An ultrasound-assisted extraction (UAE) method using ethanol was applied for extracting arabinogalactan (AG) and dihydroquercetin (DHQ) simultaneously from larch wood, as a pretreatment for pulping and papermaking. The extraction parameters were optimized by a Box-Behnken experimental design with the yields of AG and DHQ as the response values. Under optimum conditions (three extractions, each ...

Steady state simulation of a kraft pulp mill recausticizing plant was completed for the purposes of investigating process changes for an area upgrade. Due to errors in the measured data as well as assumptions made due to a lack of necessary information, the initially completed simulation was not the best representation of the process at steady state. A comprehensive approach has been used to im...

The adsorption of xylan on pulp fibers improves the strength properties of paper. However, the optical properties are decreased significantly. The objective of our research was to bleach hardwood kraft pulp with adsorbed birch xylan by hydrogen peroxide and study the effect of bleaching parameters on paper properties. The bleaching parameters studied included bleaching temperature, time, initia...

As part of an ongoing effort to apply the tools of systems engineering to the problems of modeling, controlling, and operating kraft recovery systems, a rather long historical record of chemical makeups to this process has been scrutinized. The data describe the pulp production, makeup of salt cake, and makeup of caustic for a single large pulp mill on a monthly basis over almost nine years fro...

persistente Zielverfolgung an prognostischer Kraft. 2 Eine ausführliche Darstellung der Metastudie zum Lernverhalten wird im August 2014 erscheinen: Schulmeister, R.: Auf der Suche nach Determinanten des Studienerfolgs.

The chemical composition of lipophilic extractives from process waters throughout a totally chlorine free (TCF) bleaching sequence after kraft pulping of eucalypt wood has been studied. These compounds are among the most problematic wood constituents for both TCF and zero liquid effluent (ZLE) processes, since they tend to accumulate in circuits resulting in the formation of the so-called pitch...