Ịdị ọcha nke hydroxypropyl methylcellulose na-ewu ụlọ mkpuchi mkpuchi na ntụ ntụ na-emetụta kpọmkwem àgwà nke ihe owuwu injinịa, yabụ kedu ihe ndị na-emetụta ịdị ọcha nke hydroxypropyl methylcellulose? Ka m zaa gị ajụjụ a.
N'ime usoro mmepụta nke hydroxypropyl methylcellulose, ikuku oxygen fọdụrụ na reactor ga-eme ka mmebi nke hydroxypropyl methylcellulose dị njọ ma belata ịdị arọ nke molekul, ma ikuku oxygen fọdụrụnụ nwere oke, ọ bụrụhaala na ọ naghị esiri ike ijikọghachi ụmụ irighiri ihe mebiri emebi. Ọnụego saturation mmiri kachasị mkpa nwere ọtụtụ ihe jikọrọ ya na ọdịnaya nke hydroxypropyl. Ụfọdụ ụlọ ọrụ na-achọ naanị ibelata ọnụ ahịa na ọnụahịa, mana ha achọghị ịbawanye ọdịnaya nke hydroxypropyl, yabụ àgwà enweghị ike iru ọkwa nke ngwaahịa mba ọzọ yiri ya.
Ọnụego njide mmiri nke hydroxypropyl methylcellulose nwekwara mmekọrịta dị ukwuu na hydroxypropyl, na maka usoro mmeghachi omume dum, hydroxypropyl na-ekpebikwa ọnụọgụ mmiri nke hydroxypropyl methylcellulose. Mmetụta nke alkalization, oke nke methyl chloride na propylene oxide, ntinye nke alkali na oke mmiri na owu a nụchara anụcha niile na-ekpebi arụmọrụ nke ngwaahịa ahụ.
Àgwà nke akụrụngwa, mmetụta nke alkalization, ratio akara nke usoro, ruru nke solvents na mmetụta nke neutralization niile na-ekpebi àgwà nke hydroxypropyl methylcellulose, na ụfọdụ hydroxypropyl methylcellulose na-mere ka igbari E mesịa, ọ bụ urukpuru dị ka ịgbakwunye. mmiri ara ehi, ụfọdụ na-acha ọcha mmiri ara ehi, ụfọdụ na-acha odo odo, ma ụfọdụ doro anya ma doo anya. Ọ bụrụ na ịchọrọ idozi ya, gbanwee site na isi ihe ndị dị n'elu. Mgbe ụfọdụ acetic acid nwere ike imetụta nnyefe ọkụ nke ukwuu. Ọ kacha mma iji acetic acid mgbe dilution. Ihe kacha emetụta bụ ma mmeghachi omume ahụ na-akpali nke ọma yana ma usoro usoro ahụ kwụsiri ike (ụfọdụ ihe nwere mmiri na ọdịnaya adịghị eguzosi ike, dị ka ihe mgbaze na-emegharị ihe). N'ezie, ọtụtụ ihe na-egwu. Site na nkwụsi ike nke akụrụngwa na ọrụ nke ndị na-arụ ọrụ a zụrụ azụ nke ọma, ngwaahịa ndị a na-emepụta kwesịrị ịdị nnọọ mma. Mbufe ọkụ agaghị agafe oke nke ± 2%, yana ngbanwe edobere nke otu ndị nọchiri anya ga-ejikwa nke ọma. Kama ịdị n'otu, nnyefe ọkụ ga-adị mma.
Oge nzipu: Mee-30-2023