HEC rau Detergent

HEC Hydroxyethyl cellulose yog dawb mus rau daj daj fibrous los yog powdery khoom. Non-toxic, tasteless. Nws yog nonionic cellulose ether, soluble nyob rau hauv dej txias thiab kub vim hydrophilic hydroxyethyl nyob rau hauv lub molecule. Nws cov tshuaj aqueous muaj pH tus nqi ntawm 6.5 ~ 8.5 thiab ruaj khov rau cua sov. HEC muaj qhov sib txawv solubility raws li qib kev hloov pauv (DS). Insoluble nyob rau hauv feem ntau cov organic solvents. Nws muaj cov khoom ntawm thickening, suspension, adhesion, emulsification, dispersion thiab noo noo tuav, thiab lwm yam, thiab tuaj yeem npaj cov kev daws teeb meem nrog ntau qhov sib txawv viscosity. Nws muaj qhov tsis zoo ntawm cov ntsev solubility rau dielectric, thiab nws cov kua aqueous tau tso cai kom muaj cov ntsev ntau ntxiv thiab tseem tsis hloov pauv.

Hydroxyethyl cellulose HECcov khoom siv raw

Cov ntaub ntawv tseem ceeb: Lub nroog cellulose (paj rwb staple los yog tsis muaj pulp), kua alkali, ethylene oxide, ethylene diron (40%)

Alkali fiber system yog lub ntuj polymer, txhua lub nplhaib fiber ntau muaj peb pawg hydroxyl, cov tshuaj tiv thaiv hydroxyl tshaj plaws los tsim hydroxyethyl cellulose. Soak cov paj rwb nyoos staple lossis refined zaub mov hauv 30% kua alkali rau ib nrab teev thiab nias nws. Crush rau 1: 2.8 kis ntawm alkaline dej, ces crush. Cov crushed alkali cellulose yog muab tso rau hauv cov tshuaj tiv thaiv kettle, kaw, nqus tsev vacuumized, ntim nrog nitrogen, thiab rov qab vacuumized thiab puv nrog nitrogen los hloov cov huab cua nyob rau hauv rooj plaub. Lub pre-txias ethylene oxide kua tau nias rau hauv lub tsho reactor nrog dej txias, thiab cov tshuaj tiv thaiv tau tswj ntawm li 25C rau 2h kom tau txais hydroxyethyl fiber cable crude khoom. Crude khoom nrog cawv los ntxuav, ntxiv acetic acid neutralization rau VLL 46, jean ntxiv glyoxal crosslinking aging. Tom qab ntawd ntxuav nrog dej, centrifugal lub cev qhuav dej, ziab, sib tsoo, hydroxyethyl cellulose.

1.1 kua alkali

Cov khoom ntshiab yog cov kua tsis muaj xim tsis muaj xim. txheeb ze ntom ntom 2. 130, melting point 318.4C, boiling point 1390C. Caustic soda ntawm kev ua lag luam muaj lub voj voog lub xeev. Thiab kua ob hom: ntshiab khoom caustic soda dawb, flake, thaiv, granular thiab qws zoo, cytoplasm: ntshiab kua caustic soda hu ua kua alkali, tsis muaj xim pob tshab kua. Cov khoom lag luam muaj cov impurities, feem ntau yog sodium chloride thiab sodium carbonate, thiab qee zaum me me ntawm cov hlau oxide.

1.2 ethylene oxide

Ethylene oxide yog ib qho organic compound, tshuaj formula C2H40, yog cov tshuaj lom carcinogen. Epoxy cane yog flammable thiab tawg, tsis yooj yim rau kev thauj mus los ntev, yog li muaj lub zog hauv cheeb tsam. Nws yog dav siv hauv kev ntxhua khaub ncaws, tshuaj, luam ntawv thiab dyeing kev lag luam. 3 oxyethane (E0) yog lub nplhaib yooj yim tshaj plaws ether, belongs rau heterocyclic compounds, yog ib qho tseem ceeb petrochemical khoom. Ethylene oxide yog cov xim tsis muaj pob tshab ntawm qhov kub thiab txias thiab tsis muaj xim tsis muaj roj nrog pungent tsw ntawm ob txhais ceg ntawm chav tsev kub. Lub vapor siab ntawm cov pa roj yog siab thiab tuaj yeem ncav cuag 141kPa ntawm 30C. Qhov siab vapor siab no txiav txim siab qhov muaj zog nkag ntawm epoxy z.alkane thaum steaming. Melting point (C): -112.2. Tus txheeb ze ntom ntom (dej -1): 0.8711

1.3 glyoxal ua

Yellow ribbed los yog irregularly flaky, tig dawb rau txias.

Hydroxyethyl celluloseHEC manufacturingtxheej txheem

Muab tso raupaj rwb staple los yog refined pulp nyob rau hauv 30% lye. Tshem tawm thiab nias. Tom qab ntawd nws yog crushed thiab reacted nrog pre-txias ethylene oxide los tsim crude hydroxyethyl cellulose. Tom qab ntawd ntxuav nrog dej cawv thiab ntxiv acetic acid los ntxuav thiab ntxuav. Tom qab ntawd ntxiv glyoxal crosslinking kev laus, ceev ceev nrog dej. Thaum kawg, tom qab centrifugation lub cev qhuav dej, ziab thiab sib tsoo, tiav lawmHECcov khoom tau txais.

Ib txoj hauv kev tsim cov tshauv qisHEChydroxyethyl cellulose los ntawm cov txheej txheem ntxuav tas mus li belongs rau kev ua haujlwm ntawm cov ntaub ntawv. Qhov teeb meem kev daws teeb meem yog muab cov txheej txheem ntxuav tas mus li nrog kev ua haujlwm siab, kev poob me me ntawm cov kuab tshuaj ntxuav thiab cov khoom siv thiab cov nqi qis los tsim cov tshauv tsawg.HEChydroxyethyl cellulose. Cov txheej txheem ntawm kev ntxuav tas li kom tsim cov hmoov tshauv tsawgHEChydroxyethyl cellulose yog tus cwj pwm nyob rau hauv cov kauj ruam nram qab no: A, crude hydroxyethyl cellulose thiab crosslinking tus neeg sawv cev sib xyaw, crosslinking kho kom tau slurry A; B. Ntxiv cov kuab tshuaj ntxuav rau cov slurry A tau nyob rau hauv kauj ruam A kom tau slurry B; C. Ntxiv cov slurry C tau nyob rau hauv cov kauj ruam B mus rau hauv lub teb siab centrifuge thiab tau txais cov tshauv tsawg hydroxyethyl cellulose tom qab ntxuav tas mus li. Cov txheej txheem tuaj yeem txhim kho kev ua haujlwm tau zoo, txhim kho qhov poob ntawm kev ntxuav cov kuab tshuaj thiab cov khoom siv, thiab txo qis cov hmoov tshauv ntawm cov khoom, uas tsim nyog rau kev nrov nrov thiab kev siv.