Muri rusange, mu guhuzahydroxypropyl methylcellulose, cellulose itunganyijwe ivurwa n'umuti wa alkali kuri 35-40°C mu gihe cy'igice cy'isaha, ikanyuzwamo, cellulose igashonga, kandi ikanashyirwa mu bushyuhe bukwiye kuri 35°C, kugira ngo fibre za alkali ziboneke zihuzwe neza. Shyira fibre ya alkali mu isafuriya ikoreshwa mu gushyushya, ongeramo propylene oxyde na methyl chloride, hanyuma ushyiremo etherify kuri 50-80°C mu gihe cy'amasaha 5 kugeza ku gitutu kinini cya 1.8 MPa. Hanyuma ongeramo ingano ikwiye ya aside hydrochloric na aside oxalic mu mazi ashyushye kuri 90°C kugira ngo woze ibikoresho kugira ngo wongere ingano. Ongera amazi ukoresheje centrifuge. Karaba kugeza igihe ntarengwa, iyo amazi ari mu bikoresho ari munsi ya 60%, wumishe ukoresheje umwuka ushyushye kuri 130°C kugeza munsi ya 5%.
Alkalization: Ipamba itunganyijwe ifu nyuma yo gufungura ishyirwa mu kintu kidakora neza, igashyirwamo alkali n'amazi yoroshye kugira ngo inyure agace k'ipamba itunganyijwe, ibyo bikaba byorohereza kwinjira mu ngirabuzimafatizo z'ipamba itunganyijwe kandi bikongera uburinganire bw'imikorere ya etherification. Alkali ikoreshwa muri alkali ni hydroxide y'icyuma cyangwa ishingiro rya organic. Ingano ya alkali yongewemo (ukurikije uburemere, kimwe kiri hepfo) ni inshuro 0.1-0.6 z'ipamba itunganijwe neza, naho ingano y'amazi yoroshye ni inshuro 0.3-1.0 z'ipamba itunganijwe neza; solvent itagira ingufu ni uruvange rwa alcool na hydrocarbon, kandi ingano y'solvent itagira ingufu yongewemo ni ipamba itunganijwe neza. Inshuro 7-15: solvent itagira ingufu ishobora kandi kuba alcool ifite atome 3-5 za karuboni (nka alcool, propanol), acetone. Ishobora kandi kuba aliphatic hydrocarbons na aromatic hydrocarbons; ubushyuhe bugomba kugenzurwa muri 0-35°C mu gihe cyo kuyitunganya; igihe cyo kuyitunganya ni isaha 1. Guhindura ubushyuhe n'igihe bishobora kugenwa hakurikijwe ibisabwa n'ibikoresho n'ibicuruzwa.
Gutunganya umwuka: Nyuma yo gutunganya umwuka, mu gihe cy’umwuka uvamo umwuka, gutunganya umwuka bikorwa hashyirwaho ikintu gihindura umwuka, naho ikintu gihindura umwuka ni propylene oxide. Kugira ngo bigabanye ikoreshwa ry’ikintu gihindura umwuka, ikintu gihindura umwuka cyongewemo kabiri mu gihe cyo gutunganya umwuka.
Igihe cyo kohereza: 28 Mata 2024