|Statement||[by] Jack Weiner and Jerry Byrne.|
|Series||Appleton, Wis. Institute of Paper Chemistry. Bibliographic series, no. 225-226, Bibliographic series (Institute of Paper Chemistry (Appleton, Wis.)) ;, no. 225-226.|
|Contributions||Byrne, Jerry, joint author., Pollock, Vera, joint author.|
|LC Classifications||Z7914.P2 W35|
|The Physical Object|
|LC Control Number||66025241|
Sulfite process, sulfite also spelled Sulphite, chemical process for the manufacture of paper pulp that employs an acid bisulfite solution to soften the wood material by removing the lignin from the e cooking liquor used in the process consists of free sulfur dioxide obtained by the burning of sulfur or by the roasting of iron pyrites, dissolved in water at a concentration of. The sulfite pulping process uses the acid solution in the cooking liquor to degrade the lignin bonds between wood fibers. The efficiency and effectiveness of the sulfite process is also dependent on the type of wood furnish and the absence of bark. Sulfite pulps have less color than kraft pulps and can be bleached more easily, but are not strong. Print book: EnglishView all editions and formats: Rating: (not yet rated) 0 with reviews - Be the first. Subjects: Sulfite pulping process -- Bibliography. Sulfite pulping process. More like this: Similar Items. The 4 processes principally used in chemical pulping are kraft, sulfite, neutral sulfite semichemical (NSSC), and soda. The first 3 display the greatest potential for causing air pollution. The kraft process alone accounts for over 80 percent of the chemical pulp produced in the United States. The choice of pulping process is determined by theFile Size: KB.
In American soldier, chemist and inventor Benjamin Chew Tilghman developed the sulfite pulping process for the manufacture of paper from wood pulp, receiving the US patent on the use of calcium bisulfite, Ca(HSO3)2, to pulp wood in The first mill using this process was built in Bergvik, Sweden in It used magnesium as the counter ion and was based on work by Swedish chemical. Sulphite pulping is the second most important industrial process in terms of annual pulp production, being inferior only to kraft cooking. This chapter presents a brief description of the. Pulping wood by a sulfite process rather than the kraft process has advantages in producing a pulp that can be used in some light-colored products without bleaching and can be readily bleached for others. If pine heartwood is used, however, conventional sulfite pulping liquors of. During the s the sulfite process for pulping wood was the subject of experimental work in Sweden, England, Germany, and Austria. Within a few years the process was in commercial operation both in Europe and in North America. For many decades the sulfite process was the leading process for the pulping of wood.
removed during the pulping process. The fiber from nearly any plant or tree can be used for paper. However, the strength and quality of fiber, and other factors that can complicate the pulping process, varies among tree species. In general, the softwoods (e.g., pines, firs, and spruces) yield long and strong fibers that impart strength to paper and. Odom, J. J., TAPPI Pulping Conf. (Orlando) "Sulfite Pulping: Probable Replacement of the Kraft Process", (Book 2): (Nov. , ). Wood Sources for the Port Huon Mill: NSSC Pulping . The fiber morphology of dissolving pulp is an important factor here, which is highly dependent upon the pulping process and conditions (Duan et alb). For AS process, the active sulfite cooking chemicals penetrate through the pits into the middle lamella so that the pulping reactions start from the primary wall across the cell wall. sulfite pulping or in prehydrolysis-kraft pulping, in which case sulfite pulping is the natural choice for low alfa dissolving pulps, because of the high cellulose yield in the cooking process of these sulfite pulps (13), whereas prehydrolysis-kraft cooking has primarily been used for high alfa pulps ().