Sökning: "Pappers- och massateknik"
Visar resultat 1 - 5 av 70 avhandlingar innehållade orden Pappers- och massateknik.
1. Some factors affecting the amount of residual phase lignin during kraft pulping
Sammanfattning : The amount of lignin which needs to be removed according to the slow residual delignification phase in kraft pulping, i e residual phase lignin, has been studied as a function of the process conditions. The variebles studied were the concentrations of hydroxide ions, hydrogensulfide ions, sodium ions (ionic strength) and temperature. LÄS MER
2. Some aspects on TCF-bleachability of softwood alkaline pulps
Sammanfattning : The bleachability of softwood oxygen delignified pulps has been studied, i.e. the ease (requirement of bleaching chemicals) with which the pulps can be brightened to a target brightness in totally chlorine free (TCF) bleaching stages, including hydrogen peroxide, ozone and chelating agent stages. LÄS MER
3. Sulfid- och merkaptankemi i sulfatprocessen
Sammanfattning : .... LÄS MER
4. Några synpunkter på massastyrka hos sulfat- och polysulfidkokad skandinavisk barrved
Sammanfattning : .... LÄS MER
5. Modeling and Control of the Paper Machine Drying Section
Sammanfattning : The topic of this thesis is modeling and control of the last part of the paper machine - the drying section. Paper is dried by letting it pass through a series of steam heated cylinders and the evaporation is thus powered by the latent heat of vaporization of the steam. LÄS MER