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Journal articles
Open Access
Prebleaching kraft pulp by xylanases; the effect of water prehydrolsis, TAPPI JOURNAL, November 1993, Vol. 76(11)

Prebleaching kraft pulp by xylanases; the effect of water prehydrolsis, TAPPI JOURNAL, November 1993, Vol. 76(11)

Journal articles
Open Access
Effect of papermaking and coating variables on offset-print quality - part 1: papermaking variables, TAPPI JOURNAL, October 1993, Vol. 76(10)

Effect of papermaking and coating variables on offset-print quality - part 1: papermaking variables, TAPPI JOURNAL, October 1993, Vol. 76(10)

Journal articles
Magazine articles
Open Access
Fundamental molecular characterization and comparison of the O, D0, and E stage effluents from hardwood pulp bleaching, TAPPI Journal 2019

ABSTRACT: The present study characterized effluents from the O, D0, and E stages using nuclear magnetic reso-nance (NMR) and gel permeation chromatography (GPC) techniques to better understand the chemical nature of the dissolved organics formed from the bleaching of a high-yield hardwood kraft pulp. Understanding the structures and molecular weight distribution of these organics is the first step in developing methods to mitigate these contam-inates in the discharged effluents. The results indicated that the molecular weight distribution (MWD) of the dis-solved organics from oxygen delignification effluent is broader than those from D0 and E stage effluents. In addition, the O stage filtrate contained considerable amounts of lignin and xylan fragments, which showed its efficiency in removing such materials. The effluent from the D0 stage contained a lower amount of high molecular weight frag-ments and a higher amount of low molecular weight fragments versus the O-stage filtrate. Aromatic structures were nearly absent in the D0 stage filtrate, but the degraded organic material, presumably from oxidized lignin, contained olefinic (C=C) and carbonyl (C=O) functional groups. Furthermore, higher molecular weight fragments were detected in the E-stage effluent, presumably due to the extensive solubilization and removal of the oxidized lignin generated from the D0 pulp.

Journal articles
Open Access
1988 TAPPI Barcode Survey, TAPPI JOURNAL July 1989

1988 TAPPI Barcode Survey, TAPPI JOURNAL July 1989

Journal articles
Open Access
Converted bleach sequence improves pulp quality, TAPPI JOURNAL, July 1990, Vol. 73(7)

Converted bleach sequence improves pulp quality, TAPPI JOURNAL, July 1990, Vol. 73(7)

Journal articles
Open Access
Strategies for preventive maintenance in a modern pulp and paper mill, TAPPI JOURNAL, June 1991, Vol. 74(6)

Strategies for preventive maintenance in a modern pulp and paper mill, TAPPI JOURNAL, June 1991, Vol. 74(6)

Journal articles
Open Access
Reducing discharges from sulfite pulp bleach plants, TAPPI JOURNAL, May 1991, Vol. 74(5)

Reducing discharges from sulfite pulp bleach plants, TAPPI JOURNAL, May 1991, Vol. 74(5)

Journal articles
Open Access
The influence of bleaching on color in deinked pulps, TAPPI JOURNAL, July 1992, Vol. 75(7)

The influence of bleaching on color in deinked pulps, TAPPI JOURNAL, July 1992, Vol. 75(7)

Journal articles
Open Access
Using neutral/alkaline-curing resins to produce wet-strength grades from recycled pulp, TAPPI JOURNAL, July 1992, Vol. 75(7)

Using neutral/alkaline-curing resins to produce wet-strength grades from recycled pulp, TAPPI JOURNAL, July 1992, Vol. 75(7)

Journal articles
Open Access
BFR (tm): a new process toward bleach plant closure, TAPPI JOURNAL, November 1994, Vol. 77(11)

BFR (tm): a new process toward bleach plant closure, TAPPI JOURNAL, November 1994, Vol. 77(11)

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