Ihame rya reaction ya selulose ether hydroxypropyl methyl selulose: umusaruro wa HPMC hydroxypropyl methyl selulose ukoresha methyl chloride na okiside ya propylene nkibikoresho bya etherification.Ikigereranyo cya reaction ya chimique ni: Rcell-OH (ipamba itunganijwe) + NaOH (hydroxide ya sodium), Sodium hydroxide) + CspanCl (methyl chloride) + CH2OCHCspan (oxyde propylene) → Rcell-O -CH2OHCHCspan (hydroxypropyl methylcellulose) + NaCl (sodium chloride) ) + H2O (amazi)
Inzira igenda:
kumenagura ipamba inoze-alkaliisation-kugaburira-alkalisation-etherification-gukira no gukaraba-gutandukanya centrifugal-gukama-kumenagura-kuvanga -Gupakira ibicuruzwa
1: Ibikoresho bibisi nibikoresho byunganira umusaruro wa hydroxypropyl methylcellulose Ibikoresho nyamukuru ni ipamba itunganijwe, naho ibikoresho bifasha ni sodium hydroxide (sodium hydroxide), okiside ya propylene, methyl chloride, acide acetike, toluene, isopropanol, na azote.Intego yo kumenagura ipamba inoze ni ugusenya imiterere yegeranye yipamba itunganijwe hifashishijwe ingufu za mashini kugirango ugabanye kristu ya polymerisiyasi no kongera ubuso bwayo.
2: Gupima no kugenzura ubuziranenge bwibikoresho fatizo: Hifashishijwe ibikoresho bimwe na bimwe, ubwiza bwibikoresho fatizo byose bifasha kandi bifasha hamwe nigipimo cyamafaranga yongeweho hamwe nubushuhe bwumuti bigira ingaruka muburyo butandukanye bwibicuruzwa.Sisitemu yo kubyaza umusaruro umusaruro urimo umubare munini wamazi, kandi amazi nu mashanyarazi kama ntibishobora kwibeshya rwose, kandi ikwirakwizwa ryamazi rigira ingaruka kumikoreshereze ya alkali muri sisitemu.Niba idashutswe bihagije, bizabangamira alkalisation imwe hamwe na etherifike ya selile.
3.Niba gutatanya no guhuza amazi, alkali, ipamba itunganijwe hamwe na etherifing agent muri sisitemu ya solvent birasa bihagije, bizagira ingaruka itaziguye kuri alkalisation na etherification.Kuzunguruka kutaringaniye mugihe cya alkalisation bizatera kristu ya alkali hamwe nimvura igwa munsi yibikoresho.Igice cyo hejuru cyibanze ni gito kandi alkalisation ntabwo ihagije.Nkigisubizo, haracyari umubare munini wa alkali yubusa muri sisitemu nyuma ya etherification irangiye.Ubumwe, bivamo gukorera mu mucyo muke, fibre nyinshi yubusa, gufata amazi mabi, gel gel nkeya, hamwe nagaciro ka PH.
4: Igikorwa cyo kubyaza umusaruro (inzira yo kubyara ibicuruzwa)
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.kanda alkali mumashanyarazi, hanyuma utere 200Kg yumuti kuri tank ya alkali nyuma yo gukanda alkali.Koza umuyoboro;isafuriya ya reaction ikonjeshwa kugeza kuri 23 ° C, hanyuma hongerwaho ipamba itunganijwe (800Kg).Nyuma yo kongeramo ipamba itunganijwe, 600Kg yumuti uterwa kugirango utangire alkalisation reaction.Kwiyongera kumpamba yatunganijwe neza igomba kurangira mugihe cyagenwe (iminota 7) (uburebure bwigihe cyongeweho ni ngombwa cyane).Iyo ipamba itunganijwe imaze guhura nigisubizo cya alkali, reaction ya alkalisation iratangira.Niba igihe cyo kugaburira ari kirekire cyane, urwego rwa alkalisation ruzaba rutandukanye bitewe nigihe ipamba itunganijwe yinjiye muri sisitemu yo kubyitwaramo, bikavamo alkalisiyasi itaringaniye kandi igabanya ibicuruzwa bimwe.Muri icyo gihe, bizatera alkali selulose guhura nikirere igihe kinini kugirango oxyde kandi iteshwe, bikavamo ubwiza bwibicuruzwa bigabanuka.Kugirango ubone ibicuruzwa bifite urwego rwinshi rwijimye, vacuum na azote birashobora gukoreshwa mugihe cya alkalisation, cyangwa umubare munini wa antioxydeant (dichloromethane) urashobora kongerwamo.Igihe cya alkalisation igenzurwa kuri 120min, n'ubushyuhe bukabikwa kuri 20-23 ℃.
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Imiterere ya Etherification: 950Kg ya methyl chloride na 303Kg ya okiside ya propylene.Ongeramo agent ya etherification hanyuma ukonje hanyuma ukangure muminota 40 hanyuma uzamure ubushyuhe.Ubushyuhe bwa mbere bwa etherification ni 56 ° C, igihe cyubushyuhe burigihe ni 2.5h, ubushyuhe bwa kabiri bwa etherification ni 87 ° C, nubushyuhe burigihe ni 2.5h.Hydroxypropyl reaction irashobora gukomeza nka 30 ° C, igipimo cyibisubizo cyihuta cyane kuri 50 ° C, reaction ya methoxylation itinda kuri 60 ° C, naho intege nke ziri munsi ya 50 ° C.Ingano, igipimo nigihe cya methyl chloride na propylene oxyde, hamwe nubushyuhe bwo kuzamuka kwubushyuhe bwa etherification, bigira ingaruka kumiterere yibicuruzwa.
Ibikoresho by'ingenzi byo gukora HPMC ni reaction, yumisha, granulator, pulverizer, n'ibindi. Kugeza ubu, abanyamahanga benshi bo mu mahanga bakoresha ibikoresho byakorewe mu Budage.Ibikoresho byakorewe mu gihugu, byaba ubushobozi bwo gukora cyangwa ubuziranenge bwo gukora, ntibishobora guhaza ibikenerwa n’umusaruro mwiza wa HPMC.
All-In-One Reactor yakozwe mubudage irashobora kurangiza intambwe nyinshi zikorwa hamwe nigikoresho kimwe, kumenya kugenzura byikora, ubuziranenge bwibicuruzwa bihamye, nibikorwa byizewe kandi byizewe.
Ibikoresho nyamukuru bibyara umusaruro HPMC ni ipamba inoze, hydroxide ya sodium, methyl chloride, na okiside ya propylene.
Igihe cyo kohereza: Ugushyingo-11-2021