Txoj kev tsim khoom 1: Cellulose yog lub ntuj tsim ntau tshaj plaws hauv lub ntiaj teb. Nws cov ntaub ntawv raw yog ntoo, paj rwb, paj rwb linter, nplej straw, nplej straw, reed, hemp, mulberry bark, broussonetia papyrifera thiab bagasse. Vim tias tsis muaj peev txheej hav zoov hauv Suav teb, 70 feem pua ntawm cov khoom siv cellulose yog los ntawm cov khoom siv tsis yog ntoo. Qhov nruab nrab cellulose cov ntsiab lus ntawm coniferous thiab hardwood nyob rau hauv Tuam Tshoj yog hais txog 43-45 feem pua ; Qhov nruab nrab cov ntsiab lus ntawm cellulose nyob rau hauv cov nyom stems yog hais txog 40 feem pua. Cov txheej txheem kev lag luam ntawm cellulose yog siv cov tshuaj sulfite los yog cov tshuaj alkali los ua cov khoom siv cog qoob loo, feem ntau yog tshem tawm lignin, uas yog hu ua sulfite method thiab alkali txoj kev feem. Cov ntaub ntawv tau txais yog hu ua sulfite pulp thiab alkaline pulp. Tom qab ntawd cov lignin residual raug tshem tawm ntxiv los ntawm kev siv tshuaj dawb, thiab cov bleached pulp tuaj yeem siv rau papermaking. Ntxiv tshem tawm hemicellulose tuaj yeem siv los ua raw khoom rau cellulose derivatives.
Txoj kev tsim khoom 2: siv fiber ntau cog raw khoom thiab inorganic acid los pound rau hauv paste - Cellulose yog ib nrab depolymerized tom qab kev kho mob, thiab ces lub amorphous ib feem raug tshem tawm thiab purified.
Txoj kev tsim khoom 3: dilute qhov kev xaiv ntawm wood pulp board, thiab ces xa mus rau lub reactor uas tau ntxiv 1 feem pua ~ 10 feem pua hydrochloric acid (dosage: 5 feem pua ~ 10 feem pua) rau cua sov hydrolysis. Qhov kub yog 90 ~ 100 degree, thiab lub sij hawm hydrolysis yog 0.5 ~ 2h. Tom qab cov tshuaj tiv thaiv, nws yog txias thiab xa mus rau lub neutralization tank, hloov mus rau nruab nrab nrog kua alkali, lim lim ncuav mog qab zib yog qhuav ntawm 80 ~ 100 degree, thiab thaum kawg crushed kom tau cov khoom.
Txoj kev tsim khoom 4: cellulose ua los ntawm cov ntaub ntoo los yog paj rwb pulp. Nws yog refined tom qab bleaching thiab mechanical dispersion.
