa
description It is intended to provide a method capable of suppressing distillation apparatus corrosion as a method for producing acetic acid, comprising the step of distilling a crude acetic acid solution containing acetic acid and an impurity having a higher boiling point than that of acetic acid to purify the acetic acid. The method for producing acetic acid of the present invention comprises the step described above, wherein the distillation of the crude acetic acid solution is performed under a condition involving a distillation column bottom temperature of not more than 165°C. An acetic acid concentration in the crude acetic acid solution to be subjected to the distillation is preferably not less than 90 mass%. Examples of the impurity having a higher boiling point than that of acetic acid include acetates, acetic anhydride, and propionic acid. A column bottom pressure of the distillation column is preferably less than 0.255 MPaG.
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The method for producing acetic acid of the present invention comprises the step described above, wherein the distillation of the crude acetic acid solution is performed under a condition involving a distillation column bottom temperature of not more than 165°C. An acetic acid concentration in the crude acetic acid solution to be subjected to the distillation is preferably not less than 90 mass%. Examples of the impurity having a higher boiling point than that of acetic acid include acetates, acetic anhydride, and propionic acid. 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subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
title METHOD FOR PRODUCING ACETIC ACID
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