Works (32)

Updated: July 5th, 2023 16:04

2008 journal article

Soda-AQ delignification of poplar wood. Part 1: Reaction mechanism and pulp properties

HOLZFORSCHUNG, 62(6), 627–636.

By: A. Venica n, C. Chen n & J. Gratzl n

author keywords: coniferyl alcohol; delignification; flow-through reactor; Grob-type fragmentation; low molecular weight products; poplar wood; reaction mechanisms; sinapyl alcohol; soda-AQ pulping; soda pulping
Source: Web Of Science
Added: August 6, 2018

2008 journal article

Soda-AQ delignification of poplar wood. Part 2: Further degradation of initially dissolved lignins

HOLZFORSCHUNG, 62(6), 637–644.

By: A. Venica n, C. Chen n & J. Gratzl n

author keywords: carbohydrates; delignification; deposition of xylans on fibers; nitrobenzene oxidation; permanganate oxidation; poplar wood; reactions of lignin fragments; soda-AQ pulping
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Oxidative ammonolysis of technical lignins. Part 4. Effects of the ammonium hydroxide concentration and pH

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 26(1), 95–109.

By: E. Capanema n, M. Balakshin n, C. Chen n & J. Gratzl n

author keywords: technical lignins; oxidative ammonolysis; kinetics of ammonium hydroxide concentration
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Dechlorination of chlorophenols found in pulp bleach plant E-1 effluents by advanced oxidation processes

BIORESOURCE TECHNOLOGY, 96(8), 897–906.

By: R. Wang n, C. Chen* & J. Gratzl*

author keywords: chlorinated phenols; advanced oxidation processes; UV-photolysis; dechlorination; kinetics; oxygen; hydrogen peroxide; ozone
MeSH headings : Chlorophenols / chemistry; Hydrogen Peroxide / chemistry; Industrial Waste; Kinetics; Oxidants / chemistry; Oxidants, Photochemical / chemistry; Oxidation-Reduction; Ozone / chemistry; Paper; Photochemistry; Water Purification / methods
TL;DR: In the dechlorination of 2 and 3, chemical species derived from ozone and hydrogen peroxide in alkaline solution were dominant reactions in the O3/UV- and O3-H2O2/ UV-photolysis systems as in the N2/UV-, O2-O2- and H2O-and-UV-potolyses oxidation systems. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Dechlorination of pulp bleaching plant E-1 effluent by ArF* and KrF* excirner laser photolysis. Part 1. Dechlorination of chlorophenols identified in E-1 effluent

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 172(3), 222–230.

By: T. Xie n, C. Chen n & J. Gratzl n

author keywords: pulp bleaching plant E-1 effluent; advanced oxidation processes; ArF* and KrF* eximer laser photolyses; 193 and 248 nm photons; dechlorination; oxygen; hydrogen peroxide; kinetics
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Dechlorination of pulp bleaching plant E-1 effluent by ArF* and KrF* excirner laser photolysis. Part 2. Dechlorination of polychlorinated oxylignins

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 172(3), 231–240.

By: T. Xie, C. Chen* & J. Gratzl*

author keywords: pulp bleaching plant E-1 effluent; polychlorinated oxylignins; ultrafiltration; advanced oxidation processes; ArF* (193 nm) eximer laser photolysis; decolorization; dechlorination; oxygen; hydrogen peroxide; kinetics
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Dechlorination and decolorization of chloro-organics, in pulp bleach plant E-1 effluents, by advanced oxidation processes

Bioresource Technology, 94(3), 267–274.

By: R. Wang, C. Chen & J. Gratzl

Source: NC State University Libraries
Added: August 6, 2018

2004 journal article

Ozonation of pine kraft lignin in alkaline solution. Part 1: Ozonation, characterization of kraft lignin and its ozonated preparations

HOLZFORSCHUNG, 58(6), 622–630.

By: R. Wang n, C. Chen n & J. Gratzl n

author keywords: chemical composition; functional group analysis; molecular mass distribution; nitrobenzene-potassium permanganate oxidation; ozonation in alkaline solution; pine kraft lignin; reaction mechanisms; ultrafiltration
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Ozonation of pine kraft lignin in alkaline solution. Part 2: Surface active properties of the ozonated kraft lignins

HOLZFORSCHUNG, 58(6), 631–639.

By: R. Wang n, C. Chen n & J. Gratzl n

author keywords: interfacial tension; Gibbs adsorption equation for dilute solution; ozonated kraft lignins; surface tension
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2003 journal article

Comparative studies on oxidation of lignin model compounds with hydrogen peroxide using Mn(IV)-Me(3)TACN and Mn(IV)-Me4DTNE as catalyst

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 206(1-2), 37–51.

