Results 211 to 220 of about 35,476 (250)
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Pre-bleaching of kraft acacia pulp
Nordic Pulp & Paper Research Journal, 2019AbstractKraft pulps from acacia hybrid,Acacia mangiumof 8 years old andAcacia auriculiformisof 6, 8 and 10 years old were pre-treated with oxygen, peroxyformic acid and acid treatment prior to bleaching. The kappa number reduction was 52–63 % by oxygen delignification, 31–35 % by peroxyformic acid (PFA) pre-treatment and 11–13 % by acid pre-treatment ...
Moinul Haque +5 more
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Atmospheric emissions of Kraft pulp mills
Chemical Engineering and Processing: Process Intensification, 2002Abstract This paper describes systematic work done in the field of atmospheric emissions from Portuguese Kraft pulp mills. This study results in the determination of emission factors from stationary sources that proved to be an important tool to assess the need for investment on air pollution abatement equipment, particularly with respect to mal ...
João C.M Bordado, João F.P Gomes
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Production of high yield bleached hardwood kraft pulp: Breaking the kraft pulp yield barrier
TAPPI Journal, 2011A modified kraft pulping process has been developed that successfully breaks the traditional hardwood kraft pulp yield barrier. The process produces fully bleached, high brightness hardwood kraft pulp with a yield of greater than 53% on wood. Details of the development and processing steps, along with various recovery cycle impacts, are discussed.
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Enzymes in bleaching of kraft pulp: Dissertation
1992Cellulose pulp produced by the kraft pulping process is the predominant raw material for production of paper. Although most of the wood lignin is removed during kraft pulping the residual brown coloured lignin must be removed and the brightness of the pulp increased in a multistage bleaching processes prior to paper production.
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Kraft pulping with sulfide pretreatment
Nordic Pulp & Paper Research Journal, 2000Leelo Olm, Disa Tormund
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Softwood kraft pulping with polyacrylonitrile fibers
2017This article presents data on the polyacrylonitrile (PAN) effect upon the elastoplastic and mechanical properties of kraft pulp (unbleached softwood sulphate pulp). In the present research the possibility of obtaining in vitro sulphate pulp together with reinforcing agent of polyacrylonitrile was studied. PAN consumption was varied from 0.05 to 0.20 wt
Chubis, P. A. +3 more
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