Hydroxypropyl methylcellulose (Hypromellose), izwi kandi nka hypromellose, ni ifu yera cyangwa yera yera ya selile cyangwa granule, ifite ibimenyetso biranga gushonga mumazi akonje kandi bitangirika mumazi ashyushye asa na methyl selulose.Itsinda rya hydroxypropyl hamwe nitsinda rya methyl byahujwe nimpeta ya glucose ya anhidrous glucose ya selile na ether bond, ikaba ari ubwoko bwa selile idafite ionic ivanze na ether.Ni semisintetike, idakora, viscoelastic polymer ikunze gukoreshwa nk'amavuta yo kuvura amaso, cyangwa nk'ibikoresho cyangwa ibinyabiziga mu miti yo mu kanwa.
kwitegura
Urupapuro rwerekana impapuro zabugenewe zabonetse mu biti bya pinusi bifite alufa selulose irimo 97%, ubwiza bwimbere bwa 720 ml / g, hamwe nuburebure bwa fibre ya mm 2,6 byinjijwe mu gisubizo cy’amazi cya 49% cya NaOH kuri 40 ° C. Amasegonda 50;ibivuyemo byaje gukubitwa kugirango bikureho 49% y'amazi ya NaOH kugirango abone selile ya alkali.Ikigereranyo cyibiro bya (49% NaOH yumuti wamazi) na (ibintu bikomeye muri pulp) murwego rwo gutera akabariro byari 200. Ikigereranyo cyibiro bya (ibirimo NaOH biri muri selile ya alkali yabonetse bityo) kandi (ibintu bikomeye muri pulp) byari 1.49.Alkali selulose rero yabonetse (20 kg) yashyizwe mumashanyarazi ya jacketi hamwe na moteri yimbere, hanyuma yimurwa hanyuma isukurwa na azote kugirango ikure bihagije ogisijeni mumashanyarazi.Ibikurikira, gukurura imbere byakozwe mugihe hagenzurwaga ubushyuhe muri reaktor kugeza kuri 60 ° C.Hanyuma, hiyongereyeho kg 2,4 ya dimethyl ether, hanyuma ubushyuhe muri reaktor bugenzurwa kugirango bugumane kuri 60 ° C.Nyuma yo kongeramo dimethyl ether, ongeramo dichloromethane kugirango igipimo cya molar ya (dichloromethane) kuri (NaOH igizwe na selile alkaline selile) ni 1.3, hanyuma wongereho okiside ya propylene yo gukora (okiside ya propylene) na (muri pulp) Ikigereranyo cyibiro byibintu bikomeye) yahinduwe igera kuri 1.97, mu gihe ubushyuhe muri reaktor bwagenzuwe kuva kuri 60 ° C kugeza kuri 80 ° C.Nyuma yo kongeramo methyl chloride na okiside ya propylene, ubushyuhe muri reaktor bwagenzuwe kuva kuri 80 ° C kugeza kuri 90 ° C.Byongeye kandi, reaction yarakomeje kuri 90 ° C muminota 20.Hanyuma, gaze yajugunywe muri reaction, hanyuma hydroxypropyl methylcellulose ya peteroli ikurwa muri reaction.Ubushyuhe bwa hydroxypropyl methylcellulose mugihe cyo gukuramo bwari dogere 62.Ingano ya 50% ingano yubunini bwagabanijwe hashingiwe ku buremere bwo kugena igenwa hashingiwe ku kigereranyo cya hydroxypropyl methylcellulose itambutse inyura mu mwobo wa sikeli eshanu, buri cyuma gifite ubunini butandukanye bwo gufungura, cyapimwe.Nkigisubizo, impuzandengo yikigereranyo cyibice bito byari mm 6.2.Hydroxypropyl methylcellulose yabonetse rero yinjijwe muburyo bukomeza bwa biaxial (KRC knader S1, L / D = 10.2, ubwinshi bwimbere ya litiro 0,12, umuvuduko wo kuzenguruka 150 rpm) ku gipimo cya kg 10 / hr, kandi habonetse kubora.ya hydroxypropyl methylcellulose.Impuzandengo y'ibipimo byari mm 1,4 nkuko byapimwe kimwe ukoresheje amashanyarazi ya 5 atandukanye yo gufungura.Kuri hydroxypropyl methylcellulose yangirika mu kigega hamwe no kugenzura ubushyuhe bwa jacket, ongeramo amazi ashyushye kuri 80 ° C ku buryo (Ikigereranyo cy’uburemere bw’amafaranga ya selile) kuri (umubare wuzuye wa slurry) cyahinduwe kuri 0.1, kandi habonetse akajagari.Ibishishwa byabyutswe ku bushyuhe buhoraho bwa 80 ° C mu minota 60.Ibikurikira, ibishishwa byagaburiwe mumashanyarazi ashyushye (ibicuruzwa bya BHS-Sonthofen) bifite umuvuduko wa 0.5 rpm.Ubushyuhe bwa slurry bwari 93 ° C.Amashanyarazi yatanzwe akoresheje pompe, naho umuvuduko wo gusohora pompe wari 0.2 MPa.Ingano yo gufungura akayunguruzo k'umuvuduko ukabije wa filteri yari 80 mm, naho akayunguruzo kari 0,12 m 2.Ibishishwa bitangwa kumuzunguruko wumuvuduko uhindurwamo kayunguruzo ya cake ukoresheje kuyungurura.Nyuma yo gutanga amavuta ya 0.3 MPa kuri cake yabonetse bityo, amazi ashyushye kuri 95 ° C yatanzwe ku buryo igipimo cyibiro bya (amazi ashyushye) na (ibintu bikomeye bya hydroxypropyl methylcellulose nyuma yo gukaraba) byari 10.0, Hanyuma, kuyungurura muyunguruzi.Amazi ashyushye yatanzwe na pompe kumuvuduko wa MPa 0.2.Amazi ashyushye amaze gutangwa, hatanzwe amavuta ya 0.3 MPa.Hanyuma, ibicuruzwa byogejwe hejuru ya filteri bivanwaho na scraper hanyuma bisohoka mumashini imesa.Intambwe zo kugaburira ibishishwa kugeza gusohora ibicuruzwa byogejwe bikorwa ubudahwema.Nkurugero rwo gupima ukoresheje hygrometero yumye yumye, amazi yibicuruzwa byogejwe bityo yasohotse ni 52.8%.Ibicuruzwa byogejwe bisohotse muyungurura umuvuduko ukabije byumye byumye hifashishijwe icyuma cyumuyaga kuri 80 ° C.
Porogaramu
Ibicuruzwa bikoreshwa nkibibyimbye, bitatanye, binder, emulifier na stabilisateur mu nganda z’imyenda.Ikoreshwa kandi cyane muri resinike yubukorikori, peteroli, ubukorikori, impapuro, uruhu, ubuvuzi, ibiryo, amavuta yo kwisiga nizindi nganda.
Igihe cyo kohereza: Ugushyingo-15-2022