DeltaScreen, Metso 602
Demethylation reaction, lignin 169
Density
– black liquor 971
– crystallinity 1262
– dissolving pulp characterization 1062
– hydrogen peroxide 851
– white liquor 116
– wood species 127–128
Dentated discs 92
– chip screens 91
Deoxy-hexoses, hemicelluloses 28
Deoxypentonic acid, black liquor
Composition 968
Depolymerization reactions 937
Design principles, contaminant removal and
fractionation systems 594–596
Detrimental effect, viscosity 814
Dewatering
– compressive 517, 525–526
– press 827
– time 1283
DF see dilution factor
DI see crystallinity, degree of
Diacetate filterability 1028
Diamond rolls
– chip screens 92
– thickness screen 93
Diarylmethane, chlorine bleaching 747
Diarylmethane-type structures, lignin
Chemistry 169
Dichloromethane see DCM
Dideoxypentonic acid, black liquor
Composition 968
Diequatorial intramolecular interactions,
Glycone 327
Diethylene diamine penta-acetic acid see
DTPA
Diethylene triamino penta-acetate 670
– metals removal 861
Different pulp types, ozone treatment
829–840
differential algebraic equations 228–229
differential form, Fick’s second law of
Diffusion 152
Differential MWD
– ozone treatment 845
– shape 844
Differential volume element, annular
(screening theory) 566
Diffuse-porous woods 133
– Aucoumea klaineana 53
– Fagus sylvatica 50
– vessels 53
Diffusely scattered light, scattering methods
Diffusion
– control 800
– dissolved ozone 798
– Fick’s first law 142–143, 220, 517
– Fick’s second law 138, 219, 518
– kraft cooking mass transfer 123, 137–150
– mass transfer 518
– model see Kazi and Chornet diffusion
Model of impregnation
– oxygen gas 671
– parameters 156
– pulp washing theory 517–518
– rate 149
– Stokes–Einstein model 147
diffusion coefficient 138–142
– activation energy dependency 140
– comparative evaluation for sodium ions
149–150
– dependency on wood species 148–149
Index
– determination apparatus 142
– numerically evaluated for different
Conditions 155
– sulfur(IV) species 404
– temperature dependency 140–141
– yield dependence 141
Diffusion washers, pulp washing equipment
552–555
Digester
– batch 367–368
– discharge 370
– dissolved lignin concentration at different
Locations 298
– downflow hydraulic single-vessel 390
– effective alkali 300
– evacuation 129
– hydraulic single-vessel 386, 388
– pressure 403
– single-vessel hydraulic 383
Dihydroxyanthracene, AQ reduction
Product 317
Diluted alkaline hydrogen peroxide,
Decomposition in deionized water 864
Dilution conveyor 827
Dilution factor, pulp washing parameter
529–532, 545–546
dilution/extraction washing 523
Dioxane lignin, residual 704
Dioxins, concentrations 753
dioxygen 641–649
– electronic structure 642
– electrophilic-nucleophilic reactions
647–649
– principles of activation 642–644
– reactions and reduction products 644
– redox potentials 643
– reductions 854
– simplified bonding scheme 642
– see also oxygen
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