METHOD FOR MANUFACTURING 1,3-BUTYLENE GLYCOL, AND 1,3-BUTYLENE GLYCOL PRODUCT

METHOD FOR MANUFACTURING 1,3-BUTYLENE GLYCOL, AND 1,3-BUTYLENE GLYCOL PRODUCT

Provided is a method capable of manufacturing 1,3-butylene glycol having a high potassium permanganate test value. A method for manufacturing 1,3-butylene glycol, which is a method for obtaining purified 1,3-butylene glycol from a crude reaction liquid containing 1,3-butylene glycol, the method incl...

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Hauptverfasser: SHIMIZU, Masahiko, MIZUTANI, Yoshihisa
Format: Patent
Sprache:eng
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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creator SHIMIZU, Masahiko
MIZUTANI, Yoshihisa
description Provided is a method capable of manufacturing 1,3-butylene glycol having a high potassium permanganate test value. A method for manufacturing 1,3-butylene glycol, which is a method for obtaining purified 1,3-butylene glycol from a crude reaction liquid containing 1,3-butylene glycol, the method including: a dehydration step of removing water by distillation; a high boiling substance removal step of removing a high boiling point component by distillation; and a product distillation step of obtaining purified 1,3-butylene glycol, wherein in the product distillation step, a product column is used in which a liquid feed having a 1,3-butylene glycol concentration of 97% or higher, an acetaldehyde content of 500 ppm or lower, and a crotonaldehyde content of 200 ppm or lower is distilled under a condition of a reflux ratio of higher than 0.1, and a liquid concentrated with acetaldehyde and crotonaldehyde is distilled off from above a feed plate, and 1,3-butylene glycol is extracted from below the feed plate.
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subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
title METHOD FOR MANUFACTURING 1,3-BUTYLENE GLYCOL, AND 1,3-BUTYLENE GLYCOL PRODUCT
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