Gushyira mu bikorwa no gutegura hydroxyethyl methyl selulose HEMC

Hydroxyethyl methyl selulose HEMC irashobora gukoreshwa nkibikoresho birinda colloid, emulifier na dispersant bitewe nubuso bwayo bukora mubisubizo byamazi. Urugero rwo kubishyira mu bikorwa ni ibi bikurikira: Ingaruka ya hydroxyethyl methyl selulose kumiterere ya sima. Hydroxyethyl methylcellulose ni ifu yera idafite uburyohe, uburyohe, nontoxic ifu yera ishonga mumazi akonje kugirango ibe igisubizo gisobanutse neza. Ifite imiterere yo kubyimba, guhambira, gutatanya, kwigana, gukora firime, guhagarika, adsorbing, gell, gukora-hejuru, kugumana ubushuhe no kurinda colloide. Bitewe nubuso bukora bwibikorwa byamazi yo mumazi, birashobora gukoreshwa nkibikoresho birinda colloid, emulifier na dispersant. Hydroxyethyl methyl selulose yumuti wamazi ufite hydrophilique nziza kandi nikintu cyiza cyane cyo kubika amazi.

itegure
Uburyo bwo gutegura hydroxyethyl methyl selulose, uburyo bukubiyemo gukoresha ipamba itunganijwe nkibikoresho fatizo na okiside ya Ethylene nkumuti wa etherifingi kugirango utegure hydroxyethyl methyl selulose. Ibikoresho fatizo byo gutegura hydroxyethyl methyl selulose byateguwe mubice byuburemere: ibice 700-800 byuruvange rwa toluene na isopropanol nkigisubizo, ibice 30-40 byamazi, ibice 70-80 bya hydroxide ya sodium, 80-85 bya ipamba inoze, ibice 20-28 bya oxyethane, ibice 80-90 bya methyl chloride, nibice 16-19 bya acide acetike glacial; intambwe zihariye ni:

Intambwe yambere, muri reaction, ongeramo toluene na isopropanol ivanze, amazi, na hydroxide ya sodium, ushyushye kugeza kuri 60 ～ 80 ℃, ushyizwemo iminota 20 ～ 40;

Intambwe ya kabiri, alkalisation: gukonjesha ibikoresho byavuzwe haruguru kuri 30 ～ 50 ℃, ongeramo ipamba inoze, utere imvange ya toluene na isopropanol hamwe na solvent, wimuke kuri 0.006Mpa, wuzuze azote kubasimbuye 3, hanyuma ukore alkali nyuma yo kuyisimbuza alkalisation ibintu ni nkibi bikurikira: igihe cya alkalisation ni amasaha 2, naho ubushyuhe bwa alkalisation ni 30 ° C kugeza 50 ° C;

Intambwe ya gatatu, etherification: alkalisation yarangiye, reaktor yimurwa kugeza 0.05 ～ 0.07MPa, okiside ya Ethylene na methyl chloride yongeweho, ikabikwa muminota 30 ～ 50; icyiciro cya mbere cya etherification: 40 ～ 60 ℃, 1.0 ～ 2.0 isaha, umuvuduko ugenzurwa hagati ya 0.150.3Mpa; icyiciro cya kabiri cya etherification: 60 ～ 90 ℃, 2.0 ～ amasaha 2.5, umuvuduko ugenzurwa hagati ya 0.40.8Mpa;

Intambwe ya 4, kutabogama: ongeramo metero ya glacial acetike ya acide mbere yikibabi cyimvura, kanda mubikoresho bya etherifike kugirango bitabogamye, shyushya 75 ～ 80 ℃ kugirango ukore imvura, ubushyuhe buzamuka bugere kuri 102 ℃, kandi kumenya pH agaciro ni 68 Iyo imvura irangiye, ikigega cyimvura cyuzuyemo amazi ya robine yatunganijwe nigikoresho cya osmose kinyuma kuri 90 ℃～ 100 ℃;

Intambwe ya gatanu, gukaraba centrifugal: ibikoresho byo muntambwe ya kane bishyirwa hamwe na centrifuge ya horizontal, hanyuma ibikoresho bitandukanijwe byimurirwa mu isafuriya yo gukaraba yuzuyemo amazi ashyushye mbere, hanyuma ibikoresho birakaraba;

Intambwe ya gatandatu, yumisha centrifugal: ibikoresho byogejwe bijyanwa mu cyuma binyuze muri horizontal centrifuge ya horizontal, ibikoresho byumye kuri 150-170 ° C, kandi ibikoresho byumye birasunikwa hanyuma bipakirwa.

Ugereranije na tekinoroji ya selile ya selile isanzweho, ubu bushakashatsi bwafashe okiside ya Ethylene nka agent ya etherifyinga yo gutegura hydroxyethyl methyl selulose, kandi ifite ubushobozi bwiza bwo kurwanya mildew kuko irimo itsinda rya hydroxyethyl, Ubwiza bwimitsi myiza hamwe no kurwanya indwara mugihe cyo kubika igihe kirekire. Irashobora gukoreshwa aho gukoresha izindi selile.