Characterization of the High Molecular Mass Chlorinated Matter in Spent Bleach Liquors (SBL) - Part 1. Alkaline SBL

Lindström, Krister; Österberg, F.

doi:10.1515/hfsg.1984.38.4.201

Cited by 49 publications

(42 citation statements)

References 3 publications

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“…Bleaching conditions, work-up procedures such äs ultrafiltration, chemical degradation and the methods of TOC1 determination äs well äs IR-and NMR-speclroscopy have been described in an earlier paper (Lindström and Österberg 1984).…”

Section: Methodsmentioning

confidence: 99%

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Characterization of the High Molecular Mass Chlorinated Matter in Spent Bleach Liquors (SBL). Part II. Acidic SBL

Österberg¹,

Lindström²

1985

Holzforschung

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Section: Methodsmentioning

confidence: 99%

“…»t In an earlier paper (Lindström and Österberg 1984), we described the high molecular material in the SBL's of the alkaline extraction stages after three different prebleaching sequences. In these liquors more than 90% of the organically bound chlorine (OCL) was found in the high molecular mass fractions (M r > 1000).…”

Section: Introductionmentioning

confidence: 99%

Characterization of the High Molecular Mass Chlorinated Matter in Spent Bleach Liquors (SBL). Part II. Acidic SBL

Österberg¹,

Lindström²

1985

Holzforschung

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“…1 concentration of the aromatic degradation products in the alkaline spent liquors has been reported earlier. 4 The compounds listed in Table 1 were separated as their trideuteromethyl ethers (when hydroxy groups were present in the molecule) and as their methyl esters (acidic groups). Compounds were tentatively identified using mass spectrometry and, when available, spectra were matched against those of the reference compounds.…”

Section: Resultsmentioning

confidence: 99%

“…4 The degradation products obtained were separated and identified by gas chromatography/mass spectrometry (GCIMS). The GCIMS system was a Carlo Erba 2900 gas chromatograph with a BDS glass capillary column (35 m, i.d.…”

Section: Cmentioning

confidence: 99%

Characterization of the high molecular mass chlorinated matter in spent bleach liquors (SBL): 3—Mass spectrometric interpretation of aromatic degradation products in SBL

Österberg

Lindström

1985

Org. Mass Spectrom.

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The aromatic content of the high molecular matter in pulp mill bleachery e5uents has been characterized after chemical degradation in the laboratory followed by derivatization and gas chromatographic/mass spectrometric analysis. Aromatic molecules with carboxy, hydroxy, methoxy and chloro substituents were separated and identified by recording their computer-reconstructed ion current chromatograms. About 70 aromatic carboxylic acids were tentatively identified as degradation products. Aromatic compounds with hydroxy groups were derivatized to trideuteromethoxy groups in order to distinguish them by mass spectrometry from compounds with naturally occurring methoxy groups. Sigle and double hydrogen atom transfer between methyl ester and methoxy groups were observed in some molecules and given special attention when they occurred ortho to each other. A methoxy group substituted ortho to a methyl carboxylate resulted in an unusual fragmentation.

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“…Detailed structural analysis of the high molecular weight fractions of both alkaline and acidic kraft mill spent bleach liquors was reported by Lindström and Osterberg. 132,133 The liquors were subjected to several steps of ultrafiltration and fractions were characterized by a variety of techniques including infra-red and 1 H and 13 C nuclear magnetic resonance (NMR) spectroscopy for structural identification. GC, MS, and microwave multiple plasma emission spectroscopy for elemental analysis were used on low molecular weight fractions and on degradation products.…”

Section: Analysis Of Process Waters and Effluentsmentioning

confidence: 99%

Pulp and Paper Matrices

Douek

2000

Encyclopedia of Analytical Chemistry

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Chemical analysis plays an important role in pulp and paper research and in the day‐to‐day operation of pulp and paper mills. It is used in practically every aspect of the papermaking process, including the characterization of raw materials and products, optimization of process parameters, addressing environmental concerns, and diagnosing operation and product quality problems. This article provides an overview of the major types of chemical analyses conducted on pulp and paper matrices. The emphasis is mainly on the principle, significance, and applications of the various analyses. Major areas of application include the analysis of wood pulp, process liquids, paper, and deposits and contaminants. Analytical techniques and instrumentation range from the traditional or standard wet chemical and instrumental methods designed primarily for routine testing in mills to highly sophisticated techniques used mainly for research purposes.

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Characterization of the High Molecular Mass Chlorinated Matter in Spent Bleach Liquors (SBL) - Part 1. Alkaline SBL

Cited by 49 publications

References 3 publications

Characterization of the High Molecular Mass Chlorinated Matter in Spent Bleach Liquors (SBL). Part II. Acidic SBL

Characterization of the High Molecular Mass Chlorinated Matter in Spent Bleach Liquors (SBL). Part II. Acidic SBL

Characterization of the high molecular mass chlorinated matter in spent bleach liquors (SBL): 3—Mass spectrometric interpretation of aromatic degradation products in SBL

Pulp and Paper Matrices

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