Daim Ntawv Thov thiab Kev Npaj ntawm Hydroxyethy Cellulose Hemc

Hydroxyethyl Methyl Cellulose HemcYuav siv tau raws li tus neeg sawv cev colloid, emulsifier thiab dispersant vim nws cov kev daws teeb meem saum toj hauv cov aqueous. Ib qho piv txwv ntawm nws daim ntawv thov yog raws li hauv qab no: cov kev cuam tshuam ntawm hydroxyethy cellulose ntawm cov khoom ntawm cov cement. Hydroxyether methylulose yog ntxhiab tsw qab, tsis muaj hmoov, tsis muaj hmoov nyob rau hauv dej txias kom tsim ib qho ntshiab, daws. Nws muaj cov khoom siv ntawm thickening, khi, emulsifying, zaj duab xis, nquag, tuav dej noo thiab tiv thaiv colloids. Vim yog cov kev ua haujlwm saum npoo hlau ntawm cov kua aqueous, nws tuaj yeem siv ua tus neeg sawv cev ntawm Colloid tiv thaiv, ib qho emulsifier thiab dispersant. Hydroxyelyl metric poluous kua aqueous kua txiv Muaj zoo hydrophilicity thiab yog lub siab-efficiency dej-tuav tus neeg sawv cev.
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Ib txoj kev rau kev npaj hydroxyethy cellulose, cov qauv muaj kev siv paj rwb refined raws li cov khoom siv raw thiab ethylene oxide raws li tus neeg sawv cev ntawm kev npajHydroxyethyl Methyl CelluloseCov. Cov ntaub ntawv raw rau kev npaj hydroxyethyl methyl methyl cellulose tau npaj nyob rau hauv qhov chaw los ntawm kev sib tov ntawm cov dej, 70-80 ntu ntawm sodium hydroxide, 80-8 feem ntawm Refined Paj Rwb, 20-28 ntu ntawm oxyethane, 80-90 feem ntawm methyl chloride, thiab 16-19 qhov chaw ntawm glacial acetic acid; Cov kauj ruam tshwj xeeb yog:

Thawj kauj ruam, nyob rau hauv lub reactor, ntxiv toluene thiab isopropanol sib tov, dej, thiab socium hydroxide, kom ua kom sov li 60 ~ 80 ℃, yuav raug txiav 20 ~ 40 feeb;

Qhov thib ob kauj ruam, alkalization: txias cov ntaub ntawv saum toj no mus rau 30 ~ 50 ℃℃ to, muab cov tshuaj kho kom zoo nkauj rau 3 hloov alkali tom qab hloov lub alkalization Cov mob muaj raws li hauv qab no: Lub sijhawm Alkalization yog 2 teev, thiab cov alkalization kub yog 30 ° C txog 50 ° C;

Qhov thib peb, etherification: lub alkalization ua tiav, tus reactor tau tawm mus rau 0.07mpa, ethylene oxide thiab metyl chloride tau ntxiv, thiab khaws cia rau 30 ~ 50 feeb; Thawj theem ntawm ethermalation: 40 ~ 60 ~ (0 teev, 1.0 teev, lub siab yog tswj hwm ntawm 0.150.3MPA; Qhov thib ob ntawm ethermalation: 60 ~ 90 ℃, 2.0 ~ 2.5 teev, lub siab yog tswj hwm ntawm 0.40.8mpa;

Cov kauj ruam thib 4, Nineutralization: ntxiv ntsuas glacial acetic acid ua ntej rau cov nag lossis nag lossis daus, kub thiab cov kev kuaj pom pyl 68 Thaum cov nag lossis daus tau ua tiav, lub taub hau kub tau puv nrog cov dej kais dej los ntawm cov khoom noj osmosis rov qab ntawm 90 ℃ ~ 100 ℃;

Cov kauj ruam thib tsib, centrifugal ntxuav: cov khoom siv nyob rau hauv cov kauj ruam thib plaub yog centrifuged los ntawm kab rov tav uas tau hloov nrog dej ntxhua khaub ncaws ua ntej, thiab cov khoom siv tau ntxuav;

Lub kauj ruam rau, centrifugal kom qhuav: cov khoom ntxuav tau thauj mus rau hauv lub tshuab ziab khaub ncaws, cov khoom siv qhuav ntawm 150-170 ° C, thiab cov khoom qhuav yog pulverized thiab ntim.

Piv nrog cov uas twb muaj lawmCellulose etherTshuab ntau lawm, Tam sim no kev txhawb nqa etherthethelther Yuav siv tau es tsis txhob lwm tus kws pab neeg cellulose.