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25 de sept. de 2023 · Pulp washing is a fundamental process in bleaching sequences that takes place in washer equipment and promotes the contact of the pulp suspension stream with the water stream, allowing the dissolved components of the pulp suspension to migrate to the bulk of the solution.
Bleaching of wood pulp is the chemical processing of wood pulp to lighten its color and whiten the pulp. The primary product of wood pulp is paper, for which whiteness (similar to, but distinct from brightness) is an important characteristic.
17 de dic. de 2020 · Six produced eucalypt (Eucalyptus globulus) kraft pulps, kraft cooked and ECF/TCF bleached at extreme industrial conditions at the CELBI SA kraft pulp mill (Leirosa, Portugal) were pre-selected to cover all the gamma of typically applied technological conditions.
15 de nov. de 2021 · The bleaching sequence with hypochlorous acid, ozone and hydrogen peroxide produced fully bleached pulps, with low organically bound halogens (OX) and aerobically digestible effluents. The bleached pulps and digested effluents complied with international standards for the pulp industry.
ANDRITZ pulp bleaching technology ensures high-quality bleached pulp with minimal environmental loading and impact. The latest ANDRITZ technologies deliver the required brightness with less chemical consumption, saving considerably in operating costs.
We evaluated use of 12 year-old Pinus tecunumanii (Eguiluz & Perry) grown in Colombia for bleached kraft pulp production. Kraft pulps of kappa number 30 + 1 were produced, further oxygen delignified and bleached to 90% ISO with ECF processes.
1 de sept. de 2011 · Abstract. A modified kraft pulping process has been developed which successfully breaks the traditional hardwood kraft pulp yield barrier. The process produces fully bleached, high brightness...
