Lub teeb cov kev sib txuas lus ntawm hydroxypropyl methylcellulose yog feem ntau cuam tshuam los ntawm cov ntsiab lus hauv qab no:
1. Qhov zoo ntawm cov ntaub ntawv raw.
Thib ob, cov nyhuv ntawm kev ua alkalization.
3. Cov Txheej Txheem Piv Txwv
4. Kev faib tawm ntawm cov kuab tshuaj
5. Cov nyhuv ntawm kev neutralization
Qee cov khoom lag luam zoo li kua txiv tom qab tau ua tiav, qee tus yog cov xim daj, thiab qee qhov teeb meem ... los daws cov teeb meem, kho los ntawm cov ntsiab lus hauv qab no. Qee lub sij hawm acetic acid tuaj yeem cuam tshuam rau lub teeb kev hloov pauv. Nws yog qhov zoo tshaj plaws los siv acetic acid tom qab dmutioning. Qhov cuam tshuam loj tshaj plaws yog seb cov tshuaj tiv thaiv tau ua rau tusyees ruaj khov thiab tsis muaj noo thiab cov ntsiab lus tsis ruaj khov thiab cov kuab tshuaj siv rau kev rov ua dua tshiab). Qhov tseeb, muaj ntau yam cuam tshuam nrog rau. Yog tias cov khoom siv tau ruaj khov thiab cov neeg ua haujlwm tau raug cob qhia zoo, kev tsim khoom yuav tsum ruaj khov. Qhov kev hloov chaw kaj yuav tsis pub tshaj qhov ntau ntawm ± 2%, thiab cov chaw hloov chaw ntawm cov pab pawg hloov pauv tau zoo. Hloov chaw ntawm kev sib txawv, teeb meem kev hloov pauv yuav twv yuav raug zoo.
Qhov cuam tshuam rau cov viscosity ntawm hydroxypropyl methyl cellulose
High-viscosity HolroxyPropylenSylrose tsis tuaj yeem tsim cov cellulose heev tsuas yog los ntawm nqus thiab nitrogen hloov hauv kev tsim khoom. Feem ntau, zus tau tej yam ntawm high-viscosity cellulose hauv Suav teb tsis tau. Txawm li cas los xij, yog tias ib txoj kab kev ua pa oxygen tuaj yeem ntsia tau rau hauv lub laujkaub, cov khoom lag luam ntawm nws hom viscosity tuaj yeem tswj tau artificially.
ua. Ib qho ntxiv, xav txog kev hloov cov nitrogen ntawm nitrogen, nws yog ib qho yooj yim los tsim cov khoom lag luam high-viscosity tsis muaj teeb meem li cas airtight lub system yog. Ntawm chav kawm, qib ntawm polymerization ntawm refined paj rwb tseem yog qhov tseem ceeb. Yog tias qhov ntawd tsis ua haujlwm, ces ua nws nrog hydrophobic koom nrog. Muaj cov koom haum koom nrog hauv thaj chaw no hauv Suav teb. Dab tsi ntawm cov koom haum tus neeg sawv cev rau xaiv muaj qhov cuam tshuam zoo ntawm kev ua haujlwm ntawm cov khoom kawg. Cov tshuaj oxygen tseem ceeb nyob rau hauv tus reactor ua rau muaj kev cuam tshuam ntawm kev ua pa ntawm molecules tau txwv, nws tsis yog qhov nyuaj ua kom cov viscosity siab. Txawm li cas los xij, cov nqi salation muaj ntau yam yuav tau ua nrog cov ntsiab lus ntawm hydroxypropyl. Qee cov Hoobkas tsuas yog xav txo tus nqi thiab tus nqi, tab sis tsis kam nce cov ntsiab lus ntawm hydroxypropyl, yog li tsis muaj peev xwm mus txog qib zoo sib xws. Cov dej tuav cov khoom lag luam uas muaj kev sib raug zoo nrog cov txheej txheem ntawm methylropyl, tab sis rau tag nrho cov txheej txheem methylropyl ,, antio cov txheej txheem ntawm methylrops thiab propylene oxide, alkali concenterration thiab dej khaws cia. Tus piv rau cov paj rwb rov txiav txim qhov ua tau zoo ntawm cov khoom.
Lub Sijhawm Post: Lub Tsib Hlis-23-2023