Mgbasa ọkụ nke hydroxypropyl methylcellulose na-emetụta isi ihe ndị a:
1. Ogo nke akụrụngwa.
Nke abụọ, mmetụta nke alkalization.
3. Usoro nhazi
4. Oke nke ihe mgbaze
5. Mmetụta nke neutralization
Ngwaahịa ụfọdụ nwere urukpuru dị ka mmiri ara ehi mgbe agbazechara, ụfọdụ na-acha ọcha ọcha, ụfọdụ na-acha odo odo, ụfọdụ doro anya ma doo anya… Iji dozie nsogbu ahụ, gbanwee site na isi ihe ndị a. 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 eji emegharị ihe). N'ezie, e nwere ọtụtụ ihe na-emetụta. Ọ bụrụ na akụrụngwa ahụ kwụsiri ike na ndị na-arụ ọrụ na-azụ nke ọma, mmepụta kwesịrị ịdị mma nke ukwuu. 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.
Ihe na-emetụta viscosity nke Hydroxypropyl Methyl Cellulose
Hydroxypropyl methylcellulose nwere viscosity dị elu enweghị ike imepụta cellulose dị elu naanị site na ikpochapụ na nnọchi nitrogen na mmepụta. N'ozuzu, a pụghị ịchịkwa mmepụta nke cellulose dị elu na China. Otú ọ dị, ọ bụrụ na a pụrụ itinye ihe e ji atụ ihe ikuku oxygen na ketulu, a pụrụ ịchịkwa mmepụta nke viscosity ya n'ụzọ artificial.
mere. Tụkwasị na nke ahụ, n'ịtụle ọsọ ngbanwe nke nitrogen, ọ dị mfe ịmepụta ngwaahịa viscosity dị elu n'agbanyeghị otú ikuku si dị. N'ezie, ogo polymerization nke owu a nụchara anụcha dịkwa oke mkpa. Ọ bụrụ na nke ahụ anaghị arụ ọrụ, mee ya na njikọ hydrophobic. Enwere ndị ọrụ otu na mpaghara a na China. Kedu ụdị onye na-ahụ maka mkpakọrịta ịhọrọ nwere mmetụta dị ukwuu na arụmọrụ nke ngwaahịa ikpeazụ. Igwe ikuku oxygen fọdụrụ na reactor na-akpata mmebi nke cellulose na mbelata nke ịdị arọ molekụla, mana ikuku oxygen fọdụrụnụ nwere oke, ọ bụrụhaala na agbajikwa ụmụ irighiri ihe ndị gbajiri agbaji, ọ naghị esiri ike ime nnukwu viscosity. Agbanyeghị, ọnụego saturation nwere ọtụtụ ihe jikọrọ ya na ọdịnaya nke hydroxypropyl. Ụfọdụ ụlọ ọrụ na-achọ naanị ibelata ọnụ ahịa na ọnụahịa, ma ha adịghị njikere ịbawanye ọdịnaya nke hydroxypropyl, ya mere àgwà enweghị ike iru ọkwa nke ngwaahịa mba ọzọ yiri ya. Ọnụ ọgụgụ njide mmiri nke ngwaahịa ahụ nwere mmekọrịta dị ukwuu na hydroxypropyl, ma maka usoro mmeghachi omume dum, ọ na-ekpebikwa njigide mmiri ya, mmetụta alkalization, oke nke methyl chloride na propylene oxide, ntinye alkali na njide mmiri. Oke maka owu a nụchara anụcha na-ekpebi arụmọrụ nke ngwaahịa ahụ.
Oge nzipu: Mee-23-2023