Gukoresha no gutegura hydroxyethyl methyl cellulose HEMC

Hydroxyethyl methyl cellulose HEMCishobora gukoreshwa nk'ikintu kirinda kolloid, emulsifier na dispersant bitewe n'imikorere yayo mu gisubizo cy'amazi. Urugero rw'ikoreshwa ryayo ni uru rukurikira: Ingaruka za hydroxyethyl methyl cellulose ku miterere ya sima. Hydroxyethyl methylcellulose ni ifu yera idafite impumuro, uburyohe, idahumanya ishongera mu mazi akonje kugira ngo ikore igisubizo gisobanutse kandi gityaye. Ifite imiterere yo gukomera, gufatanya, gukwirakwiza, gukurura, gukora filime, guhagarika, gukurura, gukora gelling, gukora ku buso, kubika ubushuhe no kurinda colloid. Bitewe n'imikorere y'igisubizo cy'amazi ku buso, ishobora gukoreshwa nk'ikintu kirinda kolloid, emulsifier na dispersant. Igisubizo cy'amazi cya Hydroxyethyl methyl cellulose gifite ubushobozi bwo kuvura amazi neza kandi ni ikintu kigenzura amazi neza cyane.
gutegura
Uburyo bwo gutegura hydroxyethyl methyl cellulose, bugizwe no gukoresha ipamba itunganyijwe nk'ibikoresho fatizo na ethylene oxide nk'ikintu gitanga ubushyuhe mu guteguraselulose ya hydroxyethyl methylIbikoresho fatizo byo gutegura hydroxyethyl methyl cellulose bitegurwa mu bice hakurikijwe uburemere: ibice 700-800 by'uruvange rwa toluene na isopropanol nk'umusemburo, ibice 30-40 by'amazi, ibice 70-80 bya sodium hydroxide, ibice 80-85 by'ipamba itunganyijwe, ibice 20-28 bya oxythane, ibice 80-90 bya methyl chloride, n'ibice 16-19 bya aside glacial acetic; intambwe zihariye ni izi:

Intambwe ya mbere, muri reactor, ongeramo toluene na isopropanol, amazi, na sodium hydroxide, shyushya kugeza kuri 60 ~ 80 ℃, shyira mu cyuma mu minota 20 ~ 40;

Intambwe ya kabiri, gukonjesha ibikoresho byavuzwe haruguru kugeza kuri 30 ～50 ℃, ongeramo ipamba itunganyijwe, shyiramo umuti wa toluene na isopropanol, shyiramo 0.006Mpa, wuzuze azote inshuro 3, hanyuma ushyiremo alkali nyuma yo kuyihindura. Imiterere yo gukonjesha ni iyi ikurikira: igihe cyo gukonjesha ni amasaha 2, kandi ubushyuhe bwo gukonjesha ni 30 ～C kugeza 50 ～C;

Intambwe ya gatatu, etherification: alkalization irangiye, reactor ijyanwa kuri 0.05 ~ 0.07MPa, ethylene oxide na methyl chloride byongerwaho, bikabikwa mu minota 30 ~ 50; icyiciro cya mbere cya etherification: 40 ~ 60℃, isaha 1.0 ~ 2.0, igitutu kigenzurwa hagati ya 0.150.3Mpa; icyiciro cya kabiri cya etherification: 60 ~ 90℃, amasaha 2.0 ~ 2.5, igitutu kigenzurwa hagati ya 0.40.8Mpa;

Intambwe ya 4, gukurura: ongeramo aside glacial asetic yapimwe mbere y'igihe mu gikoresho cyo kunyweramo amazi, kanda mu bikoresho bya etherized kugira ngo bikurure amazi, ushyushye 75 ~ 80 ℃ kugira ngo imvura igwe, ubushyuhe buzamuka bugere kuri 102 ℃, kandi agaciro ka pH ko kumenya ni 68 Iyo imvura irangiye, ikigega cy'imvura cyuzuzwa amazi ya robine yavuwe n'igikoresho cya reverse osmosis kuri 90 ℃ ~ 100 ℃;

Intambwe ya gatanu, gukaraba hakoreshejwe centrifuge: ibikoresho biri mu ntambwe ya kane bishyirwa muri centrifuge hakoreshejwe screw screw itambitse, hanyuma ibikoresho byatandukanyijwe bishyirwa mu isafuriya yuzuyemo amazi ashyushye mbere y'igihe, hanyuma ibikoresho bikarabwa;

Intambwe ya gatandatu, ni ukumisha hakoreshejwe centrifuge: ibikoresho byogejwe bijyanwa mu cyuma cyumisha hakoreshejwe screw centrifuge itambitse, ibikoresho bikuma kuri 150-170°C, hanyuma ibikoresho byumye bigapfunyikwa bigapakirwa.

Ugereranyije n'ibirihoeteri ya seluloseIkoranabuhanga mu gukora, ubu buvumbuzi bukoresha ethylene oxide nk'ikintu gitanga ubushyuhe mu gutegura hydroxyethyl methyl cellulose, kandi bufite ubushobozi bwiza bwo kurwanya ubushyuhe kuko bufite itsinda rya hydroxyethyl, ubushobozi bwo kugumana ubushyuhe bwiza no kurwanya ubushyuhe mu gihe kibitswe igihe kirekire. Bushobora gukoreshwa mu mwanya w'izindi ether za cellulose.