By: V. Alves n, E. Capanema n, C. Chen n & J. Gratzl n

author keywords: lignin model compounds; binucleus Mn(IV) complexes; oxidation; hydrogen peroxide; catalysis; reaction kinetics; reaction mechanisms; catalytic cycle; epoxidation of conjugated double bonds
Source: Web Of Science
Added: August 6, 2018

2002 journal article

Oxidative ammonolysis of technical lignins - Part 3. Effect of temperature on the reaction rate

HOLZFORSCHUNG, 56(4), 402–415.

By: E. Capanema*, M. Balakshin*, C. Chen*, J. Gratzl* & A. Kirkman*

author keywords: technical lignins; oxidative ammonolysis of lignins; kinetics of ammonolysis; effect of temperature; nitrogen incorporation; lignin solubiliztion
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2001 journal article

Biobleaching of pulp with dioxygen in laccase-mediator system - effect of variables on the reaction kinetics

JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC, 16(3-4), 205–215.

By: M. Balakshin n, C. Chen n, J. Gratzl n, A. Kirkman n & H. Jakob*

author keywords: Coriolus laccase; laccase-mediator system (LMS); biobleaching of pulp; totally chlorine free bleaching; kinetics; delignification; oxidation; dioxygen uptake
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2001 journal article

Biobleaching of pulp with dioxygen in the laccase-mediator system - reaction mechanisms for degradation of residual lignin

JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC, 13(1-3), 1–16.

By: M. Balakshin n, E. Capanema n, C. Chen n, J. Gratzl n, A. Kirkman n & H. Gracz n

author keywords: pine Kraft-AQ pulp; biobleaching; dioxygen; laccase-mediator system (LMS); residual lignin; alkaline soluble lignins; changes in structures of lignins; reaction mechanisms
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2001 journal article

Oxidative ammonolysis of technical lignins - Part 1. Kinetics of the reaction under isothermal condition at 130 degrees C

HOLZFORSCHUNG, 55(4), 397–404.

By: E. Capanema*, M. Balakshin*, C. Chen*, J. Gratzl* & A. Kirkman*

author keywords: technical lignins; oxidative ammonolysis; kinetics; isothermal condition; composition of N-modified lignins
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2001 journal article

Oxidative ammonolysis of technical lignins - Part 2. Effect of oxygen pressure

HOLZFORSCHUNG, 55(4), 405–412.

By: E. Capanema*, M. Balakshin*, C. Chen*, J. Gratzl* & A. Kirkman*

author keywords: technical lignins; oxidative ammonolysis; kinetics; oxygen; composition of N-modified lignins
Source: Web Of Science
Added: August 6, 2018

2001 journal article

Structural analysis of residual and technical lignins by H-1-C-13 correlation 2D NMR-spectroscopy

HOLZFORSCHUNG, 55(3), 302–308.

By: E. Capanema, M. Balakshin*, C. Chen*, J. Gratzl* & H. Gracz*

author keywords: technical lignin; residual lignin; 2D NMR spectra; diarylmethane structure
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Biobleaching of pulp with dioxygen in the laccase-mediator system. Part 1. Kinetics of delignification

HOLZFORSCHUNG, 54(4), 390–396.

By: M. Balakskin, C. Chen*, J. Gratzl*, A. Kirkman* & H. Jakob

author keywords: biobleaching; totally chlorine free bleaching; laccase-mediator system (LMS); kinetics; delignification; oxidation; dioxygen uptake; multi-LMS bleaching process
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Chemistry of pulping: Lignin reactions

Lignin: Historical, Biological, and Materials Perspectives, 742, 392–421.

By: J. Gratzl & C. Chen

Ed(s): R. W. G. Glasser & T. Schultz

Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

Confirmation of the presence of formaldehyde and N-(methylene)morpholinium cations as reactive species in the cellulose/NMMO/water system by trapping reactions

HOLZFORSCHUNG, 54(1), 101–103.

By: A. Potthast, T. Rosenau, P. Kosma, C. Chen* & J. Gratzl*

author keywords: N-methylmorpholine-N-oxide; cellulose; carbenium-iminium ions; formaldehyde; trapping reactions
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Kinetic studies on oxidation of veratryl alcohol by laccase-mediator system - Part 1. Effects of mediator concentration

HOLZFORSCHUNG, 54(2), 165–170.

By: M. Balakshin*, C. Chen*, J. Gratzl*, A. Kirkman* & H. Jakob

author keywords: laccase; ABTS; veratryl alcohol; oxidation; kinetics
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Kinetic studies on oxidation of veratryl alcohol by laccase-mediator system. Part 2. The kinetics of dioxygen uptake

HOLZFORSCHUNG, 54(2), 171–175.

