Acid gas extraction of pyridine from water

Antero Laitinen (Corresponding Author), Olli Jauhiainen

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Pyridine was extracted from aqueous solutions initially containing 5 or 15 wt % pyridine by using liquid or supercritical carbon dioxide at 10 MPa as a solvent in a mechanically agitated countercurrent extraction column. The lowest pyridine concentration in the raffinate was 0.06 wt %, whereas the pyridine concentration in the extract was 86−94 wt %. From the initial amount of pyridine, 96−99% was transferred from the feed stream to the extract by using relatively small solvent-to-feed ratios of 2.8−4.6 (kg of solvent/kg of feed). The measured distribution coefficients for the water/pyridine/carbon dioxide system ranged from 0.3 to 1 (weight units), depending on the initial pyridine concentration in water. Carbon dioxide is a particularly suitable solvent for the extraction of pyridine from concentrated aqueous solutions. The efficiency may be the result of an acid−base interaction between weakly basic pyridine solute and weakly acidic carbon dioxide solvent in an aqueous environment.
Original languageEnglish
Pages (from-to)168 - 174
Number of pages7
JournalIndustrial & Engineering Chemistry Research
Volume39
Issue number1
DOIs
Publication statusPublished - 2000
MoE publication typeA1 Journal article-refereed

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Pyridine
Gases
Acids
Water
Carbon Dioxide
Carbon dioxide
pyridine
Liquids

Cite this

@article{22ff65b14eea48a5a086c4a0f96d6189,
title = "Acid gas extraction of pyridine from water",
abstract = "Pyridine was extracted from aqueous solutions initially containing 5 or 15 wt {\%} pyridine by using liquid or supercritical carbon dioxide at 10 MPa as a solvent in a mechanically agitated countercurrent extraction column. The lowest pyridine concentration in the raffinate was 0.06 wt {\%}, whereas the pyridine concentration in the extract was 86−94 wt {\%}. From the initial amount of pyridine, 96−99{\%} was transferred from the feed stream to the extract by using relatively small solvent-to-feed ratios of 2.8−4.6 (kg of solvent/kg of feed). The measured distribution coefficients for the water/pyridine/carbon dioxide system ranged from 0.3 to 1 (weight units), depending on the initial pyridine concentration in water. Carbon dioxide is a particularly suitable solvent for the extraction of pyridine from concentrated aqueous solutions. The efficiency may be the result of an acid−base interaction between weakly basic pyridine solute and weakly acidic carbon dioxide solvent in an aqueous environment.",
author = "Antero Laitinen and Olli Jauhiainen",
note = "Project code: K9SU00433",
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doi = "10.1021/ie990174t",
language = "English",
volume = "39",
pages = "168 -- 174",
journal = "Industrial & Engineering Chemistry Research",
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}

Acid gas extraction of pyridine from water. / Laitinen, Antero (Corresponding Author); Jauhiainen, Olli.

In: Industrial & Engineering Chemistry Research, Vol. 39, No. 1, 2000, p. 168 - 174.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Acid gas extraction of pyridine from water

AU - Laitinen, Antero

AU - Jauhiainen, Olli

N1 - Project code: K9SU00433

PY - 2000

Y1 - 2000

N2 - Pyridine was extracted from aqueous solutions initially containing 5 or 15 wt % pyridine by using liquid or supercritical carbon dioxide at 10 MPa as a solvent in a mechanically agitated countercurrent extraction column. The lowest pyridine concentration in the raffinate was 0.06 wt %, whereas the pyridine concentration in the extract was 86−94 wt %. From the initial amount of pyridine, 96−99% was transferred from the feed stream to the extract by using relatively small solvent-to-feed ratios of 2.8−4.6 (kg of solvent/kg of feed). The measured distribution coefficients for the water/pyridine/carbon dioxide system ranged from 0.3 to 1 (weight units), depending on the initial pyridine concentration in water. Carbon dioxide is a particularly suitable solvent for the extraction of pyridine from concentrated aqueous solutions. The efficiency may be the result of an acid−base interaction between weakly basic pyridine solute and weakly acidic carbon dioxide solvent in an aqueous environment.

AB - Pyridine was extracted from aqueous solutions initially containing 5 or 15 wt % pyridine by using liquid or supercritical carbon dioxide at 10 MPa as a solvent in a mechanically agitated countercurrent extraction column. The lowest pyridine concentration in the raffinate was 0.06 wt %, whereas the pyridine concentration in the extract was 86−94 wt %. From the initial amount of pyridine, 96−99% was transferred from the feed stream to the extract by using relatively small solvent-to-feed ratios of 2.8−4.6 (kg of solvent/kg of feed). The measured distribution coefficients for the water/pyridine/carbon dioxide system ranged from 0.3 to 1 (weight units), depending on the initial pyridine concentration in water. Carbon dioxide is a particularly suitable solvent for the extraction of pyridine from concentrated aqueous solutions. The efficiency may be the result of an acid−base interaction between weakly basic pyridine solute and weakly acidic carbon dioxide solvent in an aqueous environment.

U2 - 10.1021/ie990174t

DO - 10.1021/ie990174t

M3 - Article

VL - 39

SP - 168

EP - 174

JO - Industrial & Engineering Chemistry Research

JF - Industrial & Engineering Chemistry Research

SN - 0888-5885

IS - 1

ER -