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– efficiency of chlorine dioxide 768
– formation 180
– hydrolysis 874, 884
– in conventional and RDH pulp 278–279
– influence on kappa number 180
– model 884
– presence 839
– reactions under acidic conditions 421
Hexenuronic acid see HexA
Hexoses
– degradation 420
– hemicelluloses 28
– spent liquor content as function of
Viscosity 459
HHV 968
– kraft recovery boiler 984
Index
Hi-heat washing 384, 558
HI-Q Fine Screen, Impco 601
HI-Q Knotter, GL&V Impco 602
High consistency ozone stage, bleaching 617,
806, 827
High molecular fraction, adsorbable organic
Compounds 771
High-performance anion-exchange
Chromatography, water prehydrolyzate
neutral sugar fraction 340–341
High-purity Eucalyptus prehydrolysis kraft
Pulp 727
High resin content, pulp 1031
High-shear mixers 731
– bleaching equipment 620
– medium-consistency ozone delignification
System 826
– oxygen gas addition 867
– ozone solubilization 802
High-temperature gasification 992
High-viscosity ethers, dissolving pulp
Characterization 1061
High-volume low-concentration 372
Higher heating value see HHV
Himalaya spruce, spiral thickenings 44
HMF see hydroxymethylfurfural
Hole size, in relation to fiber passage ratio
HOMO-distribution, phenylpropene unit 2
Homocellular rays, hardwoods 54
Homolytic decomposition 651
Homolytic fragmentation, veratryl-b-guaiacyl
Ether 751
Hornification 1054
– fibers 1284
hot acid hydrolysis 883–885
– comparison with chorine dioxide 762
– time dependence 885
hot black liquor 136–137, 346, 348, 372–374
hot caustic extract, composition 961–962
hot caustic extraction (HCE) 948, 952–963
– pulp purification 935
– treatment without interstage washing 954
Hot chlorine dioxide process 764
Hot displacement
– displacement cooking process step 369
– prehydrolysis-kraft process 348–350
Hot purification process 934
Hot water extraction 1225
hot white liquor 346, 348, 372–374
HP-AEC see high-performance anionexchange
Chromatography
[HS–]/[OH–] ratio, at different digester
Locations 300
HS– see hydrogen sulfide ion
HSO3
– see hydrogen sulfite ion
Huckel see Debye–Huckel–Onsager equation
Humidity, kraft recovery boiler 985
HVLC see high-volume low-concentration
HW-S see hardwood-sulfite dissolving pulp
HWL see hot white liquor
Hybrid poplar, lignin weight fractions 213
Hydrate cellulose, first indication 935
Hydraulic cook 275
Hydraulic digester
– downflow single-vessel 390
– single-vessel 383, 386, 388
Hydrazine method, carbonyl groups
Determination 1236
Hydrazones, formation 1236
Hydrocyclone 562, 1118
– axial and tangential velocity profile 581
– flow pattern 580
– forces acting on a particle 583
– gravity separator 579
– operation principle 1119
– screening and cleaning equipment
605–606
– streams 579
Hydrodynamically equivalent volume,
Macromolecule 1250
Hydrogel 1052
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