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...

of Gasification of Black Liquor Char by actions of Some Sulfur Compounds, Inorg. Steam, IEC Research 30(7): 1594 (1991). Chem. 22(22):3243 (1983). 26. DEARNALEY, R.I., KERRIDGE, D.H. and 27. ZOU, X., Recovery of Kraft Black Liquor ROGERS, D.J., Molten Lithium Sulfate-SoIncluding Direct Causticization, Ph.D. Metallurgical Trans. B 19B(2):73 (1988). Thesis, McGill Univ. (1991). 28. WYNNYCKYJ, J.R...

We evaluated lignin profiles and pulping performances of 2-year-old transgenic poplar (Populus tremula x Populus alba) lines severely altered in the expression of caffeic acid/5-hydroxyferulic acid O-methyltransferase (COMT) or cinnamyl alcohol dehydrogenase (CAD). Transgenic poplars with CAD or COMT antisense constructs showed growth similar to control trees. CAD down-regulated poplars display...

Female mosquitofish (Gambusia affinis holbrooki) downstream from Kraft paper mills in Florida display masculinization of the anal fin, an androgen-dependent trait. The current investigation was designed to determine if water contaminated with pulp-mill effluent (PME) from the Fenholloway River in Florida displayed androgenic activity in vitro and to relate this activity to the reproductive stat...

Abstract The shear modulus of pulp fibers is difficult to measure and only very little literature available on this topic. In work we are introducing a method fiber property utilizing custom built instrument. From the geometry cross section, twisting angle applied torque, derived by de Saint Venant’s theory torsion. deformation moving coil mechanism. support rotating part consists taut bands, m...

To define the abundance and comprehend the reactivity of dibenzodioxocins in lignin, model compound studies, specific degradation experiments on milled wood lignin, and molecular modeling calculations have been performed. Quantitative (31)P NMR measurements of the increase of biphenolic hydroxyl groups formed after a series of alkaline degradations in the presence of hydrosulfide anions (kraft ...

In this study the integration of an absorption heat pump (AHP) with the concentration section of an industrial pulp and paper process is investigated using pinch technology. The optimum design of the proposed water-lithium bromide AHP is then achieved by minimizing the total annual cost. A comprehensive optimization is carried out by relaxation of all stream pressure drops as well as heat excha...

Effects of temperature the tetraethylammonium hydroxide (TEAH)/urea/cellulose solution on viscosity, surface tension, and size cellulose beads were investigated. Hardwood bleached kraft pulp (HwBKP) was used as a sauce dropping method utilized to fabricate beads. Temperature varied from 30℃ 50℃. When increased, viscosity decreased while tension increased. In addition, increasing resulted in inc...