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Conference papers
Standard Bleaching Sequences with Modern Ozone Technology, 2

Standard Bleaching Sequences with Modern Ozone Technology, 2016 PEERS

Conference papers
Effects of Esterase on the Behavioral Characteristics of Mic

Effects of Esterase on the Behavioral Characteristics of Microstickies in Whitewater of Recycled Pulp, 2016 PEERS

Fundamental Studies Applied for Latest Development in Deinking Flotation Technology, 2009 TAPPI Engineering, Pulping, Environmental Conference

Fundamental Studies Applied for Latest Development in Deinking Flotation Technology, 2009 TAPPI Engineering, Pulping, Environmental Conference

Conference papers
Optical Properties, Stickies, and Strength Tutorial, 2018 PEERS

Optical Properties, Stickies, and Strength Tutorial, 2018 PEERS

Finch Paper LLC, 2011 PEERS Conference

Finch Paper LLC, 2011 PEERS Conference

TAPPI News
TAPPICon 2022 Draws Paper, Packaging and Tissue Leaders from Around the World

Interactive, in-person conference provides innovative solutions to contemporary mill challenges

Kraft Pulping Integrated with Mild Alkaline Pre-Extraction of Southern Mixed Hardwoods, 2008 Engineering, Pulping and Environmental Conference

Kraft Pulping Integrated with Mild Alkaline Pre-Extraction of Southern Mixed Hardwoods, 2008 Engineering, Pulping and Environmental Conference

Journal articles
Magazine articles
Open Access
Fate of phosphorus in the recovery cycle of the kraft pulping process, TAPPI Journal March 2020

ABSTRACT: The accumulation of nonprocess elements in the recovery cycle is a common problem for kraft pulp mills trying to reduce their water closure or to utilize biofuels in their lime kiln. Nonprocess elements such as magnesium (Mg), manganese (Mn), silicon (Si), aluminum (Al), and phosphorus (P) enter the recovery cycle via wood, make-up chemicals, lime rock, biofuels, and process water. The main purge point for these elements is green liquor dregs and lime mud. If not purged, these elements can cause operational problems for the mill. Phosphorus reacts with calcium oxide (CaO) in the lime during slaking; as a result, part of the lime is unavailable for slaking reactions. The first part of this project, through laboratory work, identified rhenanite (NaCa(PO4)) as the form of P in the lime cycle and showed the negative effect of P on the availability of the lime. The second part of this project involved field studies and performing a mass balance for P at a Canadian kraft pulp mill.

Journal articles
Magazine articles
Open Access
Synthesis of filtrate reducer from biogas residue and its application in drilling fluid, TAPPI Journal March 2020

ABSTRACT: Biogas residues (BR) containing cellulose and lignin are produced with the rapid development of biogas engineering. BR can be used to prepare the filtrate reducer of water-based drilling fluid in oilfields by chemical modification. BR from anaerobically fermenting grain stillage was alkalized and etherified by caustic soda and chloroacetic acid to prepare filtrate reducer, which was named as FBR. The long-chain crystalline polysaccharides were selected as dispersing agents (DA), and the water-soluble silicate was used as the cross-linking agent. After the hot rolling of FBR in saturated saltwater base mud for 16 h at 120°C, the filtration loss was increased from 7.20 mL/30 min before aging to 8.80 mL/30 min after aging. Compared with the commercial filtrate reducers, FBR had better tolerance to high temperature and salt, and lower cost.

Journal articles
Magazine articles
Open Access
Lignin carbohydrate complex studies during kraft pulping for producing paper grade pulp from birch, TAPPI Journal September 2020

ABSTRACT: Paper grade pulp production across the globe is dominated by the kraft process using different lignocellulosic raw materials. Delignification is achieved around 90% using different chemical treatments. A bottleneck for complete delignification is the presence of residual covalent bonds that prevail between lignin and carbohydrate even after severe chemical pulping and oxygen delignification steps. Different covalent bonds are present in native wood that sustain drastic pulping conditions. In this study, 100% birch wood was used for producing paper grade pulp, and the lignin carbohydrate bonds were analyzed at different stages of the kraft cook. The lignin carbohydrate bonds that were responsible for residual lignin retention in unbleached pulp were compared and analyzed with the original lignin-carbohydrate complex (LCC) bonds in native birch wood. It was shown that lignin remaining after pulping and oxygen delignification was mainly bound to xylan, whereas the lignin bound to glucomannan was for the most part degraded.