Reaction pathways in pentachlorophenol synthesis. 1. Temperature-programmed reaction

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Pentachlorophenol, a wood preservative for nonresidential applications, contains parts per million levels of dibenzodioxins and dibenzofurans with six or more chlorine atoms. There is interest in reducing the levels of these microcontaminants in pentachlorophenol. We conducted pentachlorophenol synthesis reactions in the laboratory to demonstrate the ability to mimic the commercially practiced temperature-programmed synthesis and to identify an operating region where mass-transfer limitations were effectively eliminated. The laboratory system was operated in a temperature-programmed fashion and produced pentachlorophenol with a yield and microcontaminant content similar to those of the commercially produced material. The experiments also revealed a stirring rate, number of gas spargers, and chlorine flow rate that enabled the laboratory-scale reaction to proceed in the kinetics-controlled regime. Results indicated that microcontaminant formation was low until near the end of the run where the microcontaminant levels increased greatly with modest increases in temperature and pentachlorophenol yield. Additionally, the presence or absence of mass-transfer limitations had little influence on the effect of temperature on the pentachlorophenol yield and micrcontaminant level.

Original languageEnglish (US)
Pages (from-to)5021-5026
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume43
Issue number17
DOIs
StatePublished - Aug 16 2004

Fingerprint

Pentachlorophenol
Chlorine
Mass transfer
Temperature
Wood
Flow rate
Atoms
Kinetics
Gases
Experiments

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

@article{738f65f72f634353b042905f42bec6de,
title = "Reaction pathways in pentachlorophenol synthesis. 1. Temperature-programmed reaction",
abstract = "Pentachlorophenol, a wood preservative for nonresidential applications, contains parts per million levels of dibenzodioxins and dibenzofurans with six or more chlorine atoms. There is interest in reducing the levels of these microcontaminants in pentachlorophenol. We conducted pentachlorophenol synthesis reactions in the laboratory to demonstrate the ability to mimic the commercially practiced temperature-programmed synthesis and to identify an operating region where mass-transfer limitations were effectively eliminated. The laboratory system was operated in a temperature-programmed fashion and produced pentachlorophenol with a yield and microcontaminant content similar to those of the commercially produced material. The experiments also revealed a stirring rate, number of gas spargers, and chlorine flow rate that enabled the laboratory-scale reaction to proceed in the kinetics-controlled regime. Results indicated that microcontaminant formation was low until near the end of the run where the microcontaminant levels increased greatly with modest increases in temperature and pentachlorophenol yield. Additionally, the presence or absence of mass-transfer limitations had little influence on the effect of temperature on the pentachlorophenol yield and micrcontaminant level.",
author = "Jianli Yu and Savage, {Phillip E.}",
year = "2004",
month = "8",
day = "16",
doi = "10.1021/ie030827c",
language = "English (US)",
volume = "43",
pages = "5021--5026",
journal = "Industrial and Engineering Chemistry Research",
issn = "0888-5885",
publisher = "American Chemical Society",
number = "17",

}

Reaction pathways in pentachlorophenol synthesis. 1. Temperature-programmed reaction. / Yu, Jianli; Savage, Phillip E.

In: Industrial and Engineering Chemistry Research, Vol. 43, No. 17, 16.08.2004, p. 5021-5026.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Reaction pathways in pentachlorophenol synthesis. 1. Temperature-programmed reaction

AU - Yu, Jianli

AU - Savage, Phillip E.

PY - 2004/8/16

Y1 - 2004/8/16

N2 - Pentachlorophenol, a wood preservative for nonresidential applications, contains parts per million levels of dibenzodioxins and dibenzofurans with six or more chlorine atoms. There is interest in reducing the levels of these microcontaminants in pentachlorophenol. We conducted pentachlorophenol synthesis reactions in the laboratory to demonstrate the ability to mimic the commercially practiced temperature-programmed synthesis and to identify an operating region where mass-transfer limitations were effectively eliminated. The laboratory system was operated in a temperature-programmed fashion and produced pentachlorophenol with a yield and microcontaminant content similar to those of the commercially produced material. The experiments also revealed a stirring rate, number of gas spargers, and chlorine flow rate that enabled the laboratory-scale reaction to proceed in the kinetics-controlled regime. Results indicated that microcontaminant formation was low until near the end of the run where the microcontaminant levels increased greatly with modest increases in temperature and pentachlorophenol yield. Additionally, the presence or absence of mass-transfer limitations had little influence on the effect of temperature on the pentachlorophenol yield and micrcontaminant level.

AB - Pentachlorophenol, a wood preservative for nonresidential applications, contains parts per million levels of dibenzodioxins and dibenzofurans with six or more chlorine atoms. There is interest in reducing the levels of these microcontaminants in pentachlorophenol. We conducted pentachlorophenol synthesis reactions in the laboratory to demonstrate the ability to mimic the commercially practiced temperature-programmed synthesis and to identify an operating region where mass-transfer limitations were effectively eliminated. The laboratory system was operated in a temperature-programmed fashion and produced pentachlorophenol with a yield and microcontaminant content similar to those of the commercially produced material. The experiments also revealed a stirring rate, number of gas spargers, and chlorine flow rate that enabled the laboratory-scale reaction to proceed in the kinetics-controlled regime. Results indicated that microcontaminant formation was low until near the end of the run where the microcontaminant levels increased greatly with modest increases in temperature and pentachlorophenol yield. Additionally, the presence or absence of mass-transfer limitations had little influence on the effect of temperature on the pentachlorophenol yield and micrcontaminant level.

UR - http://www.scopus.com/inward/record.url?scp=4043087670&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4043087670&partnerID=8YFLogxK

U2 - 10.1021/ie030827c

DO - 10.1021/ie030827c

M3 - Article

AN - SCOPUS:4043087670

VL - 43

SP - 5021

EP - 5026

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

SN - 0888-5885

IS - 17

ER -