Kev loj hlob ntawm HPMC kev tsim khoom siv thev naus laus zis thiab cov txheej txheem ntawm hydroxypropyl methyl cellulose hauv Suav teb

Kev loj hlob ntawm HPMC kev tsim khoom siv thev naus laus zis thiab cov txheej txheem ntawm hydroxypropyl methyl cellulose hauv Suav teb

Hydroxypropyl methyl celluloseHPMCRau qhov kev tsim khoom hauv tsev tam sim no tau muab qhov tseem ceeb rau cov txheej txheem kua theem, cov thev naus laus zis no yog sawv cev los ntawm Wuxi tshuaj lom neeg kev lag luam tshawb fawb thiab tsim lub koom haum hauv Suav teb chav tshawb fawb hauv xyoo 1970, kev tshawb fawb ua tiav raws li kev txhawb nqa, thawj yog cov roj theem txoj kev etherification tshuaj tiv thaiv, vim tias cov khoom siv tsis hloov kho rau peb lub tebchaws, tom qab ntawd ua haujlwm tawm cov kua theem txoj kev etherification tshuaj tiv thaiv, Txog tam sim no qhov siab da dej piv kua theem etherification tshuaj tiv thaiv txheej txheem tseem yog cov txheej txheem tsim khoom tseem ceeb ntawm qee tus neeg tsim khoom cellulose ether paub zoo.

Feem ntau, cov hydroxypropyl methyl cellulose HPMC hauv tsev siv cov paj rwb ua cov khoom siv raw (qee lub tuam txhab tsim khoom kuj pib sim siv cov ntoo pulp), thiab cov tshuab sib tsoo hauv tsev siv cov paj rwb ua cov alkalization ncaj qha, etherification siv cov organic solvent binary sib xyaw, thiab cov tshuaj tiv thaiv hauv lub reactor ntsug. Cov txheej txheem ntxuav siv cov txheej txheem tsis tu ncua uas cov organic solvent raug tshem tawm hauv lub reactor thiab cov khoom nyoos raug ntxuav los ntawm ntau qhov ntxuav thiab dehydrating los ntawm scrubbers thiab centrifuges. Cov khoom tiav tiav nrog kev sib xyaw ua ke, nyob rau hauv qhov kub (kuj tseem muaj lub tuam txhab tsim khoom tsis muaj granulation), ziab thiab tsoo raws li txoj kev ib txwm muaj, feem ntau ntawm cov txheej txheem tshwj xeeb tsuas yog ncua lub sijhawm hydration ntawm cov khoom (yaj sai sai) kev ua tsis muaj mildew tiv thaiv thiab faib cov txheej txheem, ntim khoom siv txoj kev phau ntawv.

Txoj kev ua kua theem muaj cov txiaj ntsig zoo li nram no: lub zog sab hauv ntawm cov khoom siv tshuaj tiv thaiv me me, qhov xav tau ntawm lub peev xwm siab ntawm cov khoom siv yog qis, muaj kev pheej hmoo me me; Tom qab impregnating hauv lye,cellulosetuaj yeem nthuav dav thiab sib npaug alkalized. Lye muaj kev nkag mus zoo dua thiab o ntawm cellulose. Lub etherification reactor me me, ua ke nrog cov alkali cellulose o sib xws, yog li qhov zoo ntawm cov khoom yooj yim los tswj, qib hloov pauv thiab viscosity tuaj yeem tau txais cov khoom sib xws ntau dua, ntau yam kuj yooj yim los hloov.

Txawm li cas los xij, cov txheej txheem no kuj muaj cov qhov tsis zoo hauv qab no: lub reactor feem ntau tsis loj dhau, cov kev txwv ntawm cov ntaub ntawv ua rau muaj peev xwm tsim khoom me me, txhawm rau txhim kho cov zis, nws yog qhov tsim nyog los nce tus naj npawb ntawm cov reactors; Cov khoom lag luam nyoos uas tau ua kom huv thiab huv si xav tau ntau yam khoom siv, kev ua haujlwm nyuaj, kev siv zog ua haujlwm; Vim tias tsis muaj kev tiv thaiv kab mob mildew thiab kev kho mob sib xyaw, ua rau cov khoom lag luam viscosity ruaj khov thiab cov nqi tsim khoom raug cuam tshuam; Kev ntim khoom los ntawm tes, kev siv zog ua haujlwm, tus nqi ua haujlwm siab; Qib automation ntawm kev tswj hwm cov tshuaj tiv thaiv qis dua li ntawm cov txheej txheem roj theem, yog li qhov tseeb ntawm kev tswj hwm qis dua. Piv nrog rau cov txheej txheem roj theem, cov txheej txheem rov qab ua kom cov kuab tshuaj nyuaj yog qhov yuav tsum tau ua.

Nrog kev txhim kho ntawm cov hydroxypropyl methyl cellulose hauv tsevHPMCthev naus laus zis ntau lawm, qee lub tuam txhab lag luam los ntawm kev tsim kho tshiab tas mus li, txoj kev ua kua dej loj tau tsim los ntawm kev dhia thiab txhais tau tias, thiab muaj nws tus kheej cov yam ntxwv. Anxin chemistry siv cov txheej txheem tsim khoom HPMC thawj, tsis yog tsuas yog cov txheej txheem tsim khoom tsim nyog, cov kev tswj hwm kev ua haujlwm yog qhov tseeb thiab txhim khu kev qha, kev siv tag nrho thiab tsim nyog ntawm cov khoom siv raw thiab lwm yam ntxwv, thiab qib hloov khoom yog sib xws, cov tshuaj tiv thaiv yog qhov ua tiav tag nrho, qhov kev daws teeb meem yog qhov zoo, thiab tib lub sijhawm kom ntseeg tau tias muaj kev ruaj khov ntawm cov khoom zoo. HPMC cov kab ntau lawm ntawm qee lub tuam txhab lag luam tau hloov pauv tsis siv neeg, kom ua tiav cov khoom siv DCS automation tswj cov kev cai, cov ntaub ntawv suav nrog kua, cov khoom siv raw khoom tuaj yeem siv los ntsuas thiab ntxiv DCS system, qhov kub thiab txias tswj hauv cov txheej txheem tshuaj tiv thaiv yog txhua yam paub DCS tsis siv neeg tswj thiab kev saib xyuas deb. Hauv cov nqe lus ntawm kev ua tau, kev ntseeg siab, kev ruaj khov thiab kev nyab xeeb ntawm kev tsim khoom, nws tau pom tseeb zoo dua piv rau hom kev tsim khoom ib txwm muaj, uas tsis tsuas yog txuag cov neeg ua haujlwm, txo cov neeg ua haujlwm siv zog, tab sis kuj txhim kho qhov chaw ua haujlwm ntawm qhov chaw.