Cov txheej txheem ntau lawm ntawm cov hydroxyethyl cellulose?

Hydroxyethyl cellulose (HEC) yog cov dej-soluble polymer dav siv hauv roj drilling, tsim kho, textiles, textiles, textiles, kws tshuaj pleev ib ce, tshuaj pleev ib ce thiab lwm yam tshuaj lom neeg. Nws cov txheej txheem ntau lawm yuav muaj cov tshuaj tiv thaiv nyuaj thiab kev tswj nruj.

(1) Cov Khoom Siv Khoom Raw

Cov ntaub ntawv nyoos ntawm hydroxyethyl cellulose muaj xws li:
Cellulose: feem ntau yog high-purity paj rwb cellulose los yog ntoo pulp cellulose yog siv, uas yog ua kom tiav rau tshem tawm impurities.
Ethylene oxide: Qhov no yog lub ntsiab etherifyen tus neeg sawv cev siv los qhia hydroxyethyl pawg.
Kev daws teeb meem Alkali: Feem ntau sodium hydroxide tov, siv rau kev ua kom tiav ntawm cellulose.
Organic cov kuab tshuaj: xws li isopropanol, siv kom yaj cellulose thiab txhawb cov tshuaj tiv thaiv.

(2) cov kauj ruam txheej txheem

Alkalization ntawm cellulose:
Tshem cellulose nyob rau hauv ib tug organic huab cua (xws li isopropanol) thiab ntxiv sodium hydroxide tov rau kev ua alkalization.
Hauv cov tshuaj tiv thaiv kev sib txawv, cov hydrogen nyiaj qauv qauv ntawm cellulose tawg, ua cov pab pawg hydroxyl ntawm lub cellulose tau yooj yim hnov ​​nrog ethylene oxide.
Cov tshuaj tiv thaiv alkalization feem ntau nqa tawm ntawm ib qho kub (xws li 50-70 ° C) thiab txuas ntxiv rau ib lub sijhawm nyob rau hauv cov mob.
Ethetification tiv thaiv:

Ethylene oxide yog maj ntxiv rau cov alkalized cellulose system.
Ethylene oxide reacts nrog cov pab pawg hydroxyl ntawm cellulose los tsim hydroxyethyl cellulose.
Cov tshuaj ntsuam kub feem ntau yog nruab nrab ntawm 50-100 ° C, thiab lub sijhawm kev tawm tsam txawv nyob ntawm cov khoom lag luam.
Nyob rau theem no, kev tawm tsam (xws li qhov kub, sijhawm, tus nqi ntawm ethylene oxide, thiab lwm yam) ntawm hydroxyethyl cellulose.
Neutralization Thiab Ntxuav:

Tom qab cov tshuaj tiv thaiv tiav, ib qho acid (xws li hydrochloric acid) tau ntxiv rau neutralize cov tshuaj alkali tau ntxuav kom huv si kom tshem tawm cov tshuaj uas tsis raug thiab cov khoom siv.
Kev ntxuav yog feem ntau nqa tawm los ntawm kev ntxuav dej, thiab tom qab ntau yam ntxuav, tus nqi ntawm cov khoom yog ze rau nruab nrab.
Pom thiab ziab:

Lub tshuab ntxuav hydroxyethyl cellulose tau dhau los ntawm lub lim kom tshem tawm cov dej ntau dhau.
Cov khoom siv lim yog qhuav, feem ntau yog los ntawm cov tshuaj tsuag ziab lossis cua kub kom qhuav, kom txo nws cov lus dej noo rau cov qauv tshwj xeeb (xws li tsawg dua 5%).
Cov khoom qhuav yog cov hmoov los yog cov yeeb yaj kiab zoo.
Crushing thiab ntsuam xyuas:

Lub ziab hydroxyethyl cellulose yog crushed kom ua tiav qhov uas yuav tsum tau loj.

Cov khoom lag luam tsoo raug tshuaj xyuas kom tau txais cov khoom ntawm cov sib txawv me me kom tau raws li cov kev xav tau ntawm cov ntawv thov sib txawv.

Ntim thiab cia:

Lub vijtsam hydroxyethyl cellulose cov khoom tau ntim raws li cov lus qhia tshwj xeeb.

Cov khoom ntim ntim feem ntau yog noo noo-pov thawj thiab plua plav hnab yas lossis lub hnab ntim khoom, ntxiv rau lub hnab woven lossis thawv.

Khaws rau hauv qhov chaw txias, qhuav, zoo-ventilated warehouse kom tiv thaiv noo noo lossis kub tsis zoo.

(3) Tswjhwm Zoo

Kev tswj tau zoo yog qhov tseem ceeb hauv cov txheej txheem ntau lawm ntawm hydroxyethyl cellulose. Nws tsuas yog suav nrog cov hauv qab no:

Cov khoom siv Raw Khoom Siv Raw Khoom Ua Kom Zoo: Xyuas kom meej tias qhov kev coj dawb huv thiab kev ua tau zoo ntawm cellulose, ethylene oxide thiab lwm yam kev pab pawg ua kom tau raws li cov cai.

Cov txheej txheem ntau lawm parameter tswj: Qhov tseeb tswj tau cov tsis xws li qhov kub, siab, lub sijhawm, pH nqi zoo.

Kev ntsuam xyuas cov khoom tiav: nruj me ntsis kev hloov pauv hloov pauv, solubility, kev ua kom paub tseeb, kev ntsuas ntawm cov khoom kawg los xyuas kom meej tias nws ua tau raws li cov neeg siv khoom.

(4) Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
Kev tsim cov hydroxyethyl cellulose muaj cov tshuaj xws li organic kuab tshuaj thiab ethylene oxide. Kev ntsuas kev tiv thaiv ib puag ncig thiab kev nyab xeeb yuav tsum tau ua thaum lub sijhawm tsim khoom:

WASTEWATER Kev Kho Mob: Cov khoom siv dej khib nyiab tsim thaum lub sijhawm tsim khoom yuav tsum raug kho ua ntej tso zis kom tsis txhob muaj kuab paug ib puag ncig.

Khib roj kho cov roj: Ethylene oxide yog tshuaj lom thiab ua pa. Yuav tsum tau kho cov cuab yeej roj teeb xws li cov pa nqus kom txo cov pa phem.

Kev tiv thaiv kev nyab xeeb: Yuav tsum muaj cov khoom siv tiv thaiv tiv thaiv kom tsis txhob muaj kuab lom ua rau muaj kev phom sij. Nyob rau tib lub sijhawm, cov chaw tsim khoom yuav tsum tau nruab nrog kev tiv thaiv hluav taws, tawg kev tiv thaiv thiab lwm yam khoom siv kev nyab xeeb.

Cov txheej txheem ntau lawm ntawm hydroxyethyl cellulose muaj feem cuam tshuam ntau yam kev tswj hwm kev thiab kev tswj cov txheej txheem loj. Los ntawm cov khoom siv ua tiav npaj kom tiav cov khoom ntim tiav, txhua qhov txuas muaj qhov cuam tshuam tseem ceeb rau kev ua tau zoo thiab kev ua tau zoo ntawm cov khoom kawg. Nrog kev nce qib ntawm thev naus laus zis thiab kev txhim kho ntawm kev tiv thaiv ib puag ncig, cov khoom tsim khoom lag luam ntawm cov khoom lag luam zoo, txo cov nqi thiab txo cov nuj nqis thiab txo cov nuj nqis ntawm ib puag ncig.