Ukudluliswa kokukhanya kwe-hydroxypropyl methylcellulose kuthinteka kakhulu ngamaphuzu alandelayo:
1. Izinga lempahla eluhlaza.
Okwesibili, umphumela we-alkalization.
3. Isilinganiso senqubo
4. Ingxenye ye-solvent
5. Umphumela wokungathathi hlangothi
Eminye imikhiqizo iguqubele njengobisi ngemva kokuncibilika, eminye imhlophe njengobisi, eminye iphuzi, kanti eminye icacile futhi isobala… Ukuze uxazulule inkinga, lungisa amaphuzu alandelayo.Kwesinye isikhathi i-acetic acid ingathinta kakhulu ukudluliselwa kokukhanya.Kungcono ukusebenzisa i-acetic acid ngemuva kokuhlanjululwa.Umthelela omkhulu ukuthi ingabe ukusabela kushukunyiswa ngokulinganayo kanye nokuthi isilinganiso sesistimu sizinzile (ezinye izinto ezisetshenziswayo zinomswakama futhi okuqukethwe akuzinzile, njengesincibilikisi esisetshenziselwa ukugaywa kabusha).Eqinisweni, ziningi izici ezithintayo.Uma okokusebenza kuzinzile futhi nabaqhubi beqeqeshwe kahle, ukukhiqizwa kufanele kuzinze kakhulu.Ukudluliswa kokukhanya ngeke kudlule ububanzi obungu-±2%, futhi ukufana kokushintshanisa kwamaqembu abambele kufanele kulawulwe kahle.Esikhundleni sokufana, ukudlulisa ukukhanya kuzoba kuhle.
Izinto Ezithinta I-Viscosity ye-Hydroxypropyl Methyl Cellulose
I-high-viscosity i-hydroxypropyl methylcellulose ayikwazi ukukhiqiza i-cellulose ephezulu kakhulu kuphela ngokufaka i-vacuum kanye nokushintshwa kwe-nitrogen ekukhiqizeni.Ngokuvamile, ukukhiqizwa kwe-cellulose ephezulu-viscosity e-China akukwazi ukulawulwa.Kodwa-ke, uma ithuluzi lokulinganisa i-oxygen lingafakwa eketela, ukukhiqizwa kwe-viscosity yayo kungalawulwa ngokuzenzakalelayo.
yenziwe.Ngaphezu kwalokho, uma kucatshangelwa isivinini sokushintsha i-nitrogen, kulula ukukhiqiza imikhiqizo ene-viscosity ephezulu kungakhathaliseki ukuthi uhlelo lunomoya ongakanani.Vele, izinga le-polymerization likakotini ocolisisiwe nalo libalulekile.Uma lokho kungasebenzi, kwenze nge-hydrophobic association.Kukhona ama-agent enhlangano kule ndawo e-China.Hlobo luni lwe-ejenti yenhlangano okufanele uyikhethe enethonya elikhulu ekusebenzeni komkhiqizo wokugcina.I-oksijeni esele ku-reactor ibangela ukuwohloka kwe-cellulose nokuncipha kwesisindo samangqamuzana, kodwa i-oksijeni esele ilinganiselwe, inqobo nje uma ama-molecule aphukile exhunywa kabusha, akunzima ukwenza i-viscosity ephezulu.Kodwa-ke, izinga lokugcwala lihlobene kakhulu nokuqukethwe kwe-hydroxypropyl.Ezinye izimboni zifuna kuphela ukunciphisa izindleko nentengo, kodwa azizimisele ukwandisa okuqukethwe kwe-hydroxypropyl, ngakho ikhwalithi ayikwazi ukufinyelela izinga lemikhiqizo efanayo yangaphandle.Izinga lokugcinwa kwamanzi lomkhiqizo linobudlelwane obuhle ne-hydroxypropyl, kodwa kuyo yonke inqubo yokusabela, liphinde linqume izinga lokugcinwa kwamanzi, umphumela we-alkalization, isilinganiso se-methyl chloride ne-propylene oxide, ukugxila kwe-alkali nokugcinwa kwamanzi.Isilinganiso ukotini ocolisisiwe sinquma ukusebenza komkhiqizo.
Isikhathi sokuthumela: May-23-2023