Hardwoods

– accessory compounds 37–39

– apparent prehydrolysis rate constants 334

– axial parenchymal cells 54

– bleaching 1126

– cellulose 22

– chemical composition of wood 23

– defibration conditions 1102

– diffuse-porous hardwoods 50, 53

– extractives 38

– flavonoids 38

– hemicellulose 22

– homocellular rays 54

– isoflavones 38

– kinetic prehydrolysis model 329–343

– lignans 38

– lignin 22

– lignins 33

– macromolecular substances 22

– parenchymal cells 54

– penetrability 135

– phenolic compounds 38

– pits 46

– pulp 1010

– pulp bleaching 1126

– rays 54

– resin-rich 465

– ring porous hardwoods 53

– sapwood conversion to 59

– semi-ring-porous hardwoods 53

– steroids 37

– tannins 38

– triglycerides 38

– vessels 53

– xylan chains 29

HBL see hot black liquor

HC cleaner, Metso 606

HC technology 721

HCE see hot caustic extraction

HD see hot displacement

Heartwood, Pinus monophylla 36

Heartwood formation 57

Index 1315

heat capacity, black liquor 972–973

Heat exchange, kraft recovery boiler 981

Heat management

– continuous cooking process step 380

– displacement cooking process step 371

heat recovery 1121–1122

– Andritz Lo-Level 391

– conventional 391

– flow sheet 1122

Heat transfer rate, evaporator 976

Heating and cooking, displacement cooking

Process step 370

Heating-up, acid sulfite pulping process

Chemistry 430

Heating values, black liquor solids 969