Peracetic acid

– demand 881

– equilibrium 881

– oxidation capacity 613

– oxidation equivalents (OXE) 264

– post-treatment 883

– pulp bleaching 880

Perforation plates, patterns 53

Permanganate demand, hot acid hydrolysis

permanganate number 1228–1229

Permeability 513

– as function of fiber concentration 514

peroxide bleaching 1132, 1134–1135

– catalyzed 877

– ozonation 1038

– pressurized 866–867

Peroxide solutions, stablity in water 863

Peroxide stage, residence time 865

Peroxide-supported extraction stages,

Temperature effect 865

PGW see pressure groundwood

PH

– acid sulfite cooking liquor analysis 433

– oxygen delignification 704–705

– pine delignification 473

– profile 728

– pulp washing parameter 533–534

– Rauma three-stage sulfite cook 471

– sorbed sodium 520

– spruce pulp yield and acetyl content 474

– sulfite pulping processes 393

– temporal development in AS/AQ pine

Pulping 479

pH effect, ozone bleaching 811–812

PH fall during bleaching, oxidation

Processes 863

Phase transformation model, kappa

Numbers 684

Phases, cellulose I 26

Phenolate anions 703

Phenolic compounds

– absorbance spectra 58

– hardwoods 38

– softwoods 37

Phenolic coupling, hydroxyl radical adducts of

Aromatic structures 654

Phenolic extractives, topochemical

distribution 61–63

Phenolic hydroxyl

– content in lignin samples 636

– content in residual lignin 263

– relative reactivity 635

Phenolic hydroxyl groups

– bleaching 848

– in lignin fractions 173