By: M. Balakshin*, C. Chen*, J. Gratzl*, A. Kirkman* & H. Jakob

author keywords: laccase; ABTS; veratryl alcohol; dioxygen; LMS; oxidation; kinetics
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Kinetic study on delignification of kraft-AQ pine pulp with hydrogen peroxide catalyzed by Mn(IV)-Me4DTNE

HOLZFORSCHUNG, 54(4), 413–419.

By: Y. Cui*, P. Puthson, C. Chen*, J. Gratzl* & A. Kirkman*

author keywords: pine kraft pulp; binuclear Mn(IV) complex; hydrogen peroxide; Mn(IV)-Me4DTNE-catalyzed bleaching of pulp; oxidation of residual lignin; delignification kinetics; brightness of bleached pulp; viscosity of bleached pulp
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Laccase-catalyzed oxidation of 1-(3,4-dimethoxyphenyl)-1-propene using ABTS as mediator

JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC, 8(4-6), 213–219.

By: C. Chen n, A. Potthast n, T. Rosenau n, J. Gratzl n, A. Kirkman n, D. Nagai*, T. Miyakoshi*

author keywords: fungal laccases; enzyme-catalyzed oxidation; 1-(3,4-dimethoxyphenyl)-1-propene; laccase-mediator system
TL;DR: It is shown that 2 is converted into 3–5 via 1-(3,4-dimethoxyphenyl)propane-1,2-epoxide in the acetate buffer in the presence of ABTS, which is epoxidation of the double bond conjugated to the aromatic ring. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1999 journal article

A Mn(IV)-Me4DTNE complex catalyzed oxidation of lignin model compounds with hydrogen peroxide

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 144(3), 411–417.

By: Y. Cui n, C. Chen n, J. Gratzl n & R. Patt*

author keywords: Mn complexes; catalysis; hydrogen peroxide; oxidation; lignin model compounds
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1999 personal communication

Autocatalytic decomposition of N-methylmorpholine N-oxide induced by Mannich intermediates

By: T. Rosenau, A. Potthast, P. Kosma, C. Chen & J. Gratzl

Source: NC State University Libraries
Added: August 6, 2018

1999 patent

Selective enzymatic oxidation of aromatic methyl groups to aldehydes by oxygen in the presence of a laccase-mediator catalyst

Washington, DC: U.S. Patent and Trademark Office.

By: C. Chen, J. Gratzl, A. Kirkman, A. Potthast & T. Rosenau

Source: NC State University Libraries
Added: August 6, 2018

1998 journal article

Reactions of lignin with cyanamide activated hydrogen peroxide Part 1. The degradation of lignin model compounds

HOLZFORSCHUNG, 52(5), 506–512.

By: J. Kadla*, P. Chang, C. Chen* & J. Gratzl*

author keywords: hydrogen peroxide; cyanamide; peroxyimidic acid; superoxide anion radical; lignin model compound
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1998 journal article

Reactions of lignin with cyanamide activated hydrogen peroxide Part 2. The degradation mechanism of phenolic lignin model compounds

HOLZFORSCHUNG, 52(5), 513–520.

By: J. Kadla*, H. Chang*, C. Chen* & J. Gratzl*

author keywords: hydrogen peroxide; cyanamide; mechanisms; lignin model compounds; superoxide anion radical
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1997 journal article

Sonolysis of chloro-organics in bleach plant E-1 effluents

HOLZFORSCHUNG, 51(5), 452–458.

By: Y. Uraki, C. Chen* & J. Gratzl*

author keywords: sonolysis; acoustic cavitation; 4-chlorophenol; 2,4,6-trichlorophenol; polychlorinated oxylignin; chlorine bleaching; E-1 effluents; kinetics; dechlorination
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1991 patent

Two stage process for the oxygen delignification of lignocellulosic fibers with peroxide reinforcement in the first stage

Washington, DC: U.S. Patent and Trademark Office.

By: V. Parthasarathy, M. Sundaram, H. Jameel, J. Gratzl & R. Klein

Source: NC State University Libraries
Added: August 6, 2018

1989 patent

Process for delignification of cellulosic substances by pretreating with a complexing agent followed by peroxide prior to kraft digestion

Washington, DC: U.S. Patent and Trademark Office.

By: J. Gratzl

Source: NC State University Libraries
Added: August 6, 2018

1989 patent

Process for the delignification of cellulosic substances by pretreating with a complexing agent followed by hydrogen peroxide

Washington, DC: U.S. Patent and Trademark Office.

By: J. Gratzl

Source: NC State University Libraries
Added: August 6, 2018

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